Segmented Worms

Local distribution of the polychaetous worm Clymenella torquata. This is likewise determined by the character of the bottom, but is almost the converse of that of Nereis pelagica, the present species being in a large degree restricted to a muddy habitat.

Siphostoma fuscum (The Pipe-Fish).. fig. 19Young embryo, in which the tail is still archicereal and the dorsal and pectoral fins are just developing. fig.20 a still younger stage, in which the tail is just beginning to grow out. fig.21 an older stage, in which the caudal fin is beginning to be formed

Figure 2.Sphaerosyllis levantina sp. n. SEM images of a anterior end and midbody, dorsal view b-c compound chaetae, anterior chaetigers d dorsalmost compound chaetae, anterior chaetiger e compound and dorsal simple chaetae, midbody f dorsalmost compound chaeta, posterior chaetiger g ventralmost compound chaetae, posterior chaetiger h dorsal simple chaeta

Figure 2.A–G Serpula madrigalae sp. n., from Turks and Caicos, USNM 1157006, holotype A–B tube and detail C entire body D–E operculum, in aboral and lateral views F bayonet chaetae G hooded (capillary) chaetae H–J Serpula cf. vermicularis, from Nigeria, UMML 22.545 H–I two distinct opercula in lateral and aboral views J bayonet chaetae.

Figure 3.Namalycastis jaya sp. n.Holotype: a jaw pieces, ventromedial view b anterior parapodium from chaetiger 10 c parapodium from chaetiger 50 d parapodium from chaetiger 100 e posterior parapodium from chaetiger 210 f posterior parapodium from chaetiger 230 g sub-neuroacicular spiniger, chaetiger 10 h sub-neuroacicular falciger, chaetiger 109 i supra-neuroacicular spiniger, chaetiger 80 j sub-neuroacicular spiniger, chaetiger 210 k sub-neuroacicular falciger, chaetiger 210 l supra-neuroacicular falciger, chaetiger 20. Fs Finely serrated; Cs Coarsely serrated; Ms Medium serrated.

Figure 12.Morphology of the lectotype (ZMH V9293) of Glyphidrilus jacobsoni Michaelsen, 1922, showing the A external ventral and B internal dorsal views.

Figure 2.A Eisenia nordenskioldi mongol ssp. n. Holotype anterio-ventral view, dorsal prostomium [plus enlargements with that of P1 boxed], posterior, plus actual setal ratios on 13; spermathecae and calciferous glands in situ, nephridia in 12 & 17 B Eisenia nordenskioldi polypapillata after Perel’ (1969: text-fig) for fair use comparison.

Figure 2.Amynthas jinburi sp. n. showing ventral view with spermathecae and 18rhs prostate in situ plus simple intestinal caecum in 27; dorsal view of prostomium; [boxed is 2X lateral view of spermathecal pores in 5 & 6rhs].

Figure 2.Eurythoe laevisetis from Malta. A live specimen, general view B live specimen, lateral view C live specimen anterior end, dorsal view D detailed view of anterior end, dorsal view E neurochaetae F spurred capillary notochaetae. Eurythoe complanata from Israel G detailed anterior end, dorsal view H harpoon notochaeta I notopodial spurred capillar notochaeta J notoacicular spines.

Figure 2.Caulleryaspis fauchaldi sp. n., juvenile specimen (LACM 5362) A Ventral view B Anterior end, ventral view C Ventro-caudal shield, frontal view D Dorsal view. Bars: A, C, D 0.38 mm B 0.26 mm.

Figure 3.Amphictene guatemalensis. Holotype. A ventral view of anterior end B dorsal view of scaphe D scaphal hooks. Bar scale = A, B = 1 mm; C = 20mm.

Figure 3.Ventral surface of Placobdella appalachiensis sp. n., Holotype USNM 1232924 collected from an adult eastern hellbender (Cryptobranchus alleganiensis) from stream reach A3 in southwest Virginia, USA. Scale bar equals 1 mm.

Figure 3.Schematic view of the external morphology of Eiseniona gerardoi.

Figure 3.A) Spermathecae in segments 9 and 10. Note the double spermathecae in segment 10 of this specimen. B) Nephridial bladder of segment 7.

Figure 3.Mediomastus duobalteus sp. n., paratype, CBM-ZW 1089, SEM images. A Capillary chaetae on segment 3 B notopodial hooded hooks on segment 6 C neuropodial hooded hooks on segment 6 D notopodial hooded hooks on segment 13.

Figure 2.External and internal morphology of holotype (CUMZ 3204) of Amynthas phatubensis sp. n. A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.

Nephthys ingens. Anterior part of body and extended proboscis; ventral view.

Glycera meekelii, with pharynx everted.

Magnified parapodium of Nereis dumerlii: dora, circ, dormal cirrus; vent, cire, ventral cirrus; s, setae.

Figure 3.Sphaerosyllis levantina sp. n. Dorsal (left) and ventral (right) falciger of a anterior b midbody c posterior chaetiger

Figure 5.Exploratory analysis of the number of opercular radii and body length ratio: Serpula madrigalae sp. n. (n= 1, only for reference), Serpula vossae sp. n. (n= 7), and Serpula cf. vermicularis (n= 4).

Figure 13.Morphology of the lectotype (NHM 1922: 4: 20: 618) of Glyphidrilus fluviatilis Rao, 1922, showing the A external ventral and B internal dorsal views.

Figure 3.A Eisenia nordenskioldi onon ssp. n. Holotype sketched as for Figs 1–2 B Allolobophora harbinensis Kobayashi, 1940: fig. 6 (incertae sedis) for comparison.

Figure 1.Perinereis rookeri sp. n. A Anterior end, dorsal view B Proboscis, ventral view C–E Parapodia of chaetigers 11, 30 and 61, anterior view F Supracicular neuropodial heterogomph falciger, chaetiger 11 G Infracicular neuropodial heterogomph falciger, chaetiger 11 H Supracicular neuropodial heterogomph falciger, chaetiger 61 I Infracicular neuropodial heterogomph falciger, chaetiger 61. Measures: A–B = 1 mm; C–E = 250µ; F–I = 30µ.