114 THE VOYAGE OF H.M.S. CHALLENGER. 



the two rows of suckers. It would be interesting to know what is the structure of 

 the tentacular suckers in this form. 



The original description of Inioteuthis morsel {loc. cit.) is very brief, and would 

 fit Sepiola bursa very well, except that it is not mentioned that the proximal suckers 

 are in two series. The uncertainty at present existing among these various species 

 can only be cleared up by their respective authors giving fuU particulars regarding the 

 points alluded to above.'^ 



Sepiola stenodactyla, Grant, ^ recalls this species by the description of its tentacular 

 clubs, which "present a villous appearance but have no suckers developed;" judging by 

 the figures, however, it has a shorter, more rounded body and longer arms, and the eight 

 series of suckers would be quite diagnostic if this character could be relied upon. This 

 is very doubtful, however, because the description speaks of seven or eight rows very 

 irregularly placed, and because no Sepiola has yet been found with other than four 

 distinctly marked series of suckers. 



The extreme contraction of the mouth of the horny ring in the tentacular suckers is 

 a point of great interest, especially when taken in connection with the absence of any 

 roughnesses or papillae on the suctorial surface. It seems to indicate that they adhere 

 by almost pure suction in contradistinction to those of most Decapods, which adhere 

 by a combination of suction with the action of the toothed margin of the ring and the 

 horny papillae surrounding it.^ 



Rossia, Oweru 

 Rossia oiveni, Ball (PI. XV. figs. 1—9). 



1842. Rossia Oioenii et liossia Jacohii, Ball, Proc. Roy. Irish Acad., vol ii. p. 193. 

 1842. „ „ „ „ Ball, Ann. and Mag. Nat. Hist., vol ix. p. 349. 



1844. Rossia Oiveni et Rossia Jticohi, Thompson, Rep. Brit. Assoc, p. 248. 

 184.5. Rossia Oioenii et Rossia Jacobii, d'Orbigny, MoU. viv. et foss., p. 259. 



1845. „ ,, Loven, Ofversigt k. Vetensk. Akad. Forhandl, p. 121. 

 1849. „ „ Gray, B. M. C, p. 90. 



1853. „ „ Forbes and Hanley, Brit. Moll., vol iv. p. 223, pi. sss, fig. 1. 



Habitat. — Ofl' the Butt of Lewis, H.M.S. "Triton," August 25, 1882; 40 fathoms. 

 Three specimens, ? . 



The Minch, H.M.S. " Porcupine," 1869. One specimen, ?. 

 Ofi" Wexford, H.M.S. "Porcupine," 1869. One specimen, $. 



^ Since these remarks were in type, I have received Appellof s interesting Memoir on Japanese Cephalopoda, and 

 his description has left no doubt in my mind that the Challenger specimens are of the same species as those which he has 

 named Inioteuthis morsei, Verrill ; 1 have, therefore, at the moment of going to press adopted that name in the text of 

 this Report The absence of males in the collection is greatly to be regretted, as a comparison of the peculiar hecto- 

 cotylised arm would have rendered the identification still more satisfactory. 



2 Trans. Zool. Soc. Lond., vol. i. p. 84, pi. ii. figs. 1, 2. "^ Niemiec, Becmil zool. Suisse, t. ii. p. 90. 



