72 MANUAL OF THE MOLLUSCA. 



Pen short and broad. 



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



ONYCHOTEUTHIS, Lichtenstein. Uncinated calamary. 



Etym., onyx, a claw, and teuthis. 



Type, 0. banksii, Leach. ( = bartlingii?) PI. I., fig. 7 and fig. 8 i 



Syn., ancistroteuthis (Gray). Onychia (Lesueur). 



Pen narrow, with hollow, conical apex. 



Arms with 2 rows of suckers. Tentacles 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 unciuated calamaries are solitary animals, frequenting the open sea, 

 and especially the banks of gulf- weed (sargasso). O. 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. 



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



ENOPLOTEUTHIS, D'Orb. Armed calamary. 



Etym., enoplos, armed, and teuthis. 



Type, E. smithii, Leach. 



Syn., ancistrochirus and abralia (Gray), octopodoteuthis (Ruppell), verani; 

 (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 th< 

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

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

 is an arm of the specimen of E. unguiculata, found by Banks and Solander ii 

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

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

 have a well-founded dread of these formidable creatures. {Owen.) 



Distr., 10 sp. Medit., Pacific. 



OMMASTREPHES, D'Orb. Sagittated calamary. 



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



Type, 0. sagittatus, Lam. 



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

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

 strong, with 4 rows of cups. 



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

 appendix. Length from 1 inch to nearly 4 feet. 



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

 calamary. 



