47 



In larger specimens (carapace about three-quarters of an inch in diameter) 

 the carapace has become closely and finely granular, with the spines persistent 

 only in definite situations, somewhat as in Miers' figure and description, (loc. cit). 



In larger specimens (carapace two and a half raches in diameter) the cara- 

 pace has become coarsely and bluntly granular, without any spines, except a few 

 quite anteriorly in the neighbourhood of the hepatic region. 



In the largest specimens (carapace three to nearly four inches in diameter) 

 the carapace is in places quite smooth, the only spines present being two external 

 to the eye, and one on the front margin of the hepatic region. 



In contrast with the carapace, the spines on the abdominal sterna of the 

 male show no signs of effacement with age. 



The colours also seem to vary with age. In young males taken by myself 

 the carapace was red, with or without red points, and the legs were red and 

 white in alternate bands. In adults of both sexes taken by Dr. A. R. S. Ander- 

 son the upper surface of the carapace was bright orange, the legs were banded 

 alternately dark and pale orange, and the under surface was bluish. 



Encephaloides, "Wood-Mason. 



Encephaloides, Alcoct, J. A. S. B. Vol. LXIV. pt. 2, 1895, p. 186. 



Carapace, owing to the remarkable inflation of the branchial regions, heart- 

 shaped and posteriorly as broad as long (rostrum included) : the branchial regions 

 rising up and meeting across the carapace in the middle line. Rostrum simple, 

 shaped like the beak of a bird. Eyes retractile against the sides of the carapace : 

 a small pre-ocular and post-ocular spine, but no definite orbit. 



Basal antenna-joint slender throughout but flat and fused with the rostrum : 

 the antennje visible, dorsaUy, from the base of the second joint. 



The merus of the external maxillipeds is produced antero-extemally to 

 form a foliaceous lobe which covers the greatly produced efferent branchial 

 orifice ; it is thus both longer and much broader than the ischium. 



Abdomen in the male seven-jointed : in the female the fourth, fifth and 

 sixth segments, though distinctly recognizable, are firmly fused together. 



Chelipeds in both sexes slender. Legs long and slender. 



Only eight branchiae on each side. 



Encephaloides Armstrongi, Wood-Mason. 



Encephaloides armstrongi, Wood-Mason, Ann. Mag. Nat. Hiat. March, 1891, p. 259 : Aloook, J. A. S. B., Vol. 

 LXIV. pt. 2, 1895, p. 187 : 111. Zool. Investigator, Crust, pi. xix. figs. 2, 2a. 



Carapace heart-shaped : its greatest breadth is equal to its length with the 

 rostrum : its surface in the adult is nodular or pustular, in the young coarsely 



