1895.] 
A. Alcock —Carcinological Fauna of India. 
289 
Carapace hexagonal: the spines of the rostrum far apart: lateral 
angles of the carapace in the form of stout outstanding spines the tips 
of which are turned forwards : a pair of sharp tubercles in the middle 
line behind the rostrum—these being tufted with hairs. 
Chelipeds stout, about twice the length of the carapace and ros¬ 
trum, finely granular, and longitudinally grooved. 
A single specimen of this small species, from the Malacca Straits, 
is in the Museum Collection. 
Appendix to sub-family AC ANTHONYCHINMil. 
MFNjFTHIOPS, n. gen. 
Closely allied to Mensetlnius. 
Carapace pyriform, its surface smooth beneath a pubescent cover¬ 
ing. The rostrum consists of two acute slender spines of moderate 
length, which are in the closest contact throughout. 
The eyes, which are movable forwards but not retractile, are in 
great part concealed beneath a large, very conspicuous, laminar supra¬ 
ocular spine. No post-ocular spine. [A spinule is present on the 
ventral aspect of the hepatic region of the single species.] The basal 
antennal joint is broad ; and the mobile portions of the antennae are 
visible, from above, on either side of the rostrum. 
The external maxillipeds have the merus as broad as the ischium, 
and the palp inserted at the antero-internal angle of the merus. 
The ambulatory legs, of which the first pair are longer than the 
rest, have strongly recurved prehensile dactyli. 
The chelipeds in the female (male unknown) are not enlarged. 
The abdominal segments in the female appear to be all distinct. 
This genus has a superficial resemblance to Oregonia , Dana ; but 
in Oregonia there is a large post-ocular spine, quite distinct from the 
hepatic angle, and the eyes are said to be retractile against this spine. 
Mensethiops bicornis, n. sp. 
Body and legs tomentose, with additional long scattered setae. 
Carapace pyriform, somewhat Achseus -like in shape, there being 
a slight constriction behind the eyes, and another slight constriction 
behind the hepatic regions : the gastric and cardiac regions very promi¬ 
nent, the branchial regions prominent: the surface, when denuded, 
smooth, except for a granular ridge on the pterygostomian regions ; the 
hepatic regions are laterally rather prominent, and carry a small spinule 
