TO IXDIAX CAECIXOLOGT. 399 



middle and distal end of the merus, and about the middle of the hand. The legs are 

 iincolouved. 



The larg-est male is G mm. long and 5 mm. broad, with the chelipede 10 mm. long; 

 the largest female is 5'S mm. long and 5 mm. broad, the chelipede 8'5 mm. long. 



The species is distinguished at once by its small size, and there can be no doubt that 

 the Martaban examples are adult. The nearest ally appears to be P. tridentata, Miors, 

 from Japan, in which, however, in addition to the difference in size, the median frontal 

 projection is much more prominent, and the carapace is punctulated. 



Genus Philyra, Leach. 



177. Philtea scabkiusctjla (Fabr.). 



P. scahriusculu (Fabr.), Bell, Trans. Linn. Soc. vol. xxi. p. 299 (1855). 



Pameswaram and Tuticorin, many specimens {Thurston). Abundant at Madras and 

 on the S. Indian coast generally {J. H. II.). 



There is considerable variation as regards the amount of tuberculation on the carapace ; 

 very commonly there is a smooth rounded area on the cardiac region, and a smooth 

 longitudinal area on each branchial region. On the post-gastric region the tubercles may 

 be absent, but they are usually present in this locality, and some of them may be larger 

 tliau those met with elsewhere. In young specimens the fingers are armed with more 

 prominent teeth towards the apices than in adults, and are also slightly setose. 



Dintribufion. E. Africa, Indian Seas, Malay Archipelago. 



178. PlIILYRA VERRUCOSA, n. sp. (PI. XXXVII. figS. 10-12.) 



Madras, an adult male [J. B. II.). 



This species is so closely allied to P. scahriuscitla that only the points of difference 

 between the two need be 2:)ointed out. The carapace is more convex, with deeper 

 branchio-cardiac grooves, and, excepting the surface of the frontal lobes, it is everywhere 

 uniformly covered with smooth, rounded tubercles, one of which in the centre of the 

 post-gastric area is larger than the others. The tubercles on the anterior half of tlie 

 carapace are smaller than those on the posterior half. The external orbital angle is 

 scarcely represented, while in P. scithrluscula it is prominent, and the front is nai-rower 

 between the eyes in our species. The small blunt lobe seen on the hepatic area in P. 

 scuhnnsculu is not present, but this surface is crossed oblicjucly by a continuous tuber- 

 culated line. The external maxillipcdes are uniformly granulated externally, including 

 even the exognaths, while in P. scahriuscnla they are almost smooth, there beino" at 

 most a few granules on the endognatli ; the cxognath is broader than the ischial joint 

 of the endognatli, and its outer margin is strongly convex, distinctly indenting the 

 lateral margin of the carapace ; in the longer known species the cxognath is decidcdlv 

 less convex. 



The chcliijedes are shorter and stouter in the new sjjecies, and with more numerous 

 but smaller tubercles on tlie merus ; the fingers are without small teeth or seta?. The 

 sternum is uniformly tuberculate, whereas in P. scabnuscula there are merelv lines of 



57*' 



