1 88 fe * 7iv-m ui if i ') m n ^ m v^m r~ m -f z - m m 



the arms and fins even in their inner or ventral sides, are thickly covered with 

 minute and deep brownish chromatophores, and the chromatophores are imbedded 

 in the skin which comes off easily. 



The radula shows a characters entirel}' different from that of Gonatus fabricii. 

 It comprises 7 series of teeth as it occurs in the most species of the Decanoda, and 

 the median tooth is tricuspid, the lateral teeth, bicuspid, and both marginal teeth, 

 unicuspid, being much longer than the preceding ones especially the outer marginal 

 which are about thrice as long as the median one. 



Reniai'ks. — Berkv mentioned * 2 specimens caught on the coast of North Ame- 

 rica, identifying it with G. fabricii. According to his description and figures, these 

 specimens seem to be identical with my present species, which is easily distinguish- 

 able from G. fabricii as the following key shows. 



1 . Tentacle with 2 or 3 larger hooks and some smaller ones as well as with 

 numerous minute suckers. Three dorsal pairs of arms with 2 marginal series of 

 smaller suckers and 2 central series of larger hooks along whole length. Radula 



with 5 series of teeth ; middle teeth tricuspid, others unicuspid 



Gonatus fabricii (Lichtenstein) . 



2. Tentacle with only suckers of very minute sizes. Three dorsal pairs of 

 arms with 2 marginal series of smaller suckers and 2 central series of a little larger 

 hooks, but at basal and distal portions with only suckers arranged in 4 series. Radula 

 with 7 series of teeth; middle tooth tricuspid, lateral teeth bicuspid and both mar- 

 ginals unicuspid GonaUis septcindentatus sp. nov. 



■■■ Bull. U. S. Bureau of Fisheries, XXX, p. 310, PI. iJi, figs, i, 2; PI. i.iii ; PI. i.iv, figs. 1-4; PI. 

 i.v, figs. I, 3-7- 1912. 



