The first specimen of giant squid studied from Newfoundland waters in 29 years, here identified as Architeuthis dux Steenstrup, was found to demonstrate regeneration of the terminal or club portion of the left tentacular arm. The regenerated club differed in length and width, and in the size and pattern of suckers, when compared with the normal tentacular arm. The process, as interpreted, is compared with the few references to regeneration in other species of decapod cephalopods found in the literature. It is stressed that this regeneration does not comply with Mathilda Lange's (1920) concept of regeneration in decapods by compensatory regulation.

In an attempt to evaluate the possible uses of scanning electron microscopical (SEM) studies of cephalopod radulae, we examined the radulae of 58 specimens (representing 22 species of nine genera), the majority being from the genera Loligo, Rossia, and Illex. Octopod and decapod radulae have considerable differences and were easily distinguished, as were decapod radulae down to the family level. However, considerable differences in radular tooth form between individuals of a species, not related to size or sex of the animals, were found. Also, similarities between species in a genus, and genera in a family were noted. The advantages of the scanning electron microscopical method of examining radulae are discussed.

A black and silvery species with black palpi; runs to couplet 5 in Coquillett's Revision, p. 93, but does not have the characters of either alternative of the couplet. Male-Width of front at narrowest compared with entire width of head gives for 8 males the decimals .263; .