Segmented Worms

Ravnkilde ved Rebild Bakker, Jylland, Danmark

Aqua Silkeborg

Lendrup S Løgstør

Danmarks Akvarium

Kvinnherad, Hordaland, Norge

Hampen Sø

Ørnsø

Polynoe squamata.

Diopatra cupres. Head and anterior part of body, showing part of the branchiae; side view.

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.