1916.] 



NATURAL SCIENCES OF PHILADELPHIA. 



59 



4 



Fig. IS. Muni ii, p- 



sis (?), late r a I 

 V i e w of 1 a r g e 



hook from left 

 tent a c 1 e club 

 [419], X 30, cam- 

 era drawing from 

 mount in balsam. 



base of the filaments. Otherwise the specimen is a fairly typical 

 Abraliopsis. 



The tentacle club much resembles that of the preceding, as de- 

 scribed in my former paper. 

 There are four large slender 

 hooks in the ventral row, ami 

 three (or four?) small ones in 

 the dorsal row, the latter being 

 succeeded proximally by two 

 minute 1 suckers. The distal 

 portion of the club is occupied 

 by the usual four rows of small 

 suckers. I can make out only 

 two suckers in the fixing ap- 

 paratus (figs. 17, 18). 



The photogenic organs of the mantle are dis- 

 tributed longitudinally in bands and lines. There 

 is a conspicuous, clearly defined space free of 

 photophores along the medio-ventral line. Bound- 

 ing this on either side is a roughly triserial, 

 band-like aggregation of photogenic organs, the 

 central members of which tend to be larger 

 than the lateral ones. This band is succeeded 

 laterally by a single series of large and small 

 photophores, more or less in alternation. A 

 weak series of small organs is then followed by 

 a very distinct single line of photophores, beyond 

 which the organs are scattering and less regular. 

 There are eight rows on the ventral aspect of 

 the head, and the rudiments of perhaps as many 

 on the funnel. Each central arm bears two rows. 

 The two terminal photophores of the subocular group are con- 

 spicuously larger than the three median ones, and of the latter the 

 central organ is in its turn a little the largest. 



Fig. 17. — Abraliop- 

 sis (?), inner face 

 of righl tentacle 

 club of young 

 specimen [-419], 

 X 15, free-hand 

 sketch from 

 mount in balsam. 

 The arrangement 

 and number of 

 the distal suckers 

 is only approxi- 

 mated. 



Family OMMASTREPHID^E. 

 Genus STHENOTEUTHIS Verrill, 1880. 

 14. Sthenoteuthis bartramii (Lesueur, 1821). 



1X21. Loligo bartramii Lesueur, Jour. Acad. Nat. Sci. Phila., 2, p. 90, pi. 7 

 lssii. Sthenoteuthis Bartramii Verriil, Trans. Conn. Acad. Sci.j •">, p. 223. 

 1914. Sthenoteuthis bartramii Berry, Trans. X. Z. Inst.. 46, p. 148. 



