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

202 COLLECTIONS FROM MELANESIA.branchial regions ; the margins of the rostrum are, however,minutely denticulated, and the eyes do not project so much beyondthe orbits as in the latter-mentioned variety. There can be no doubtthat the two i^ass into one another by insensible gradations.The range of L. hopUnotus (so far as ascertained) is from Ceyloneastward, through the Philippine Islands to the N.E. coast of Australia,whence Mr. Has well records it from Daruley Island, CapeGrenville, and Port Denison ; also from Albany Island and PortMoUe {H.M.S. ' Alert ').M. A. Milne-Edwards mentions its occurrence at New Caledonia.28. Lambrus (Parthenopoides) harpax.Lambrus harpax, Ad. Sf White, Zool. Smnarany,^ ' Crust, p. 25, pi. vi.fig. 3 (1848) ; Huswell, Proc. Linn. Soc. N. S. Wales, iv, p. 450(1880) ;Cat. Austr. Crust, p. 32 (1882).? Lambrus (Partbenope) sandrockii, Hasioell, t. c. p. 452, pi. xxvii.fig. 2 (1880) ;Cat. p. 30 (1882), var.An adult female bearing numerous ova is in the first collectionfrom Thursday Island, Torres Straits (No. 130), and a small andimperfect male from Port MoUe (No. 93) ;also an adult and a smallermale from Thursday Island, 3-4 fms. (No. 177) (second collection).Mr. Haswell mentions the occurrence of this species at AlbanyPassage {H.M.S. Alert '').In the adult specimens the depressions separating the branchialfrom the gastric ar^d cardiac regions are Avide and deep, and theseregions are convex and covered with low tubercles ; there is a deep concavityou the postfrontal region ; the front itself is almost verticallydeflexed ; the margins of the carapace are armed with about a dozenoblong laminate teeth, which increase in size towards the posterolateralangles, and whose margins are themselves crenulated ; tbepostero-lateral marginal spines are large and laciniated (i. e. eachbearing two or three smaller lateral spines or teeth). The chelipedesare robust and more or less tubcrculated ; arm strongly dentate onits anterior margin and with two or three spines on its posteriormargin. Palm with a curved longitudinal series of larger roundedtubercles on its inner surface ; the tubercles on its outer suiface alsoshowing a disposition to arrangement in longitudinal series ; its inferiormargin thin-edged and granulated. Pingers dentated on theirinner margins, upper finger with a high dentated crest. Ambulatorylegs compressed ;third, fourth, and fifth joints somewhat cristatedabove ; in the last pair the crests are more elevated and interrupted,and there are two or three spines on the lower margins of thesejoints. Length of the largest specimen (female) about 1 inch 2lines (30 miUim.), and greatest breadth (not including lateral branchialspines) about 1 inch 1 line (28 millim.).The above description, although not exhaustive, will suffice (whencompared with that given by Adams and White in their work abovecited) to indicate tbe manifold differences between what I regardas the adult and young of this species. A specimen marked as the