MOLLUSCA. 
I.—CEPHALOPODA. 
By W. E. Hoyer, M.A., D.Se., The University, Manchester. 
THE collection of Cephalopoda brought home by the ‘Discovery’ consists of a 
number of mandibles, many in a fragmentary condition, obtained from the stomachs of 
seals and penguins, and one larval form. Apparently no special efforts were made to 
collect these animals, for though the group does not seem to be richly represented in 
the Antarctic regions, other expeditions have brought home larger numbers. 
MANDIBLES. 
The specimens of mandibles are as follows :—({1) Stomach of Emperor Penguin, 
January 4, 1902 [H 1350]. Nineteen upper mandibles, apparently all belonging to 
the same species. Eleven lower mandibles, all of one species, and most probably 
belonging to the upper mandibles just mentioned. One upper mandible, apparently of 
a different species, but only fragmentary. I have not succeeded in determining the 
systematic position of any of these, further than that they probably belong to the 
Decapoda. (2) Stomach of Lobodon carcinophaga Second [H 1349]. Three fragments 
probably of the same species as the nineteen mentioned above. (3) Stomach of 
Weddell’s Seal, W.Q., July 24, 1902 [H 1351]. Three upper mandibles of different 
sizes, and belonging to two, possibly three, species. The smallest is an Octopod, the 
two larger Decapods. There is also a lower mandible, which appears to belong to the 
middle-sized upper one. (4) Stomach of Seal, 6, November 10, 1902, Hut Point, 
W.Q., 54° 014'S., 170° 49’ E. [H 1346]. A pair of moderate-sized mandibles, probably 
belonging to an Octopod a couple of feet in total length. A pair of somewhat similar 
mandibles, rather smaller, and probably belonging to a different species. The difference 
in form is small, but the extent of variation of these organs within the limits of a 
species is not yet known [H 1347]. A few fragments of very doubtful position 
[H 1348]. 
LARVAL HISTIOTEUTHID. 
December 27, 1901; Lat. 54° 01}'S.; long. 170° 49’ E. [H 1345]. 
My friend Dr. G. Pfeffer has very kindly examined this young specimen, and has 
favoured me with some notes upon it, a translation of which is here appended : 
