118 U.S. NATIONAL MUSEUM BULLETIN 234 



membrane. The suckers are small, closely set, with romid apertures 

 slightly pointed distally, and the sucker rings are smooth. 



The tentacles are short, stout, square in cross-section. The outer 

 ventral corner is rounded, the others are sharply angled and the 

 outer dorsal is keeled, the keel terminating distally just distal to the 

 carpal cluster. The club is slightly expanded ; there are no protective 

 membranes, but a keel or web is found on the dorsal border originating 

 near the base of the second club hook and extending to the tip. There 

 is also a small thin web originating at the carpal cluster and extending 

 outward and upward, terminating at the base of the fifth hook of the 

 ventral row. The carpal cluster forms a distinct circular patch 

 surrounded by a fleshy ridge. On the left tentacle^ the cluster consists 

 of 10 small suckers and 9 pads; on the right tentacle there are 10 

 suckers and 10 pads. On the club proper there are no suckers, their 

 place being taken by 2 rows of hooks, 10 ventral and 10 dorsal on the 

 left club and 11 dorsal and 10 ventral on the right club. The hooks 

 of the dorsal row are all small and compact whereas on the ventral 

 row, hooks 4-10 are enlarged, the middle ones long and slender. There 

 is a small patch of about 13 minute suckers at the distal extremity of 

 the club. 



The color in alcohol is a uniform yellowish brown in which a few 

 brown chromatophores may be seen, although there are a few on either 

 side of the gladius. 



The buccal membrane has seven supports and seven lappets. 



There are two round light organs within the mantle cavity; one 

 located on the ventral surface of the ink sac, the smaller one embedded 

 just above the anus and slightly proximal to the opening. 



Measm'ements and indices of an immature female Onychoteuthis 

 banksi (Leach) are: 



Type. — British Museum (Natural History). 



Type locality. — Not traced. 



Discussion. — Pfeffer (1912) has given a thorough treatment of 

 this species and nothing can be added here. This is the most truly 

 cosmopolitan of all of the squids; it dwells in the upper layers of the sea. 



Distribution. — Cosmopolitan in warm and temperate seas. It has 

 been recorded from as far north as Ham m erf est, Norway, and as far 



