CBTTSIACEA. 5gJ 



what dilated, and vertically flattened and compressed; the margins, 

 both of palm and fingers, spinulose, but the surface smooth, 'without 

 spines. But one ambulatory leg remains attached to the body (on 

 the left side) ; this is rather small and slender, and has the upper 

 margin of the merus, carpus, and penultimate joints spinulose, the 

 dactyl obscurely denticulated below. Colour light brownish pink 

 or yellowish. Length of the body to end of rosti'um nearly 6 lines 

 (12mii:im.); of a chelipede about 6i lines (14 millim.). 



The single specimen (which is, I think, a male) was obtained at 

 lie des Neufs, 15 fms. (No. 187), with Qalathea spinosirostris. 



The spmulation of the carapace, with the form of the chelipedes, 

 distinguishes it from all the species with which I am acquainted, 

 iv 7f •^^^*^"°® °^ supraocular spines will at once separate it from 

 the Oriental forms Munida gregaria (rabr.)=Jlf. sulrugosa, Dana, 

 M. japontea, Stimpson, and also from M. spinuUfera, described at 

 jp. 279 of this Eeport. 



MACEUEA. 



1. Alpheus obesomanns, Dana, 



A specimen was obtained at the Seychelles, 4-12 fms. (No. 194). 

 It has been already noticed at p. 287 of this Eeport. 



2. Alpheus edwardsii {Audouin). 



A specimen, in which the smaller chelipede is wanting, was ob- 

 tained at the Seychelles, 4-12 fms. (No. 194). I have already 

 referred to the distribution, sexual characteristics, and variability of 

 this species at p. 284 of this Eeport. 



3. Alpheus laevis, Bandatl. 



Of this widely distributed species specimens were collected at the 

 Seychelles, 4-12 fms. (No. 194) ; African or Eagle Island, 10 fms. 

 (No. 184) ; and Etoile Island, 13 fms. (No. 191) : most of these are 

 ova-bearing females. 



Specimens are in the British-Museum collection from the Eed Sea, 

 Gulf of Suez {R. MacAndrew) ; Gulf of Akaba (Major Burton); 

 El Tor (Major MacDonald) ; Daedalus Shoal (Lt.-Col. Play fair) ; 

 also Eed-Sea specimens received from the Godeffroy Museum, and 

 wrongly designated A. triciispidatus, Heller; also from Eodriguez 

 (H. H. Slater) ; Ceylon, Galle (Dr. W. Ondaatje) ; Samoa Islands 

 (Eev. S. J. Whitm.ee) ; and Fiji Islands, Matuka (H.M.S. ' Herald'). 

 There is in the collection a specimen of Alpheus from African or 

 Hagle Island, 10 fms. (No. 184), which for the present I refrain 

 from designating by a distinct specific name. It is evidently very 

 nearly allied to Alpheui collumianus, Stimpson*, from the Benin 



* Proc. Acad. Nat. Soi. Philad, p. 31 (1860). 



2o 



