204 COLLECTION'S FROM MELANESIA. 



Shark Bay (H.M.S. ' Herald ') ; the enialler specimen, which is 

 referable to the variety I have designated Icevimana, is not pitted 

 at all, and the carapace is granulated only on the posterior part of 

 the cardiac region, on the elevated parts of the branchial regions, 

 and on the posterior and postero-lateral margins. 



Mr. Haswell records a variety from Port Jackson which has the 

 carapace ornamented with numerous small circular brown spots. In 

 the specimens I have examined the carapace is generally uniformly 

 pinkish or whitish ; but in the largest male from Thursday Island it 

 is whitish, with a few large blotches of brownish pink on the gastric 

 and branchial regions and posterior margin. 



31. Gonatonotus pentagonus. 



Gonatonotus pentagonus, Adams $- White, Proc. Zool. Soc. p. 58 

 (1847); Zool. H.M.S. ' S^nnarang, 1 Crust, p. 33, pi. vi. ficr. 7 

 (1848); Miei-s, Proc. Zool. Soc. p. 29 (1879); Haswell, Proc. 

 Linn.' Soc. N. S. Wales, p. 455 (1880); Cat. Austr. Crust, p. 38 

 (1882). 



Two very small females are in the collection from Thursday Island, 

 4-6 fms. (No. 130), first collection, length little over 3 lines 

 (7 millim.) ; and a somewhat larger male from the same locality, 

 3-4 fms. (No. 177), second collection. The largest specimen in the 

 Museum collection, a male from near Billiton Island, in the Javan 

 sea, is about 6 lines (nearly 13 millim.) in length. Mr. Haswell 

 records this species from Port Denison ; the typical example of 

 Adams and "White was from Borneo. 



Gonatonotus crassimanus of Haswell is a very nearly allied but 

 apparently well-characterized species from Port Jackson, differing, 

 as its author notes, in its more deeply -cleft rostrum and in other 

 points. 



32. Euxanthus huonii (Lucas). 



A male from Clairmont, east coast of Australia, obtained from a 

 coral-reef (No. 151), belongs here. 



Mr. Haswell mentions (' Catalogue,' p. 47) its occurrence at Cape 

 Grenville. 



M. Alph. Milne-Edwards remarks * that Euxanthus sculptilis, 

 Dana, should perhaps not be distinguished from Eu. huonii. If the 

 two species are to be united, Dana's specific name will, I believe, 

 have priority ; but I prefer to regard them for the present as dis- 

 tinct. In Eu. huonii, as described and figured by A. Milne-Edwards, 

 and in the specimen of the 'Alert' coDection, the black coloration 

 of the fingers extends along the outer surface of the palm ; no trace 

 of this is apparent in Dana's figure of his Eu. sculjjtilis, nor in two 

 specimens in the British-Museum collection, one of which is from 

 the Philippine Islands and designated, I think, by M. A. Milne- 

 Edwards Eu. huonii, the other from Trinity Bay, N.E. Australia ; 

 both I refer, at least provisionally, to Eu. sculptilis. 



* Nouvelles Archives du Museum, i. p. 291 (1865). 



