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

;516 COLLECTIONS FROM THE AVESTERN INDIAN OCEAN.Glorioso Islands. Beach and reef at low water, May 1882 (No. 220)7-10 fnis., sand and mud, May 1882 (No. 219).Mozambique. Beach, between tide-marks, May 1882 (Nos. 224, 22o,227) ;specimens found in the interior of Tridacna-sheWs (No. 237).In the systematic list of the species which follows, 104 speciesand varieties are enumerated from the African subregion, besides13 which were collected at Singapore and are not included inthis <strong>Report</strong>; of these, 16 species and 6 varieties are described asnew to science. 38 species and varieties are indicated as new tothe African subregion ; but several of the new varieties may notimprobably have been already recorded by previous writers under thetypical designation of the species.Little need be said with regard to the geographical distributionof the species, since the great majority, excejit in the groups Oxyrhynchaand Oxystomata (which arc richest in undescribed forms),are common in the Indo-Pacific region*, but confined, with fewexceptions, to that area of distribution. Such exceptions are Grapsusmacidafus, LiolopJius 2}^(i'nissimus, Alplieus edwardsii, and Gonoclitcti/Iuschiragra, which extend into the Atlantic region ; alsoTludamita Integra and Ccdappa gallus, var. hicornis (if the distributionof the variety be included in that of the ty])ical form). Itis not necessary to rejieat here what has been already noted on theaffinity of the Crustacean fauna of this subregion or district withthat of the West Indies f.List of the Species, shotuing theirGeograj^hiccd Range.[N.B. The species and varieties distinguished by an astensk are those whichI believe to be now recorded for the first time from the Mascarene subregionand the Eastern coast of Africa. The term "Oriental Eegion " denotes thatthe species ranges irom the African coast or islands adjacent eastward atPODOPHTHALMIA.D E C A P D A.BRACnriTRA.*Ac7icetts leeviocidis, sp. n. Seychelles.Camiioscia retusa, Latreille. Mozambique ;Oriental Region.least to one of the island-groups of the Pacific Ocean. At tlie end of tliis<strong>Report</strong> a table is appended, showing the distribution of the species on theEast-African coast and the islands belonging to the same geographical subregion.]* Prof. F. W. Hutton, in a recent article on Zoological Geography, adoptsthe terms Province and District for marine geographical divisions in contradistinctionto the terms Region and Subregion, which he restricts to the landdivisions {lide 'New Zciiland Journal of Science,' i. p. 190, footnote, 1882).t Proc. Zool. Soc. p. 539 (1882).