194 A. Alcock — Carcinological Fauna of India. [No. I r 



Antennary flagellum considerably more than half the greatest 

 length of the carapace, fringed with some long silky hairs. 



Chelipeds very unequal ; anterior border of ischium and arm spinu- 

 late or spinate, both the other borders of the arm spinulate or granular - 

 upper and outer surfaces of wrist sharply granular, the inner angle of 

 the wrist prolonged into a stout spine ; the whole upper outer and 

 lower surfaces of the smaller hand sharply granular, with several rows 

 of enlarged spiniform granules, fingers of smaller hand fluted; the 

 larger hand and fingers are smooth, except for a granular patch quite 

 at the near end of the outer surface and extending a variable distance 

 along the upper border of the hand, and for a small patch of granules 

 at the base of the dactyl us. 



The upper border of the meropodites of the legs is usually sharply 

 spinate. 



Colours in spirit yellow, fingers dark brown. 



In the Indian Museum are 21 specimens, from Mekran, Karachi, 

 Bombay, Nicobars r and Malacca Strait. 



113. Pilumnus andersoni, de Man. 



Pilumnus andersoni, de Man, Journ. Linn. Soc, Zool., XXII. 1887-88, p. 59, 

 pi. iii. figs. 5, 6, and Zool. Jahrb. Syst., VIII. 1895, p. 552. 



Closely resembles P. longicornis from which it differs in the follow- 

 ing particulars : — 



(1) the carapace appears broader owing to the front being less 

 prominent : 



(2) the free edge of the front and the upper margin of the orbit 

 are nearly or quite smooth ; the lobes of the front are much less pro- 

 minent, the notch between them is not so wide aud deep, and the outer 

 angles are dentiform, not spiniform : 



( 3) the outer angle of the orbit is sharper r 



(4) the granular patch at the base and along the upper border of 

 larger hand is larger. 



In the Indian Museum are 5 specimens, from Mergui, Ceylon, 

 Karachi (and 5 from Gaspar Strait). 



114. Pilumnus sluiteri, de Man. 



Pilumnus sluiteri, de Man, in Weber's Zool. Ergebn. Niederl. Ost-lnd. II. 

 1892, p. 283, pi. i. fig. 2 : Ortmann, Zool. Jahrb., Syst., VII. 1893-94; pp. 436, 438. 



Pilumnus forskalii, de Man (nee Edw.), Archiv. fiir Naturges. LIU. 1887. I 

 p. 295, pi. xii. fig. 1. 



Carapace, legs and chelipeds (except the fingers) covered with a 



