Report on the zoological collections made in the Indo-Pacific Ocean ...

;CRUSTACEA. 523Island, or lie des Roches, 13-20 fms. (No. 183), and a imall malefrom Darros Island, 22 fms. (No. 233).Dana's types were from tlie Hawaiian Islands ; hence this species,which was previously unrepresented in the Museum collection, isevidently distributed throughout the Oriental Kcgion.It appears to be very distinctly characterized by the slender andvery divaricate rostral horns, and the strong spiues of the pterygostomianregions and basal antennal joints. In the specimensbefore me, the carapace beneath the pubescence is obviously tuberculated,and it is not so broadly ovate as in Dana's figure ;as inthat figure, there are small lateral epibranchial and intcstiualspines.There is, I think, no sufficient reason for separating this form,even as a subgenus, from Chorilia.In a female from African or Eagle Islands, 10 fms. (No. 184), thecarapace is still narrower, less distinctly tuberculated, and hasscarcely any trace of the epibranchial and no intestinal spine ; thespines of the rostrum are longer, exceeding the carapace in lengththe spines of the basal antennal joints and pterygostomian regionsshorter (the latter subequal). This I wiU designate L,-ev^, var.tenuirostris. \^9. Naxia (Naxioides) petersii, Hihjendorf.A young specimen is in the collection, from Marie-Louise Island,17 fms. (No. 186).Two specimens of this species are in the British-Museum collectionwithout special locality {H.M.S. Samarang ' '). Dr. Hilgeudorf'sspecimen was from Mozambique.As I have elsewhere noted *, this species is very probably identicalwith the earlier described N. Jurta, A. M.-Edwards, from Zanzibar,10. Eurynome stimpsonii. (Plate XLVII. fig. A.)The carapace is of a rather narrow-pyriform shape ; the spines ofthe rostrum rather short, very slightly divergent, and shaped nearlyas in Eurynome aspera; there are usually two small spinules onthe front of the, gastric region, and always a strong spine on eachbranchial region. The surface of the carapace has besides severalbroadly dilated, laminate, fiattened expansions, which, when examinedwith a lens of sufficient power, are seen to be themselvesgranulated :— one (longitudinal) on the gastric, one (posteriorlyemarginate, and bearing a strong dorsal spine) on the cardiac, one(transverse) on the iutestinal, one on the hepatic, and four on thebranchial region grouped around the branchial spine ; also one onthe posterior margin of the caiapace their form will;bo best undei--stood by a reference to the figure. The postocular tooth or lobe isprominent and triangulate ;there is a small ridge or prominence on* Proc. Zool. Soc. 1882, p. 341.