G, M. Tuousos.—New Zealand Crustacea, 248 
superior antenn:; in a very striking manner, this being furnished in this 
gex with a multi-articulate flagellum of about 18 joints. 
19. Themisto antarctica, Dana, U.S. Explor. Exped., p. 1005, pl. 69, fig. 1; 
Spence Bate, Brit. Mus. Cat. Amphip. Crust. p. 812. 
Male, Eyes reddish. Superior antenna with the peduncle 8-jointed ; 
second joint extremely short; third long, slightly arcuate, tapering to the 
extremity, fringed on the lower margin with fine comb-like teeth and 
numerous hairs; flagellum of twelve or thirteen articulations, which 
lengthen towards the extremity, Inferior antenna half as long again as 
the superior; peduncle 8-jointed; flagellum of seventeen slender articu- 
lations, basal one long, those succeeding short, but lengthening to the 
extremity. First pair of gnathopoda with a broad carpus, fringed poste- 
riorly with numerous hairs; propodos about half as broad as carpus, taper- 
ing to the extremity, furnished on the anterior margin with a row of stiff 
cilia. Second pair of gnathopoda having the carpus infero-anteriorly 
produced nearly to the extremity of the propodos, with the inferior margin 
furnished with a few hairs; propodos slightly tapering, and furnished with 
afew hairs on the superior margin; dactylos short and straight. First 
pair of pereiopoda twice as long as the gnathopoda, having the meros short, 
expanded below; carpus stout, with a few hairs on the infero-posterior 
margin; propodos as long as carpus, slender, arcuate, inner margin double, 
the most prominent, and fringed with closely-set, straight, minute cilia, the 
outer with long straight hairs; dactylos subulate. Second pair of pereio- 
poda resembling the first, but having the carpus slightly larger. Third pair 
of pereiopoda nearly twice as long as first two; basos stout; meros short; 
carpus long, and furnished on its anterior margin with equi-distant comb- 
like teeth, and minute, close-set thick cilia between ; propodos long, slightly 
curved and slender, similarly furnished on its anterior margin; dactylos 
short, slender, sharp, and slightly curved. Fourth pair of pereiopoda 
about half the length of the third, and resembling it in form: fifth pair 
like the fourth, but not armed with fine teeth along the anterior margin of 
the propodos. Ultimate pair of pleopoda having the peduncle more than 
four times the length of the telson, and the rami half as long as the 
peduncle, with the margins scarcely serrated; penultimate pair reaching a 
little beyond the extremity of the peduncle of the ultimate; antepenulti- 
mate reaching a little further than the extremity of the penultimate. Telson 
lanceolate. 
Female. Superior antenne with the basal joint of the peduncle nearly 
covering the second; terminal joint (flagellum, according to Sp. Bate) 
elongated, tapering to the point, which is curved like a hook, furnished on 
its lower margin with a row of comb-like teeth. Other characters as above. 
Length about 3 of an inch, 
