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

236 COLLECTIONS FEOM MELAUESIA.In two specimens from E. Australia, the smaller of which wasreceived with fishes of H.M.S. ' Challenger ' collection, the carapaceis coarsely punctulated in front, perfectly smooth ahove, andless convex, with scarcely any traces of the depressions indicativeof the cervical suture, or of the postfrontal crest and lateral teeth.These probably belong to a distinct species ; the larger hav^e beendesignated in MS. T. leicliardti.Specimens are in the British-Museum collection from the Philippines,R. Naga or Bicol {Caming), which belong to T. crassa or toa closely allied sjjccies ; in the male the larger chelipede has themobile finger arcuated, both are rather strongly denticulated ontheir inner margins, and have between them, when closed, a wideinterspace. These specimens were designated by White T. ohesa(in manuscript) ; but this name has been applied by Prof. A. Milne-Edwards to a very nearly allied form from Zanzibar, which differsapparently only in having an even more distinct postfrontal crest,and yet more strongly arcuated and dentated fingers to the largerchelipede. If distinct, the Philippine examples may be designatedT. cumingii.It is worthy of note that although Milne-Edwards in his descriptionsays there exists no postfrontal crest in T. crassa, someindications of one appear in the figure. His species may, however,be identical with the one here designated T. leicliardti, in whichcase the specimens I name T. crassa must receive a new specificappellation.79. Gelasimus signatus, Hess.A series of specimens is in the collection, of both sexes and ofdifferent sizes, from Port Curtis, some of which were collected at7-11 fms. (Xo. 85).These examples agree with the description and figure of Hess * innearly every particular, and there can be no doubt of their identitywith his species ; but the margins of the somewhat triangular, flat,inferior face of the arm are minutely granulated, and can scarcelybe described as furnished " with two rows of pearl-shaped tubercles,"as stated by Hess, whose specimens were from Sydney.There are in the collection of the British Museum specimens fromSwan lliver (Driiig), which I regard as belonging to this species.In the largest, the tooth or lobe of the middle of the inner marginof the lower finger, which is generally very characteristic of thisspecies, is not developed. These specimens were referred by my predecessor,Mr. Adam White *(, to 6r. forceps, M.-Edwards ; but thatauthor says that the larger chelipede in G. forceps is smooth, andthe merus-joints of the ambulatory legs appear to be even broaderand more dilated than in G. signatus.1^0 specimens had been seen by Mr. Haswell (who regarded the* Archiv f. Natiirgeschichte, p. 146, pi. vi. fig. 6 (1865).t List Crust. Brit. Museum, p. 36 (1847).