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

;522 COLLECTIONS FROM THE "WESTERK INDIAN OCEAN.tJircetis as figured by Von Martens, reacliing to the distal end of theinner margin, wliicli is toothed as in S. eri/thrcens; tliis joint has aconvex shining prominence at its outer and distal angle. The merusjointis less deeply excavated where it is articulated with the ischiumthan in S. eri/thranis, and, as already stated, there is a tooth in thenotch on the inner margin Avhere the carpus-joint is articulatedwith it, and its extero-distal angle is produced and acute ; the lobeon the inner margin of the exognath is acute. The chelipedes (inthe male) are of moderate length ; merus and carpus granulatedpalm granulated above, and with a longitudinal series of gi-anuleson its outer and inner surface ; fingers arcuated and meeting (inthe adult) only toward the apices, where they are denticuUited.The ambulatory legs are slender and decrease in length from thefirst to the last, the first pair being much elongated. Colour (inspirit) yellowish or purplish. Length of carapace (without rostrum)9 lines (19 millim.).6. Paramithrax (Clilorinoides) longispinus, De Haan,var, bituberculatus.An adult but small male from Darros Island, 22 fms. (No. 185),and two small males and a female obtained at Providence Island,19 fms. (No. 217), are referred to this species, which has evidentlya wide Oriental distribution.They are distinguished from P. longispimis as figured by De Haanmerely by having the lower (immobile) finger as well as the dactylusarmed with a tooth or tubercle on its inner margin in the males,and the upper margin of the palm straight and entire, not dentated;the spines of the carapace and legs are small. The anterior praeorbitalspine is more or less recurved, as in De Haan's figure of theJapanese type.From P. copiviigeri, Haswell, referred to in the first part ofthis Eeport, this species is distinguished not merely by the form ofthe chelipedes, but by the less elongated carapace and ambulatorylegs.7. Hyastenus (Chorilia) oryx, A. M.-Edw.Two females and two small males are in the collection fromProvidence Island, 19 fms, (No. 217).These specimens are of interest as showing the wide Orientaldistribution of this species, which had not previously been recorded,I believe, from the AVastern division of the Indo-Pacific Region. Ithas already been noticed in the first part of this Heport (p. 195).8. Hyastenus (Chorilia) ovatus,Lahalna ovata, Dana, Amer. Journ. Sci. Sf Arts, ser. 2, xi. p. 2G9(1851) ; U.S. Expl Exped., Crust, i. p. 92, pi. ii/. tig. 1 (1853).A small but adult female is referred to this species from Poivro