106 



THE VOYAGE OF H.M.S. CHALLENGER. 



Tlie Head is short, and nearly as broad as the body. The eyes are spheroidal, and 

 very prominent. 



The Arms are equal, and about half as long again as the body; they are short, 

 stout, and taper gradually to blunt points. The umbrella extends halfway up the 

 arms, — rather more in the largest specimen. The suckers are round, prominent, and 

 deeply cupped, and there are about thirty on each arm. The hectocotylus is not 

 present on any of the specimens, aU being females. 



Tlie Surface is smooth, with the exception of three cirri arranged in a triangle over 

 each eye. (By a mistake of the lithographer the cirri are represented as lielow the eye.) 

 Behind the left eye in the largest specimen the skin is elevated into a number of small 

 papillae, and a few similar ones are seen on the back of the medium-sized specimen. 



TJie Colour is a dull purplish-grey above, inclining to pale ochre below. 



Dimensions. 



55 mm, 

 15 

 20 

 22 

 20 

 23 

 1 



Length, total. 



End of body to mantle-margin. 



End of body to eye, 



Breadth of body, . 



Breadth of head, . 



Eye to edge of umbrella, . 



Diameter of largest sucker, 



Length of first arm, 

 Length of second arm. 

 Length of third arm, 

 Length of fourth arm. 



The three little specimens of Eledone, trawled off the mouth of the Eio de la Plata, 

 are not like any others of the genus known to me. The short arms, the smooth 

 or slightly roughened dorsal surface, and three weU-marked constant cirri over each 

 eye, are very characteristic. 



Eight. 



Left. 



35 mm. 



35 mm 



35 „ 



35 „ 



31 „ 



31 „ 



30 „ 



30 „ 



Eledonella, Verrill. 



Japetella, Hoyle {pars). 



This genus was created by VerrQl in 1884^ for a small Eledone-like Cephalopod 

 dredged by the U.S. Fish Commission Steamer " Albatross " off the American coast 

 in 2949 fathoms. In March of last year, not having then received Professor 

 Verrill's paper, I described a very similar form from the Pacific Ocean under the name 

 Japetella, a genus erected for it and for another form from the South Atlantic, for 

 which I have still retained it, the two forms beiag clearly distinguished by the presence 



1 Second Catal., p. 14. 



