190 DE. J. a. DE MAK ON" THE PODOPHTHALMOtJS 



portion of its length to the distance between the extraorbital 

 teeth, in the adult male, being as 30 : 24^. 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 j 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 



