1900.] A. Alcock — Car etiological Fauna of India. 339 



38. Pinno teres purpureas, n. sp. 

 Closely related to P, palaensis, burger. 



The description applies to the female. 



Carapace and appendages smooth, polished, nude. Carapace 

 transversely oval, strongly convex, the regions not well denned. De- 

 flexed part of front broadly and indistinctly triangular, Eyes very 

 small, but well pigmented. 



Dactylus of external maxillipeds slender and inconspicuous, placed 

 far back on the inner (flexor) edge of the propodite. 



Chelipeds and legs slender, the chelipeds being little stouter 

 than the legs and about the same length as the first pair of legs. The 

 movable finger is not much more than half the length of the upper 

 border of the palm. 



The third pair of legs are the largest of all, their meropodites and 

 carpopodites being longer than those of the first two pairs and nearly 

 twice as long as those of the 4th pair. The dactyli of the 3rd and 

 4th pairs are several times the length of those of the first two pairs, 

 and the dactylus of the 3rd pair exceeds that of the 4>th j>air. Though 

 the 4th pair have a long dactylus their total length is not greater 

 than that of either of the first two pairs. 



Colour either hyaline with numerous minute specks of bluish-black 

 pigment, or the specks may be sufficiently numerous to make the whole 

 animal nearly black. 



From an Ostrsea from the Andaman Islands. 



Carapace 7 millim. long and 9 millim. broad. 



39. Pinnoteres parvulus, Stimpson, de Man. 

 Pinnotheres parvulus, Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 108 : de Man, 

 Journ. Linn. Soc, Zool., XXII. 1887-88, p. 105, and Arcliiv fur Nat. L1II. 1887, i. 

 p. 383: Orfcmann, Zool. Jalirb., Syst,, VII. 1893-94, p. 699: Burger, Zool. Jalirb., 

 Syst., VIII. 1894.-95, pp. 363, 376, pi. ix fig. 18 and x. fig. 17. 



A single damaged female appears to differ from P. purpureus only 

 in the following particulars : — 



(1) though the 4th pair of legs are shorter than the 3rd, they are 

 decidedly longer than the 2nd, and still more decidedly longer than 

 the 1st, 



(2) the dactylus of the 4th pair of legs is the longest of all. 



40. Pinnoteres mactricola, n. sp. 

 Closely related to P. cardii, Burger. 

 The description applies to the female. 



Carapace perfectly circular smooth and polished, convex. Edge of 

 front nearly straight. Eyes minute, well pigmented. 



