270 
A, Alcock —Carcinologieal Fauna of India. 
[No. 2, 
die line, one on the cardiac region in the middle line, and one on each 
branchial region : there is sometimes a little spinnle in front of the gas¬ 
tric spine, and one in front of either branchial spine ; and on the pos¬ 
terior border, in the middle line, are two divergent spines directed back¬ 
wards. The rostrnm is broad, concave between the eyes, somewhat de- 
flexed, and may be described as trilobed near the tip—since it is there 
suddenly truncated and continued in the middle line only. 
There is a distinct post-ocular constriction, and the hepatic regions 
are well-defined laterally. 
The chelipeds are long slender and rugose : the arm is cylindrical, 
and the palm subcylindrical, becoming enlarged and trigonal near the 
fingers : in the male the chelipeds are from 4^ to 5| times the length of 
the carapace and rostrum, in the female they are but to 3| times this 
length. 
The ambulatory legs are long, very slender, and perfectly smooth. 
In the Museum collection are numerous specimens from the Anda¬ 
mans, from the Madras coast, and from off Ceylon at 32 to 34 fathoms. 
There are undoubtedly two sorts of males : one sort resembling the 
female in having the chelipeds comparatively short, the other sort hav¬ 
ing very long chelipeds. 
Lambrus ( Rhinolambrus ) cybeiis , n. sp. 
This species closely resembles L. turriger, from which it differs 
only in the following characters :— 
(1) the regions of the carapace are all more elevated, and on the 
cardiac region—one behind the other, in the middle line— 
as well as on either branchial region, are two very large 
semi-erect spines of equal size; while in the middle of the 
granular posterior border is a single spinule : 
(2) the surface of the carapace, besides being granular, is very 
evenly and regularly pitted or reticulated: 
(3) the rostrum, which is nearly one-third the greatest breadth 
of the carapace, is more distinctly trilobed : 
(4) the chelipeds (which in females and young males are only 
3J to 3J times the length of the carapace and rostrum), 
though of the same general slender proportions as in L. 
turriger , have the hand distinctly trigonal throughout, 
and the arm and hand armed with sharp laciniated spines 
on the upper aspect. 
A young male from off Ceylon, 34fms., and two probably half-grown 
males, and an ovigerous female, from off the Andamans, 41 to 86 fathoms. 
