REPORT ON THE CEPHALOPODA. 163 



Todarodes, Steenstrup. 

 Todarodes pacificus, Steenstrup (PI. XXVIII. figs. 1-5). 



1880. Todarodes pacificus, Steenstrup, Ommat., Blackspr., pp. 83, 90, &c. 



1886. OmmastrepJies pacificus, Appellof, Japanska Cepli., p. 35, pi. iii. figs. 8-10. 



Habitat — Inland Sea, Japan ; May 25 to 29, 1875. One immature specimen. 

 Hakodadi, Japan (Steenstrup) ; Japan (Appellof). 



This species may be readily distinguished from Todarodes sagittatus (OmmastrepJies 

 todarus, d'Orb. et auctt.) by the following characters : — 



1. The body is evenly cylindrical, and does not taper so rapidly posteriorly. 



2. The tentacular suckers do not make their appearance until nearly halfway along 

 the arm, whereas in Todarodes sagittatus, they begin close to the base. 



3. The suckers of the sessile arms have subequal teeth (eight or nine in number) on 

 the distal semi-circumference of the horny ring, while in Todarodes sagittatus there are 

 seven teeth, of which the central one is much larger than the others. 



The small specimen obtained by the Challenger had lost a good deal of its epidermis, 

 but still it agreed very closely with the type specimens in the Copenhagen Museum, the 

 chief differences being the greater relative shortness of the fin and of the tentacles, both 

 of which may be referred to its immaturity. It was so small that a figure of it would 

 have been of no service, and I am indebted to Professor Steenstrup for the drawings 

 by Mr. Thornam, which are rej)roduced on PL XXVIII. 



Tracheloteuthis, Steenstrup. 



Verrilliola, Pfeffer. 

 Entomopsis, Eochebr. (?). 



This genus has been described by its founder as follows ■} — 



" These forms have the eye fm-nished with a sinus. The siphon with a valve, the 

 head with aquiferous chambers at the bases of the arms, but neither on the arms nor 

 on the tentacles have they hooks instead of rings on the suckers, and hence, according to 

 the present state of our knowledge, they must be classed among the (Egopsids beside 

 Ommatostrephes and Architeuthus. 



" The small specimens hitherto obtained, only 2 to, 4 inches long, have many charac- 

 ters in common with Architeuthus — only two suspensory ligaments to the funnel, only a 

 very long ridge on each side of the mantle and a trough- or groove-shaped hollow on 

 either side of the siphon, together with relatively long tentacles, which have long clubs, 



1 Vid. Meddel. nat. Foren. Kj^henhavn, p. 293, 1881. 



