190 DR. J. G. DE MAN ON THE PODOPHTHALMOUTS 
portion of its length to the distance between the extraorbital 
teeth, in the adult male, being as 30: 243. The upper surface, 
which is as broad anteriorly as posteriorly, is perfectly flattened 
and even, both longitudinally and transversely, the postero- 
lateral regions being only a little declivous. Except the deep 
grooves which separate the postfrontal lobes from one another, 
the cervical and branchiocardiac grooves, there are no grooves 
on the upper surface. The front is a little broader than 
half the distance between the extraorbital teeth, the pro- 
portion of the latter to the breadth of the front (measured 
between the eye-peduncles), in the adult male, being as 24:14, 
The minutely granulated front has its anterior margin widely 
emarginate in the middle, presenting therefore on each side a 
slightly prominent and small lobe; sometimes these lobes are 
minutely denticulated. The postfrontal lobes are separated from 
one another by rather deep grooves ; they are very prominent, 
and partially hide the front, when the carapace is viewed from 
above, though the lobes of the anterior margin are still visible in 
the groove between the external and internal lobes. The in- 
ternal lobes are a little broader than the external, and all are 
very denticulate and spinulous on their cristate anterior mar- 
gins; the upper surface of these postfrontal lobes is armed, 
moreover, with some small acute teeth or granules, arranged 
partly in transverse rows. The rest of the upper surface of the 
cephalothorax is smooth and shining, though minutely punctate 
when seen under a magnifying-glass; and, especially near the 
anterior and the lateral margins, in well-preserved specimens, a 
few very small tufts of short hairs are observed, which in most 
specimens, however, are rubbed off. The eyes are comparatively 
small. The lateral margins are nearly straight and parallel, 
terminating above the bases of the third pair of legs; behind the 
acute extraorbital tooth two acute teeth are found, of which 
the anterior is a little smaller than the extraorbital tooth, 
whereas the posterior is very small, Though the lateral margins 
are nearly straight, they appear, however, somewhat undulate, 
especially in the female, the anterior half of the margin being 
rather convex and the posterior half somewhat concave; the 
distance between the third pair of lateral teeth surpasses a little 
the distance between the extraorbital teeth. The sides of the 
upper surface do not present the oblique elevated lines which 
occur in most other species. The posterior margin of the carapace 
