202 Oyi the ' Challenge)' ' Cephalopoda. 



the other is shrivelled. There is no auricular crest and no 

 preocular pore, but behind each eye is a white papilla. 



The Arms are about equal in length to the head and. body 

 together ; the dorsal are the shortest, the other three pairs 

 subequal, the order of length being 3, 4, 2, 1 ; they are quadri- 

 lateral with rounded angles externally, with two slightly 

 raised ridges internally, on which the suckers are situated ; 

 they taper gradually to very slender tips ; the third pair have 

 a delicate narrow web along the third quarter of their outer 

 aspect. The suckers are in two series throughout ; they are 

 small and distant along the proximal third (the webbed 

 portion) of the arms, then larger and closer, and finally minute 

 and very closely set towards the tips j they are set trans- 

 versely on short conical peduncles, spheroidal with a swollen 

 band round the face. The horny ring is smooth proximally ; 

 distally it bears about five close-set, broad, bluntly rounded 

 teeth. No trace of a hectocotylus could be found. The um- 

 brella is found only between the dorsal, dorso-lateral, and 

 lateral arms ; it takes origin from the sucker-bearing ridge 

 and extends about one third up the arms. The huccal mem- 

 brane is broad and somewhat contracted over the mouth j it 

 has the usual seven points, but they are very blunt and indi- 

 stinct J it is united by three ligaments with the web between 

 the dorsal and dorso-lateral arms, by a ligament with the 

 inner side of each ventro-lateral arm on its ventral aspect and 

 by another to the inner surface of each ventral arm, there 

 being altogether seven ligaments. The membrane bears no 

 suckers ; its inner surface is much creased and folded. The 

 outer lip is very thin and smooth, and hidden between the 

 creased integument of the buccal membrane and the inner lip, 

 which is thick and marked with irregular radial grooves. 



The Tentacles have been removed ; the stumps which re- 

 main are not half the length of the arms ; they are quadran- 

 gular and flattened from above downwards. 



The Surface bears a large number of papillae, slightly ele- 

 vated, resembling those of Calliteuthis ; they are arranged 

 most thickly on the ventral aspect of the head and body, but 

 also on the dorsal, and extend up the outer aspect of the arms, 

 three series on the ventral arms, two on each of the others. 

 Near the tip of each dorsal arm is a series of four or five 

 black, elongate, egg-shaped swellings, gradually diminishing 

 in size, and forming apparently an extreme development of the 

 papillae above mentioned. The second pair of arms appears 

 to have been similarly provided ; the third has been so stripped 

 of integument towards the tips that it is impossible to ascer- 

 tain their original condition. In the fourth the warts at the 

 tip are quite similar to those lower down the arm. 



