306 Proceedings of the Boy al Society 
The Colour is a dull grey, with indications of annular markings 
on the hack. 
The Shell has a rhomboidal outline , with rounded anterior and 
lateral angles ; the chitinous margin is narrow, widest behind, where 
it forms a flat, acute-angled plate, the posterior extremity of the 
shell ; it covers entirely, however, the dorsal surface , which is 
slightly raised mesially and marked by a number of faint striae 
radiating from the posterior end. The ventral surface is much 
elevated on either side of a median groove ; the last loculus occupies 
one-sixth of the surface, is bounded by a wavy line, and deeply 
emarginate in the middle. The inner cone is represented only by a 
narrow rib reaching half-way along each posterior side of the shell 
and meeting its fellow in a rounded angle behind, from which a 
number of radiating calcareous streaks pass outwards into the horny 
termination. 
Bab. South of Papua (Station 188), 28 fathoms. One speci- 
men, 9- 
(EGOPSHHE. 
Histiopsis, Hoyle. 
Histiopsis , Hoyle, 1885. Harr. Chall. Exp. vol. i. p. 273 ( nomen tantum). 
Kesembles Calliteuthis , Verrill, in the shape of the body and fin 
and in the pigment spots scattered over it, but has a web extending 
for some distance between the dorsal, dorso-lateral, and lateral arms : 
the suckers are in two series. The siphon has a suspensory ligament 
and a valve. The gladius has not been removed. 
Histiopsis atlantica , Hoyle, (loc. cit.). 
Histiopsis atlantica , Hoyle, Ann. Mag. Nat. Hist. ser. 5, vol. xvi. p. 
201, 1885. 
The Body is short, conical ; acuminate and curving gently down- 
wards posteriorly. Th Qfin is about one-third the length of the body, 
and considerably broader than long ; each half is roughly semi- 
circular, and narrows in to its insertion both in front and behind. 
The mantle-margin is in general transverse, but projects slightly as a 
blunt rounded angle in the dorsal median line. The mantle-con- 
nective consists of a groove with a narrow fillet in the mid-dorsal 
line fitting into a corresponding median cartilaginous surface on the 
