TO INDIAN CAECINOLOGT. 381 



12R. Telphusa LrGUBETs, Wood-Mason. 



T. lugubris, ^Vood-Masoll, .louni. As. Soc. Bengal, vol. .\1. p. 197, pi. xii. ligs. 5-7 (1871). 



"Environs of Calcultn." Coll. Schlag'intweit, two specimens. (They are labelled 

 T. indica, and more probably came iVom the Himalayas.) Nepal, an adult femah> 

 {Dr. J. Scully). 



These specimens completely ai-'ree with Wood-Mason's excellent description. Tiie 

 species is closely allied to T. IncUca, but may be distino-uished as follows :— The post- 

 frontal ridge is not placed so far back on the carapace as in T. indica, and is some- 

 what wrinkled and ill-detined behind the inner canthus of the eye. The carpal spine is 

 blunt. The ischial line on tlie outer surface of the external maxillipedes is well marked. 

 The penultimate segmeat of the male abdomen has the lateral margins concave. The 

 ridge connecting the epibranchial tooth with the external orbital angle is nearly straight, 

 whereas in T. Indica it is curved. The colour, as in the other species, is a very dark 

 brown, and the epidermis readily peels otf in T. lugubris. 



The Nepal specimen lias the carapace somewhat more convex than indicated l)v 

 Wood-Mason, and seen in the other examples, but this is perhaps due to its beiuf au 

 adult female. It carries a large number of newly-hatched young attaclied to tiie 

 swimmerets under the abdomen. 



Disfribidion. North India : Sikkim, Nepal, and Khasi Hills ( Wood-Mason). 



129. Telphusa Masoxtan.x, n. sp. (PI. XXXVII. tigs. l-4t.) 



River Jumna, a series; North-West Provinces, four males {l>a//) ; " India," two dried 

 specimens [Brit. 3Tus.). 



The carapace is scarcely depressed. The postfrontal ridge is Avell defined towards the 

 sides, but the epigastric portions are wrinkled, and almost deficient behind the inner 

 canthus of the eye ; the mesogastric furrow is rather deep and slightly bifurcate 

 posteriorly. The cervical groove is broad and well defined, not interrupting the post- 

 frontal ridge ; a very distinct anterior and posterior pair of puncta arc present on the 

 gastric region adjoining the cervical groove. Both the epibranchial tooth and the 

 external orl)ital tooth are strongly developed. The branchial region of tlu; carapace is 

 swollen dorsally and laterally in its anterior portion, and numerous faint interrupted 

 crenulated lines run tninsversely along the whole margin. The frontal margin is 

 somewhat concave, and both it and the orbital margin are finely crenulated ; the orbits 

 are remarkably large and shallo-w . 



The chelipedes are^unequal, either the right or left Ijeing larger, and they are very 

 similar to those of T. lugubris, with the exception that the carpal spine is prominent and 

 acute. The external maxillipedes, and also the ambiilatory legs, are similar to those of 

 T. lugubris, but the ambulatory dactyli are rather more slender than in Wood-^Mason's 

 species, and the horny spinules \\ ith which they are armed arc much less prominent. 

 The penultimate segment of the male abdomen has the lateral margins concave, as in 

 T. lugubris, but the concavity is not apparent in very young individuals. 



T. Masoniaua is allied to T. lugubris, but on comparing it with that species the 



SECOKD SERIES. — ZOOLOGY, VOL. V. 55 



