CKUSTACEA. 647 



also has a straight posterior margin to the carapace, but the postero- 

 lateral angles are not prominent, aad the cheUpedes are of very 

 different form ; these characters will also apply to P. carinata, BeU, 

 and another apparently undescribed species in the Museum collec- 

 tion from Penang (Br. Cantor), which is allied to P. carinata, but 

 has a more granulated carapace, a distinctly tridentate front, the 

 lateral margins of the carapace bounded by a sharp cristiform line 

 marked at intervals by small granuliform teeth, and much slenderer 

 chelipedes, the palms of which are not distinctly granulated. This 

 species, which only differs from Pseudopkilyra in its less prominent 

 front, I win designate as Philyra rudis. 



68. Pseudophilyra polita. (Plate XLIX. fig. B.) 



In this little species the carapace is subrhomboidal, but (with the 

 front) much longer than broad, slightly sinuated at the hepatic 

 regions ; the posterior margin nearly straight, but without promi- 

 nent postero-lateral angles, the antero-lateral margins with a series 

 of very distinct graaules, which is continued for a short distance 

 along the postero-lateral margins ; the posterior margin is defined 

 by a minutely granulated line ; the frontal or cephalic region is very 

 prominent, the front obscurely trilobate ; the median lobe distinct 

 and slightly deflexed, but the lateral lobes nearly obsolete ; the 

 dorsal surface is *polished, and only very minutely punctulated. 

 There is no distinct thoracic sinus, but one or two tubercles near 

 the base of the chelipedes. The postabdomen (in the male) has all 

 the segments (except the first and last) coalescent ; the eyes are 

 very small and lie well within the nearly tubular orbits, which 

 have an external fissure and an internal hiatus for the reception of 

 the small antennse. The outer maxUlipedes have the merus as long 

 as or rather longer than the ischium-joint, acute at its distal ex- 

 tremity, near to which its margins are granulated ; the exognath 

 broad, with its outer margin somewhat arcuated and its distal end 

 obtuse, the margins granulated, except towards the base. The 

 chelipedes are rather short and somewhat triquetrous, with the 

 margins very strongly granulated, as are also the upper and the 

 anterior faces toward the base ; on the inferior surface of the 

 arm the granules are smaller and more crowded ; palm and wrist 

 nearly smooth ; the palm subcristate on its upper and granulated 

 on its lower margia ; fingers about as long as the palm, slightly 

 incurved at the tips, with a slight hiatus between them when closed. 

 Ambulatory legs with the merus-joints more or less distinctly 

 granulated on their lower margins. Colour (in spirit) yellowish 

 white. Length of the only specimen nearly 4 lines (8 miUim.) ; 

 breadth rather over 3 lines (7 miUim.), which is also the length 

 of the chelipede when extended as far as its conformation will 

 allow. 



A male is in the collection from Poivre Island or lie des Eoches, 

 dredged in 13-20 fms. (No. 183). 



2ir2 



