318 NOTE ON A LARGE SQUID. 



1884. It measures from the mouth to the end of the body 39 inches ; 

 in girth 22 inches ; across the fins 23 inches. The tentacles are 36 

 inches in length. 



I have added to this note a table of the chief diagnostic characters 

 of the well-established genera of living Oigopsid Cephalopods. It 

 is not an attempt at a natural classification of these genera^ but only 

 a tabular statement of their characters, which may, I hope, be of 

 some use in identifying specimens — a task by no means easy now, 

 owing to the literature being much scattered. 



For the full literature of the subject, synonyms, &c., I must refer 

 the reader to Mr. Hoyle's excellent Catalogue of Recent Cephalo- 

 poda, published in the " Challenger " Eeports, and in the Proc. 

 Roy. Phys. Soc. Edin. vol. ix, 1886. 



Table of the Chief Gharacters of the Genera of Recent Oigopsid 



Cephalopods. 



A. Siphon without valve. 



A. Siphon without bridles. Mantle attached to head by 3 bands. Three dorsal pairs 



of arms, more or less webbed. 

 a. Pins rounded. Eyes sessile. 

 a^. Pen simple, lanceolate. 



1. Arms with 2 rows of smooth-rimmed suckers. Tentacles with 



smooth-rimmed suckers and slight membrane. Mantle covered 

 with chitinous papillse. Cranchia (Leach, 1817) . 



Ji. Pen with cone. 



2. Arms with 2 rows of suckers. Club of tentacles with 4 rows of 



blunt-toothed suckers, and group of suckers and tubercles 

 forming connective apparatus. Prominent eyes. Seven lobes 

 to buccal membrane. Taonius (Stp., 1861). 



3. Arms short, with 2 rows of suckers. Tentacles absent in adult. 



Eyes prominent. Two rows of cartilaginous papillse on mantle. 



Leachia (Les., 1821). 



S. Pen lanceolate. Fins more or less angular. Eyes pedunculate. 



4. Arms with 2 rows of stalked suckers. Tentacles with 2 rows of 



suckers along the stem and 4 on the club. Suckers all smooth. 

 Eyes pedunculate (sessile in type species ?). Fins terminal. 



Loligopsis (Lam., 1812). [Zygajnopsis, de Roche., 1884.] 



5. Arms with 2 rows of sessile suckers. Tentacles long, with 



tubercles along stem. Fins triangular and subterminal. 



Pyrgopsis (de Roche., 1884). 



B. Siphon with 2 bridles. 



6. Arms with 2 rows of toothed suckers. Club of tentacle with 4 



rows of toothed suckers. Siphon pit with velum. Pen with 

 cone. Seven lobes to buccal membrane. Eye with sinus. Fins 

 rounded. Steenstrupiola (Pfeffer, 1884). 



B. Siphon with a valve. 



A. Siphon without bridles. 



7. Arms with 4 rows of smooth suckers. Club of tentacle with 



many rows of minute suckers. Small sinus. Pen feather- 

 shaped. Suckers on the 7 lobes of buccal membrane. Fins 

 subterminal, rounded. Bathyteuthis (Hoyle, 1885). 



B. Siphon with 1 bridle (probably 2 fused). 



8. Three dorsal pairs of arms, webbed. Socket l-shaped. Pen 



feather-shaped. Fins rounded. Histiopsis (Hoyle, 1885), 



