1896.] A. Alcock — Carcinological Fauna of India. 239 



68. Philyra scabriuscula, (Fabr.) 



Seba, III. pi. xix. %s. 10, 11. 



? Cancer cancellus, Herbst, Krabben, I. ii. 94, pi. ii. fig. 20. 



Leucosia scabriuscula, Fabricius, Ent. Syst. Snppl. p. 349 : Latreille, Hist. 

 Nat. Crust, et Ins. VI. 116. 



Philyra scabriuscula, Leach, Zool. Miscell. III. p. 22 : Desmarest, Consid. 

 Crust, p. 167 : Milne Edwards, Hist. Nat. Crust. II, 132, pi. xx. figs. 9, 10 : Bell 

 Trans. Linn. Soc. Vol. XXT. 1855, p. 299, and Cat. Leucos. Brit. Mas. p. 14: 

 Heller, 'Novara' Crust, p. 70 : de Man, Notes Leyden Mus. III. 1881, p. 126: 

 Lenz and Ricbters, Abh. Senck. Ges. XII. 1881, p. 425 : Muller, Verb. Ge?. Basel 

 VIII. 1886. p. 473: de Man, Journ. Linn.. Soc, Zool., Vol. XXII. 1888, p. 201: 

 J. R. Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 399. 



The epistome and the subhepatic regions form a dorsally-flattened, 

 marginal 1 J- crenulate, rounded lobe, which is separated from the anterior 

 curve of the carapace by a groove and projects far be^^ond the front, 

 like the lower jaw of a bulldog. 



The carapace is discoidal, with the margin beaded and the dorsal 

 surface very variably ornamented with vesicular granules visible to the 

 naked eye: these, however, never completely cover the carapace, and are 

 rarely altogether absent, but are generally confined to the outer part of 

 the br-anchial regions and to the branchio-cardiac grooves, which are 

 broadly defined. The hepatic regions also are defined, by a slio-ht 

 marginal indentation and by a dorsal wrinkle. 



The front is divided into two lobes by a deep broad groove, and the 

 roof of the orbit is deeply fissured, so that the external orbital angle is 

 acutely emphasized. 



The edges of the thoracic sterna and the basal edge of the abdomen, 

 as well as the greater part of the pterygostomian regions, are ornament- 

 ed with polished granules; but the surface of the external maxillipeds 

 is perfectly smooth, except in the female, where there are traces of 

 granulation on the endopodite. 



The chelipeds in the adult male are about 2J, in the adult female 

 about If, times the length of the carapace : the arms bear rows of 

 beadlike granules running along the upper and inner surfaces but 

 fading away distally ; the under surface of the arm is almost smooth : 

 the inner edge of the wrist has a single row, and the inner edge of the 

 hand several rows, of minute vesicular granules, which are hardly 

 visible to the naked eye even in the male, and are obsolescent in the 

 female. The hands are twice as long as broad : the fingers, although 

 they meet only at their extreme tip, are denticulate all along the 

 opposed edges ; the mobile finger is nearly as long as the hand. 



The legs are slender and smooth, except for a line of microscopic 

 granulation along the under surface of the meropodites. 



