202 COLLECTIONS FROM MELANESIA. 



branchial regions ; the margins of the rostrum are, however, 

 minutely denticulated, and the eyes do not project so much beyond 

 the orbits as in the latter-mentioned variety. There can be no doubt 

 that the two pass into one another by insensible gradations. 



The range of L. hoplonotus (so far as ascertained) is from Ceylon 

 eastward, through the Philippine Islands to the N.E. coast of Aus- 

 tralia, whence Mr. Haswell records it from Darnley Island, Cape 

 Grcnville, and Port Denison ; also from Albany Island and Port 

 Molle (H.M.S. 'Alert'). 



M. A. Milne-Edwards mentions its occurrence at New Caledonia. 



28. Lambrus (Parthenopoides) harpax. 



Lambrus harpax, Ad. 8f White, Zool. ' Samarangj Crust, p. 25, pi. vi. 



fig. 3 (1848) ; Haswell, Proc. Linn. Soc. N. S. Wales, iv. p. 450 



(1880) ; Cat. Austr. Crust, p. 32 (1882). 

 ? Lambrus (Parthenope) sandrockii, Haswell, t. c. p. 452, pi. xxvii. 



fig. 2 (1880) ; Cat. p. 30 (1882), var. 



An adult female bearing numerous ova is in the first collection 

 from Thursday Island, Torres Straits (No. 130), aud a small and 

 imperfect male from Port Molle (No. 93) ; also an adult and a smaller 

 male from Thursday Island, 3-4 fms. (No. 177) (second collection). 



Mr. Haswell mentions the occurrence of this species at Albany 

 Passage (H.M.S. ' Alert '). 



In the adult specimens the depressions separating the branchial 

 from the gastric and cardiac regions are wide and deep, and these 

 regions are convex and covered with low tubercles ; there is a deep con- 

 cavity on the postfrontal region ; the front itself is almost vertically 

 detlexed; the margins of tbe carapace are armed with about a dozen 

 oblong laminate teeth, which increase in size towards the postero- 

 lateral angles, and whose margins are themselves crenulated ; tbe 

 postero-lateral marginal spines are large and laciniated (i. e. each 

 bearing two or three smaller lateral spines or teeth). The chelipedes 

 are robust and more or less tubereulated ; arm strongly dentate on 

 its anterior margin and with two or three spines on its posterior 

 margin. Palm with a curved longitudinal series of larger rounded 

 tubercles on its inner surface ; the tubercles on its outer surface also 

 showing a disposition to arrangement in longitudinal series ; its in- 

 ferior margin thin-edged and granulated. Pingers dentated on their 

 inner margins, upper ringer with a high dentated crest. Ambulatory 

 legs compressed ; third, fourth, and fifth joints somewhat cristated. 

 above ; in the last pair the crests are more elevated and interrupted, 

 and there are two or three spines on the lower margins of these 

 joints. Length of the largest specimen (female) about 1 inch 2 

 lines (30 millim.), and greatest breadth (not including lateral bran- 

 chial spines) about 1 inch 1 line (28 millim.). 



The above description, although not exhaustive, will suffice (when 

 compared with that given by Adams and White in their work above 

 cited) to indicate the manifold differences between what I regard 

 as the adult aud young of this species. A specimen marked as the 



