150 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
side, from these triangular internal orbital angles by a small 
emargination, and is scarcely sinuated in the middle. Only a 
trace of the usual mesial frontal furrow is visible. 
As already observed, the lateral margins are scarcely arcuate. 
The antero-lateral margins are a little shorter than the postero- 
lateral and armed with three acute teeth. The first tooth, or 
external orbital angle, is rather acute and prominent, and about 
as large as the two following teeth together; the second tooth, 
only half as large as the first, is acute and directed straight 
forward, and the third is the smallest of all and also acute. The 
antero-lateral teeth are separated from one another by rather 
deep, though narrow, incisions. The external margin of the last 
antero-lateral tooth is prolonged backward, as a minutely granu- 
lated line defining the postero-lateral margin. 
The external antenne are short, scarcely reaching to the 
external angles of the orbits; their peduncle occupies the 
internal canthus of the orbits. The first or basal joint scarcely 
reaches the internal orbital angle, the second is the longest of 
all, and the third is again a little shorter than the second. The 
internal suborbital lobe is small and little prominent. The 
inferior margin of the orbits is minutely crenulate and does not 
unite with the external orbital angle, so that the orbits are 
not completely closed externally, as in the genera Metaplaz, 
Cyclograpsus, &c. The pterygostomian regions and the inflected 
sides of the cephalothorax are covered with some small granules 
and are a little hairy. The epistome is short and enlarged; the 
minutely granulated anterior margin of the buccal cavity is 
broader anteriorly than posteriorly, and its lateral margins 
are arcuate, and being slightly emarginate on each side of 
the middle, it presents three rounded lobes. The external 
maxillipeds are a little gaping; the ischium-joint is scarcely 
twice as long as broad, its internal margin is slightly convex, its 
external slightly concave. The merus-joint is a little shorter 
than the ischium-joint and strongly auriculated, the external 
distal angle being much prolonged transversely outwards. The 
palpus is inserted on the anterior margin of the merus-joint, its 
distance from the obtuse internal angle being a little less than 
its distance from the rounded external angle; between the point 
where the palpus is inserted and the obtuse internal angle, the 
anterior margin of the joint is slightly emarginate. The exopodite 
(exognathe, A. M.-Edw.) is extremely enlarged, being much 
