Carcinological Fauna of India. 135 
On the middle of the fourth abdominal tergum is a pair of large 
smooth tubercles, exactly like pearls, in the closest contact with one 
another. 
Carapace sub-cylindrical, longer than broad; the regions hardly 
indicated, though the branchial groove is fairly plain. 
Front triangular, deflexed, dorsally concave; its apex is in close 
contact with that of the epistome, and is surmounted by a horizontal 
spine similar to the larger spines of the surface of the carapace. Supra- 
orbital borders tumid. 
Antennal flagellum nearly as long as the carapace. 
Chelipeds equal, a little longer and stouter than the first three pair 
of legs, and not much longer than the carapace. The fingers are short 
and stout, and meet throughout their extent. 
The last pair of legs are slender rudiments, hardly longer than the 
basal joints of the other legs. 
Colours in spirit, milk-white; eyes deeply pigmented. 
A single small male from the Andaman Sea, 75 fathoms. The 
length of its carapace is 5 millim, 
Family III. DROMIIDA. 
Key to the Indian Genera and Sub-genera of Dromiide. 
IT. Front much as in Dynomene, broadly triangular, dorsally 
grooved, notched at tip. The sternal grooves of the 
female do not quite reach to the level of the genital 
openings on the 2nd pair of legs (third pereiopods) ws SPHHRODROMIA, 
II. Front usually cut into 3, sometimes into 2, teeth, rarely 
entire and triangular. The sternal grooves of the female 
reach at least as far as the level of the bases of the 1st 
pair of legs (2nd pereiopods) : — 
1. Third pair of legs, though shorter, not less stout 
than the first two pair; ending in a huge talon-like 
dactylus: fourth (last) pair of legs short and very 
‘slender. Carapace flat and pentagonal ... CONCHOECETES. 
2. Third pair of legs similar to, though Baristiniea 
shorter than, the forrth (last) pair. Carapace usn- 
ally convex :— 
i, Fourth (last) pair of legs shorter than the 
first two pair :— 
a. Legs smooth, the meropodites not 
specially dilated vee «. DromiA & Dromipia, 
b. Legs nodular, the meropodites not 
specially dilated a «.. CRYPTODROMIA. 
c. Legs nodular; the meropodites of the 
chelipeds and first or first two pair of 
legs dilated, petal-like .,, -. PETALOMERA 
585 
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