73 MANUAL OF THE MOLLUSCA. 



Pen short and broad. 



Bistr., 2 sp. Mediterranean;, in the open sea. 



Onychoteuthis, Lichtenstein. TJncinated calamary, 



Etpn., onyx, a claw, and teutliis. 



Type, O. banksii, Leach. ( = hartlingii?) PL L, fig. 7 and fig. 8 {pen) 



Syn., ancistrotenthis (Gray). Onychia (Lesuenr). 



Pen narrow, with hollow, conical apex. 



Arms ^^'ith 3 rows of suckers. Teyitacles long and powerful, armed with 

 a double series of hooks ; and usually having a small group of suckers at the 

 base of each club, which they are supposed to unite, and thus use their tenta- 

 cles in conjunction.* Length 4 inches to 2 feet. 



The uncinated calamaries are solitary animals, fi-equenting the open sea, 

 and especially the banks of gulf- weed {sargasso). 0. banksii ranges from 

 Norway to the Cape and Indian ocean ; the rest are confined to warm seas. 

 0. dussumieri has been taken swimming in the open sea, 200 leagues north 

 of the Mauritius. 



Bistr., 6 sp. Atlantic, Indian ocean. Pacific. 



Enoploteuthis, D'Orb. Armed calamary. 



Etym., enoplos, armed, and teuthts. 



Type, E. smithii, Leach. 



Syn., ancistrochirus and abralia (Gray), octopodoteuthis (RuppeU), verania 

 (Krohn). 



Pen lanceolate. Arms provided with a double series of horny hooks, con- 

 cealed by retractile webs. Tentacles long and feeble, with small hooks at the 

 end. Length (excluding the tentacles) from 2 inches to 1 foot ; but some 

 species attain a larger size. In the museum of the College of Surgeons there 

 is an arm of the specimen of E. unguiculata, foand by Banks and Solander in 

 Cook's first voyage (mentioned at p. 64) supposed to have been 6 feet long 

 when perfect. The natives of the Polynesian Islands, who dive for shell-fish, 

 have a weU-founded dread of these fonnidable creatures. {Owen.) 



Bistr., 10 sp. Medit., Pacific. 



Ommastrephes, D'Orb. Sagittated calamary. 



Etym., omma, the eyes, and strepJio, to turn. 



Type, 0. sagittatus. Lam. 



Body cylindrical ; terminal fins large and rhombic. Arms with 2 rows of 

 suckers, and sometimes an internal membranous fringe. Tentacles short and 

 strong, with 4 rows of cups. 



Pen, consisting of a shaft with three diverging ribs, and a hollow conical 

 appendix. Length from 1 inch to nearly 4 feet. 



* The obstetric forceps of Professor Simpson were suggested by the suckers of the 

 calamary. 



