312 DE. W. T. CALMAN ON EIVEE-CEABS 



their length than in P. aruana. Continuation of cervical groove on under surface 

 of carapace faintly marked. 



Eyes small, the peduncles narrowing distally. 



Merus of chelipeds rugose on its upper edge, with a subterminal ridge, but no distinct 

 spine ; its lovFer and inner edges smooth. Tooth on inner angle of carpus sharp, but not 

 spiniform, accompanied by a small blunt tubercle. Smaller chela of male and both 

 chelae of female with the fingers shorter and stouter than in P. aruana. Larger chela 

 of male with the palm slightly swollen, the interdigital lobe on its outer surface not 

 prominent, and the fingers gaping a little at the base. 



Text-figure 13. 



ParathelpJmsa [Liotelphusa) plana. Holotype, cJ , x 1|. 

 Above, the larger chela and the abdomen, on same scale. 



Walking-legs relatively short and stout, with a blunt subterminal tooth on upper 

 edge of merus. 



Abdomen of male broader than in any specimen referred to P. aruana, with the 

 sixth somite parallel-sided, little broader than long, and slightly longer than the telson, 

 which is linguiform, with slightly convergent sides. 



Holotype. Male, Reg. No. 1914. 3. 12. 4 in the British Museum. 



Bemarks. Although the two specimens are probably not fully adult, and the characters 

 of the male abdomen and chela are therefore not to be relied on, the flattening of the 

 carapace, the complete disappearance of the epibranchial tooth, and the small size of 

 the eyes give this species an aspect very different from that of any other with which it 

 might be compared. 



