1895.] 
271 
A. Alcock— Carcinological Fauna of India. 
The characters that distinguish this species are constant through¬ 
out the series, without any modification or variation. 
Greatest length of carapace in ovigerous female 
Do. breadth do. do. do. 
Length of chelipeds in ovigerous female 
... 15 millim. 
... 15 millim. 
... 52 millim. 
Fambrus ([Rhinolambrus ) petalophorus , n. sp. 
Carapace of the same general shape as in L. turriger, but broader 
posteriorly, where its breadth exceeds its length with the rostrum. The 
hepatic region is extremely well demarcated, not by its prominence, but 
by its almost vertical outer wall. 
The cristiform antero-lateral border, which runs from the angle of 
the buccal frame outside the limit of the hepatic region, is festooned by 
7 or 8 close-set thin teeth, and there is a strong upcurved spine at the 
postero-lateral angle. 
The postero-lateral border carries three teeth, the innermost of 
which is hardly less prominent than that at the postero-lateral angle: 
the posterior border is finely denticulated. 
The rostrum, the breadth of which is about -§- the greatest breadth 
of the carapace, is elegantly trilobed. 
The regions of the carapace are strongly elevated, and have the 
surface pitted or reticulated : in the middle line on the gastric region is 
a single erect conical spine, on the cardiac region two; and on either 
branchial region there is a spine. In front of the gastric spine are two 
spinelets, disposed transversely. 
The supra-orbital margin is strongly arched, and the infra-orbital 
lobe is cut into two elegantly crimped leaflets or petals. 
The post-ocular constriction is distinct. 
The chelipeds in the male are four and-a-half times the length of 
the carapace and rostrum : the arm is slender and subcylindrical, with 
a line of many spinules along both the inner and outer borders, a 
broken line of sharp tubercles along its upper surface, and a line of 
granules along its lower border, but is otherwise smooth and polished : 
the carpus has a few coarse spinules on its outer surface : the hand , 
though distinctly trigonal, is long and slender, but is enlarged at the 
far end; its inner and outer borders are irregularly and unequally 
laciniated, the teeth becoming larger and closer set towards the far 
end ; except for a line of beading along its lower border and an occa¬ 
sional spinule on its upper surface, its surfaces are smooth and polished : 
the movable finger has its broad base denticulated. 
The ambulatory legs are very slender and very short—only one- 
