1871.] .J . Wood-Mason— On Telp/msidce. 1 1) 3 



and continued nearly to the level of the last epibranehial tooth, 

 where it ends to appear again opposite the second tooth, whence it 

 passes to the edge of the post-frontal crest which it bnt faintly 

 indents. The post-frontal ridge is well marked and, between the 

 point at which its edge is notched by the passage across it of the 

 cervical suture and the anterior epibran chial tooth, is crennlated ; 

 the cardiac lobe is marked off from the branchial by two shallow 

 almost linear depressions on each side of the middle line, and in front 

 from the urogastric by a line curving almost concentrically with 

 the convexity of the cervical suture. The epigastric lobes are 

 slightly wrinkled or foveate anteriorly, and advanced beyond the 

 line of the post-frontal crest as in Paratelphusa spinigera, and sepa- 

 rated from one another by the mesogastric suture, which rapidly 

 bifurcates as it passes backwards, appearing as a short V-shaped 

 impression on the carapace, the space intercepted between the arms 

 of the V being the point of the narrow anterior prolongation of 

 the mesogastric lobe. 



The antero-lateral margins are inclined and armed, not counting 

 the blunt extra-orbital tooth with its curved external margin, each 

 with four acute, spiniform epibranehial teeth of which the most 

 anterior is the largest ; the rest are equal in size to, and equidis- 

 tant from each other ; from the last a short well defined keel, 

 obscurely cremated on its inner edge, passes backwards and inwards 

 on to the carapace which is marked with a few small straggling 

 tubercles along the line of the epibranehial spines. Front very 

 broad especially at base, punctate, finely granular and transversely 

 wrinkled, its free margin is bayed in the middle line, but not greatly 

 lamellar and projecting forwards over the epistomial region, as 

 in Paratelphusa sinensis, M.-Edw., and in P. spinigera. 



The inflected portion of the carapace is finely tuberculated ante- 

 riorly ; anterior pleural lobe distinct and almost devoid of tuber- 

 cles \ posterior pleural smooth, thickly granulated where it bounds 

 the anterior pleural. 



The anterior boundary of the epistoma is crenulated; its pos- 

 terior margin is notched on each side of the middle line from which 

 a long sharp process extends downwards between the palpiform 

 appendages of the external maxillipedes ; this process does not 



