1898.] A. Alcock — Carcinologieal Fauna of India. 135 



60. Polycremnus ochtodes, (Herbst) Gerstaecker. 



Cancer ochtodes, Herbst, Krabben, I. ii. 158, pi. viii. fig. 54 : Fabricius, Ent. 

 Syst. II. 455, and Suppl. p. 337. 



Galene ochtodes, Adams and White, Samarang Crast. p. 43, pi. x. fig. 2. 



Polycremnus ochtodes, Gerstaecker, Archiv. fur Naturges. XXII. 1856, p. 121 : 

 A. 0. Walker, Journ. Linn. Soc, Zool., XX. 1886-90, p. 110 : Henderson, Trans. 

 Linn. Soc, Zool., (2) V. 1893, p. 359. 



Carapace oval-pentagonal, its surface smooth, a little lumpy owing 

 to the broad shallow depressions that somewhat indistinctly separate 

 and to a certain extent subdivide the regions. 



All the borders are of about equal length : the antero-lateral is 

 divided into four rounded deep-cut lobes, decreasing in size from behind 

 forwards, and is continued beneath the slightly tumid lobe of the 

 orbital angle to the angle of the buccal cavern : on the postero-lateral 

 border just behind the junction with the antero-lateral are usually a 

 few granules. 



The front projects horizontally forward beyond the orbits and 

 consists of two unguiform lobes separated in all their extent by a deep 

 narrow groove : it is a distinct rostrum. 



The chelipeds are unequal, most markedly so in the male. The 

 upper border of the arm is elegantly cut into teeth or pisiform or pearl- 

 like tubercles : two similar tubercles stand, one below the other, at the 

 inner angle of the wrist, and the upper and outer surfaces of the wrist are 

 more or less covered with papule-like or pustulous tubercles : the upper 

 border of the hand, and of the basal half of the finger bears a row of 

 pisiform tubercles, and there are numerous pustulous tubercles on the 

 upper surface and on the proximal part of the outer surface of the 

 "hand : fingers sharp pointed. 



The legs are smooth, but the upper border of the meropodites of 

 all, or of the first three pairs, is distantly serrate or spinulous : the 

 dactylus and the neighbouring part of the lower border of the propodite 

 is furred. 



Colours in spirit leaden grey, or yellowish with livid markings. 



In the Indian Museum are 2 specimens from the Madras Coast and 

 one from Penang. 



Halimede, De Haan. 



Halimede, De Haan, Faun. Japon. Crust, p. 35 : Dana, Amer. Journ. Sci. and 

 Arts, (2) XII. 1851, p. 125, and U. S. Expl. Exp. Crust, pt. I. p. 149. 



Closely allied to Polycremnus, having the same form of male 

 abdomen. 



The genus is not represented in the Indian Museum. 



