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

CRUSTACEA. 285without or has only a rudimentary spine at base ; it narrows somewhatto its apex, which has a small spinule at its outer angle. Thelarger chelipede (which may be either the right or left) has a massivehand, which is rounded at its proximal end, notched above andtoothed below, just behind the bases of the fingers ; on the outerand inner surface of the palm, just below the incision in the uppermargin, is an irregular shallow depression, that on the inner surfacebeing somewhat of a triangulate and that on the outer surface of aquadrangula,te shape ; an impressed line, which forms the posteriormargin of the depression of the inner surface, passes obliquely downwardto the lower and proximal margin, and upward over therounded superior margin, whence it is prolonged in a nearly straightline along the upper and outer surface to the rounded base of theupper margin : this line is sometimes nearly obsolete ; the mobilefinger is rounded and subcarinated above, and is armed on its innermargin near the base with a very prominent rounded tooth or lobe,which fits into a deep pit in the lower (immobile) finger ; the smallerchela is slender (in the typical form), without notches, teeth, orsulci ; the second joint of the carpus of the second leg is usually alittle shorter than the first, the three last joints short, the fifth alittle longer than the fourth.In some specimens the lobe or tooth immediately behind thenotch on the upper and lower margins of the large chela is roundedor subacute, in others it is acute.Eight specimens (males and females) are in the first collectionfrom Port Curtis, 0-11 fms. (No. 92), one (male) from Port Mollebeach (Xo. 9o), and two females from Port Dcnison, 4 fms. (No. Ill);a small specimen (No. 123) is without special indication of locality.In the second collection are two small specimens from ThursdayIsland, 4-5 fms., a female from Dundas Straits, 17 fms. (No. 161),and an adult female from the beach at Port Darwin (No. 176).There are, besides, specimens in the British-Museum collectionfrom other localities as follows :—North Australia (Dr. J. R.Else]/), Port Essington and Rockhampton {Oodcffroy Museumas A. brevirostn's, M.-E.). Also from the lied Sea (Br. C.Heller); Gulf of Suez {JR. MacAndreiu) ; Egypt (J. Burton);Zanzibar {Dr. KirTc) ; Seychelles {Dr. E. P. Wright) ; Karachi{Karachi Miiseum) ; Ceylon {E. W. H. Holdsworth) ; Indian Ocean,Philippine Islands, Jiohol {Cuming) ; Japan, Katsura {Copt. U. C.St. John, li.N., the specimens I formerly designated A. hisincisus,De Haan) ; New Hebrides {J. MacgilUvray) ; Eiji Islands, Nairai{H.M.S. 'Hercdd'); Samoa Islands, Upolu {Eev. S. J. Whitmee): Tahiti {Mus. Godeffroy, as A. pacijicus, Dana) ; SandwichIslands {W. H. Pease). Specimens from the island of Trinidad{li. J. Lechmere Guppy) and the west coast of Central America{Capt. Dow) seem to be scarcely specifically distinguishable *.The males may be distinguished from the females by the form of* The series of specimens in tbe British-MuBeum coUeclion, extensive thoughit be, does not fully exhibit the ascertained range of this species. According to