34 DR. G. 8S. BRADY ON THE 
Male——Abdomen composed of four segments (fig. 14), the first very short, second 
twice as long, third and fourth rather shorter; caudal stylets rather longer than the 
preceding segment. Antennules more nodose than in the female owing to the distal 
dilatation of many of the joints (figs. 12, 13), some of which are more or less distinctly 
coalescent. ‘The fifth foot of the right side is longer than that of the left (fig. 15) ; 
the inner margins of the first and second joints have large lobose protuberances, and 
the last joint is bent upon itself at a right angle, ending in a sharp point; on the left 
side the first joint is broad and quadrangular and has a long seta attached to its 
angulated outer margin ; second joint rather longer and narrower, third dilated at the 
base and bearing on the inner margin of the narrowed distal extremity three small 
setiform lamine. 
Hab. Plentiful in surface gatherings from Otago Harbour, Port Chalmers, Bay of 
Islands, and Napier; also in the net at a depth of 7 fathoms off Gisborne. These 
gatherings consisted almost entirely of females, males being extremely rare; almost 
all had attached spermatophores. 
A form described in the ‘Challenger’ Report under the name of Acartia denticornis 
is very nearly allied to this species, but the antennules of A. ensifera possess no 
well-marked teeth, though these are constantly present in both sexes of A. denticornis. 
The antennules in A. denticornis are fully as long as the animal itself, while in 
A. ensifera they reach scarcely further than the extremity of the cephalothorax. The 
peculiar enlargement of the first segment of the abdomen in the female A. ensifera is 
likewise characteristic. 
Genus Temora Baird. 
1. TEMORA TENUICAUDA, sp. nov. (Plate IX. figs, 16-23.) 
Female.—Cephalothorax robust, width great in proportion to the length (fig. 16), 
broadly rounded in front, abruptly narrowed behind ; angles of the posterior extremity 
rounded off, not at all produced or spinous. Abdomen short, four-jointed, first 
segment about twice as long as either of the following three, and in the adult having 
a pouch-like process on the ventral surface ; caudal stylets cylindrical, extremely long 
and slender, from eight to ten times as long as broad, bearing one small seta on the 
outer margin beyond the middle, and three at the apex, one of which is spathulate at 
its base and nearly as wide as the stylet itself (fig. 18). Antennules sparingly clothed 
with extremely short sete, 24-jointed, slender, about as long as the cephalothorax 
(figs. 16,17). Feet of the fifth pair (fig. 19) simple, rudimentary, three-jointed, the 
last joint nearly twice as long as either of the preceding two and ending in three 
small claw-like sete. Terminal spines of the outer branch of the swimming-feet 
(fig. 20) well-developed and stout, the principal one strongly serrated with about 
fourteen teeth on its inner margin. Length 1°75 millim. 
