170 MANUAL OP THE MOLLUSCA. 



Distribution, 1 species. Coasts of Norway, Britain, Mediter- 

 ranean, Mauritius, Japan, Australia. 



Sub-genus. Bossia, Owen (R. palpebrosa). Synonym, Hetero- 

 teuthis (Gray). Mantle, supported by a cervical ridge and 

 groove. Suckers in two rows on tlie tentacles. First left arm 

 hectocotylized throughout its length, and the corresponding 

 right one in the middle. Length three to five inches. . 



Distribution, 6 species. Eegent Inlet, Britain, Mediterranean, 

 Manilla. 



Sub -family B. Oigopsidoe, D'Orbigny. 



Eyes naked. Fins always terminal, and united, forming a 

 rhomb. 



LoLiGOPSis, Lam. 1812. 



Etymology, loligo, and opsis, like. 



Synonyms, JjQdiOkidt., Les., 1821; Perotis, Eschscholtz, 1827; 

 Taonius, Steenstrup, 1861. 



Tyjpe, L. pavo (Lesueur). 



Body elongated, mantle supported in front by a branchial 

 septum. Arms short. Cups in two rows. Tentacles slender, 

 often mutilated. Funnel valveless. 



Fen slender, with a minute conical appendix. Length from 

 six to twelve inches. 



Distribution, pelagic, 8 species. North Sea, Atlantic, Medi- 

 terranean, India, Japan, South Sea. 



Cheiroteuthis, D'Orbigny. 



Etymology, cheir, the hand, and teuthis. 



Type, 0. veranii, Per. 



ilfaTz^Ze supported in front by ridges. Funnel YalvBless. Ven- 

 tral arms very long. Tentacles extremely elongated, slender, 

 with distant sessile cups on the peduncles, and four rows of 

 pedunculated claws on their expanded ends. 



Pen slender, slightly winged at each end. Length of the body 

 two inches ; to the tips of the arms eight inches ; to the ends of 

 the tentacles three feet. 



Distribution, 2 species. Atlantic, Mediterranean ; on gulf- 

 weed in the open sea. 



HiSTiOTETjTHis, D'Orbigny. 



'Etymology, hisfion, a veil, and teuthis. 



Vype, H. bonelliana, Fer. Length 16 inches. 



Jiody short. Fins terminal, rounded. Mantle supported in 



