OF NEW ZEALAND. Sl 
VIRBIUS. 
Hippolyte, Leach, (part) Trans. Linn. Soe. xi, p. 347, (1815); M. 
Edw. (part) Hist. Nat. Crust. li, p. 370, (1837); Dana, (part) U.S. 
Explor. Exped. xiii, Crust. part i, p. 534, (1852). 
Virbius, Stimpson, Proc. Acad, Nat. Sci. Philad. p. 35, (1860). 
Resembles Hippolyte, but with the back of the carapace and rostrum 
ecarinate. Mandibles not palpigerous. External maxillipeds short, 
with an outer but not an inner palpus. Legs without a palpiform 
appendage. Legs of the first pair with the wrist excavate anteriorly, 
of the second pair with the wrist triarticulate. 
The rostrum, which rises from the anterior margin of the carapace, 
and the few jointed wrist, are external characteristics which sufficiently 
distinguish this genus. 
> 
86. Virbius bifidirostris. Pl. I, fig. 1. 
Virbius bifidirostris, Miers, Ann. Mag. Hist. (ser. 4) xvii, p. 224, 
(1876). 
Carapace smooth, with two minute spines on each side below the 
eyes. Rostrum slender, longer than the carapace, and nearly as long 
as the scale of the external antenne, with two teeth on the upper 
margin, placed at some distance from one another, and another minute 
near the apex, which thus appears bifid, lower margin with seven 
teeth. Scale of the external antenne without a spine at base, but 
with a small spine at the distal extremity of the outer margin. Exter- 
nal maxillipeds about reaching to the end of the peduncle of the outer 
antenne, terminal joint dilated and minutely spinulous. First pair of 
legs very short, when directed forward not reaching to the end of the 
external maxillipeds. Second pair of legs with the joints of the wrist 
short, the second joint the shortest. Terminal segment of abdomen 
and caudal appendages slender. Length 14 in. 
New Zealand (Coll. Brit. Mus.). 
ALPHEUS. 
Alpheus, Fabr. Ent. Syst. Suppl. p. 380, (1798); M. Edw. Hist. 
Nat. Crust. 1, p. 343, (1837); Dana, U.S, Explor. Exped. xiii, Crust. 
part i, p. 534, (1852), 
