CRUSTACEA. 



By J. WOOD-MASON, F. Z. S., &c, 



DEPTiTTT SUPEEINTENDENT, INDIAN MUSEUM. 



CEUSTACEA CANCROIDEA. 

 CANCEOIDEA GRAPSIDICA. 

 'FamUj—TEZPHUSIDy^. 



Genus Telphtsa, Latr. 

 Telphusa edwardsi, J. W.-Mason. 



Telpkusa edwardsii, J. Wood-Mason, Journ. As. Soc, Bengal, vol. xl, pt. ii, 1871, p. 449, pi. xxvii. 



Carapace sparingly hirsute above, more thickly so on the pleural region, broadest 

 along a line dividing the anterior from the middle third of the meso-gastric region, 

 on each side of which the surface is raised into an oval areolet bounded in front by 

 the proto- gastric, behind and laterally by the branchial lobe, which in part bounds it 

 in front ; uro- gastric lobes distinct from the rest of the regions and from one another, 

 post-frontal ridge sinuous, coarsely wrinkled, ending about 2 mm. short of the 

 epibranchial teeth, slightly interrupted by the forward position of the epi-gastric 

 lobes ; these are rugose in front, deeply divided mesially and completely isolated 

 from the conterminous regions of the carapace by well-defined grooves ; meso-gastric 

 area distinct, sending forwards a narrow tongue between the proto- and epi-gastric 

 lobes ; branchial areas divided into anterior and posterior portions by broad smooth 

 deep oblique depressions ; the latter being scarcely distinct from the cardiac divi- 

 sion; the epibranchial teeth are continued backwards, outwards, and inwards as 

 raised denticulated crests, along the inner side of which runs a smooth furrow contin- 

 uous with the post-orbital furrow ; postero-lateral margins rugose behind the termin- 

 ation of the lateral crests, the rugosities being continued downwards and forwards 

 on to the inflected portion of the carapace; orbits and extra-orbital teeth finely 



