Male of Ocythoe tuberculata Raf. (=Philonexis catenulatus, Fer.), Mediterranean, showing three stages, A, B, and C., in the development of the hectocotylus arm; h.cy, hectocotylus still in the cyst; c'y', spoon-shaped cyst at the end of the arm when freed; th, thread-like organ freed by the rupture of c'y'....
Description: Ocythoe tuberculata; male with attached hectocotylus that has broken free from its sac. Originally published in: Naef, A. (1921-23). Cephalopoda. Fauna und Flora des Golfes von Neapel. Monograph, no. 35. English translation: A. Mercado (1972). Israel Program for Scientific Translations Ltd., Jerusalem, Israel. 863pp., IPST Cat. No. 5110/1,2. Date: (1972) 5110/. Source: http://tolweb.org/accessory/Ocythoe_additional_features?acc_id=2459. Author: Adolf Naef.