182 Mr. W. E. Hoyle on the 



Promachoteuthis megaptera, Hoyle (loc. cit.). 



The Body is short, barrel-shaped, rounded behind ; the fin 

 is large, transversely elliptical, and extending beyond the end 

 of the body posteriorly ; each half is wider than long. The 

 mantle-viargin is transversely truncated. The mantle-con- 

 nective consists of a linear ridge on either side, fitting into an 

 almond-shaped depression at either side of the base of the 

 siphon, which is short, slender, and has the distal margin 

 everted, like the neck of a flask ; the specimen was so small 

 and indifferently preserved that it was not opened to ascertain 

 whether a valve was present. 



The Head is very small and narrow, almost the whole of 

 its sides being occupied by the eyes, which are not prominent, 

 but covered with a transparent membrane, and with a distinct 

 pore in front of and below each. 



The Arms are unequal, the fourth being the shortest (con- 

 siderably so on the right side) ; the first, second, and third 

 are subequal ; they are on an average about the same length as 

 the body, smoothly conical, and tapering evenly to fine points. 

 The suckers are in two series throughout, pedunculate, 

 spherical, with a lateral aperture directed inwards ; the horny 

 ring is smooth and surrounded by a few large papillaj. The 

 hectocotylus is not developed. There is no trace of an um- 

 brella. The buccal membrane is well developed and has the 

 usual seven points, but they are not very well marked or 

 provided with suckers ; the membrane is not connected with 

 the arms by ligaments. There seems to be only one Z/p, 

 which is thick and papillate. 



The Tentacles arise directly between the third and fourth 

 arms, exactly resembling them at their origin, and obviously 

 being part of one series with them ; the stem is swollen at first 

 and somewhat more than one third up the arms narrows rather 

 suddenly to about half its previous diameter. The club is 

 wanting. 



The Surface is smooth. 



The Colour is a dull purplish madder, paler on the fins 

 (especially their under surface) and on the arms and tentacles. 



The Gladius has not been extracted. 



Hab. North Pacific, east of Japan (Station 237), 1875 

 fathoms. One specimen, sex? 



LOLIGO, Lamarck. 

 Loligo ellijpsura, n. sp. 

 The Body is elongated, widest anteriorly, and tapering 



