14, AUSTRALASIAN ANTARCTIC. EXPEDITION. 
STATIONS 1, 2, 5, 7, 8, 9, 11, 13, 15. 
I do not doubt that many specimens here referred to C. propinquus might 
properly be identified with C. simillimus, as defined by Dr. Wolfenden in his report 
on the Copepoda of the Antarctic expedition, and accepted by Dr. Giesbrecht in the 
“ Belgica” report, though apparently only as a variety. But the variations as seen 
amongst the very numerous specimens are so interminable that I prefer to leave them as 
being simply indications of the latitude which, in this respect must be allowed to a 
widely distributed and evidently very prolific species. 
3. CALANUS ACULEATUS sp. nov. 
(Plate IX, figs. 19-23). 
(?) Calanus simillimus Giesbrecht, 1902, plate I, fig. 9. 
Female.—Length, 2-5 mm. Anterior division of the body seen dorsally, 
compressed, ovate, rounded in front, tapered rather abruptly behind, the last thoracic 
segment produced backwardly into two sharply aculeate spines; abdomen comparatively 
short, less than one-half the length of the cephalothoraxg caudal lamin twice as 
long as broad, equal in length to the last abdominal segment, the second caudal seta 
very much longer than the others. Anterior antennz much longer than the body, 
reaching when reflexed beyond the extremities of the tail sete. The two apical antennal 
sets bear long hairs on the outer margins. The teeth of the mandibles are abnormally 
short and blunt. The basal joint of the palp is distorted, its distal end dilated into a 
prominent marginal nodule. The mouth organs and natatory feet are of the usual 
type; the basal joint of the fifth pair is serrated on its inner margin, the three or four 
distal spines slightly separated from the rest, very prominent, and much stronger in 
build. 
The only gatherings in which this species occurred were from Stations 13 and 18— 
Lusitania Bay, tow-net all night, 2 fathoms; and off Maria Island, Tasmania, Station 2. 
Many specimens were found. 
Though the marginal spines of the fifth feet are to some considerable extent 
different from those of C. propinquus, they scarcely form in themselves sufficient basis 
for a distinct species; but the very well-marked spinous extremity of the metasome 
together with the characters of the mandibles and anterior antennz, seem to Drees 
a reference to C. propinquus, the only closely-allied species. 
4. CALANUS TONSUS Brady. 
Calanus tonsus Brady, 1883, p. 34, plate IV, figs. 8, 9. 
The description and figures of this species given in the “ Challenger” report are 
scarcely sufficient for accurate diagnosis, but on reference to actual specimens from one 
rat ae «TEE pam i r = : 
of the “ Challenger gatherings, I think that in many of the Antarctic collections there 
