CEPHALOPODA. 71 



Distr., 2 sp. W. Afi-ica. lu the ojien sea. 



This geuus makes the nearest approach to the octopods. 



Sepiola. (Rondelet) Leach, 1817. 



Kv., S. atlantica (D'Orb.) PI. I., fig. 4. 



Bod// short, purse-like ; mantle supported by a broad cervical band, and a 

 ridge fitting a groove in the funnel. Flf/s dorsal, rounded, contracted at the 

 base. Suckers in 2 rows, or crowded, on the arms, in 4 rows on the tentacles. 

 Length 2 to 4 inches. 



Peti, half as long as the back. S. steyiodactyla (sepioloidea, D'Orb.) has 

 no pen. 



Distr., 6 sp. Coasts of Norway, Britain, Medit., Mauritius, Japan, 

 Austraha. 



Siih-f/enus. Rossia, Owen {Fidenas ? Gray). Mantle supported by a 

 cervical ridge and groove. Suckers in 2 rows on the tentacles. Length 3 

 to 5 inches. 



Distr., 6 sp. Regent Inlet, Britain, Medit., Manilla. 



Sub-family B. Oigopsidce, D'Orb. 

 Fijes naked. Fins always terminal, and united, forming a rhomb. 



LoLiGOPSis, Lam. 1811. 

 Fijjm., loligo, and opsis, like. 

 Ti/pe, L. pavo (Lesueur). 



Budij elongated, mantle supported in front by a branchial septum. Arms 

 short. Cups in 2 rows. Tentacles slender, often mutilated. Funnel valveless. 

 Fen slender, with a minute conical appendix. Length from 6 to 12 inches. 

 Distr., pelagic. 8 sp. N. Sea, Atlantic, Medit., India, Japan, S. Sea. 



Cheiroteuthis, D'Orb. 



Mym., cheir, the hand, and tentJds. 



Type, C. veranii, Fer. 



Mmitle supported in front by ridges. Funnel valveless. Ventral arms 

 very long. Tentacles extremely elongated, slender, with distant sessile cups 

 on the peduncles, and 4 rows of pedunculated claws on their expanded ends. 



Pen, slender, slightly winged at each end. Length of the body 2 inches ; 

 to the tips of the arms 8 inches ; to the ends ot the tentacles 3 feet. 



Distr., 2 sp. Atlantic, Medit. On gulf-weed, in the open sea. 

 HiSTioTEUTHis, D'Orb. 



Etym., histion, a veil ; and teuthis. 



Type, H. boneUiana, Per. Length 16 inches. 



Body short. Fins terminal, rounded. Mantle supported in front by 

 ridges and grooves. Buccal membrane 6-lobed. Arms (except the ventral 

 pair), webbed high up. Tentacles long, outside the web, with (i rows of deu- 

 tated cups on their ends. 



