REPORT ON THE CEPHALOPODA. 



105 



and taper gradually to blunt points ; their section shows a triangle projecting inwards, 

 and a rounded surface looking outwards ; the former much more prominent than the 

 latter. The umbrella is wide, extending one-third up the arms, a little further dorsally 

 than ventrally. The suckers are comparatively small, closely set, and deeply cupped. 

 No hectocotylus was found on either specimen, hence they are considered to be females, 

 a supposition subsequently verified in the case of the one whose body was preserved. 



The Surface is perfectly smooth. 



The Colour is dull purple, palest on the body, and deepest on the inner surface of 

 the umbrella. 



The Jaws are shown on PL VIII. figs. 5, 6. 





Dimensions. 







Length, total, 





165 mm. 



End of body to mantle-margin, 





45 





End of body to eye, 





55 



}; 



Breadth of body, . 





45 





Breadth of head, . 





35 





Eye to edge of umbrella, . 





50 



}J 



Diameter of largest sucker, 





3 









Right. 



Left. 



Length of first arm,i 





100 mm. 



105 mm 



Length of second arm, 





105 „ 



100 „ 



Length of third arm, 





110 „ 



100 „ 



Length of fourth arm, 





110 „ 



105 „ 



The better preserved of these two specimens is of interest as having come from the 

 Southern Ocean, of the fauna of which we have but scanty reports ; the mangled 

 remains of another from the South Pacific, which have been referred with some doubt 

 to the same species, indicate that it may perhaps have a wide range in deep water, 

 for both examples appear to be from a depth of about 2000 fathoms. 



Eledone brevis, Hoyle (PI. VIII. fig. 7). 



1885. Eledone hrevis, Hoyle, Diagnoses L, p. 230. 

 1885. „ „ Hoyle, Prelim. Rep. L, p. 106. 



Habitat. — Station 320, ofi" Monte Video, February 14, 1876 ; lat. 37° 17' S., 

 long. 53° 52' W.; 600 fathoms ; green sand. Three specimens, $ . 



TJve Body is short, rounded, and depressed ; blunt behind, and deeply grooved 

 below. The mantle-o])ening extends one-third round the animal, and terminates 

 immediately below the eyes. The siphon is short, acutely pointed, and extends less 

 than halfway to the umbrella margin. 



' The lengths of the amis are measured from the eye. 



(ZOOL, CHALL. EXP. — PART XLIV. 1886.) 



Xx 14 



