34 STALK- AND SESSILE-EYED CRUSTACEA 
84. Hemiplax hirtipes. 
Hemiplax hirtipes, Heller, Voy. Novara, Crust. p. 40, pl. iv, fig. 3, 
(1865). 
Carapace nearly flat above, with the regions but little conspicuous, 
smooth. Front sloping, sinuated in the middle. Antero-lateral margin 
tridentate, the anterior or extraorbital tooth strong, the two following 
smaller, acute. Anterior legs of the male of moderate size, the hand 
oblong, compressed, smooth. Ambulatory legs of the second and fifth 
pairs short, those of the third and fourth pairs elongated, with the 
joints compressed, pilose on the upper margin. Length, 7°; in.; 
breadth +4 in. (H.). 
Auckland (Heller); New Zealand (Coll. Brit. Mus.). 
Sub-Family II. Ocypopinx. 
Ocypodiens, M. Edw. Hist. Nat. Crust. ii, p. 39, (1837). 
Ocypodine, Dana, U.S. Explor. Exped. xin, Crust. part 1, p. 312, 
(1852). 
Carapace very convex anteriorly. Front narrow. Internal antenne 
longitudinally plicate. External antenne placed at a short distance 
from the front. Fourth joint of the external maxillipeds exposed, 
third shorter than the second. 
HELOECIUS. 
Gelasimus, M. Edw. (part) Hist. Nat. Crust. ii, p. 49, (1837). 
Heloecius, Dana, U.S. Explor. Exped. xiii, Crust. part i, p. 319, 
(1852). 
Internal antenne longitudinal, inserted near the front on each side, 
external somewhat remote from the front. Third joint of the external 
maxulipeds shorter than the second. Anterior legs of the male sub- 
equal. Second and third jomts of the external maxillipeds distinctly 
marked with a nearly longitudinal linear furrow. Second joint of the 
abdomen in the male scarcely narrower than the sternum. 
Several species of this genus, which is at once distinguished from 
Gelasimus by its equal hands, have been described from Australia, 
differing in the proportions of the carapace and length of the anterior 
legs, characters which are perhaps not of specific importance. 
