8 AUSTRALASIAN ANTARCTIC EXPEDITION. 
middle, scarcely twice as long as broad. The anterior antenna bears six long sensory 
sete, springing irom three quite separate digitiform processes; frontal tentacle club- 
shaped, reaching not beyond the extremity of the antenna; inner branch of the 
posterior antenna bearing five long terminal sete, and a small wart-like process with 
two very small spine-like sete. Male unknown. 
Several specimens—all females— were taken by the tow-net in a depth of 2 
fathoms off Macquarie Island. - 
This species is separated from other members of the genus by the three distinct 
processes of the anterior antennz, each of them bearing two sensory sete. 
2. ARCHICONCHOECIA AURORZ sp. nov. 
(Plate XVI, figs. 7-9.) 
Female.—Length 2-2 mm. Seen laterally the width is equal to half the length; 
dorsal margin slightly sinuated in the middle, ventral very slightly arched; rostrum 
_ stout, prominent, and sharply pointed ; anterior margin of the shell moderately rounded 
ventrally, posterior rounded off ventrally, abruptly rounded dorsally. Anterior 
antenna bearing two long terminal sete and six shorter sensory ones, all rising from 
the terminal joint. Capitulum of the frontal tentacle pointed and slightly emarginate 
at the apex, its lower margin finely ciliated throughout. 
One specimen only, taken in the tow-net, depth 30 fathoms (6th January, 1914). 
