1898.] A. Alcock — Car etiological Fauna of India. 227 



(3) the carapace is closely covered with tiny purple (in spirit) dots, 

 except for a very distinctly defined y^-shaped white area stretching 

 across its posterior half : the legs, sternum and abdominal terga are 

 less closely covered with similar purple specks : chelipeds white. 



Length of carapace 7 millim., breadth 8 millim. 



In the Indian Museum are a male from off Table I. (Andamans) 

 15-35 fms., and a female from off the Andamans, 20 fms. 



Quadrella coronata, var. reticulata, nov. 



Differs from the typical form in the following particulars : — 



(1) the carapace is distinctly broader than long : 



(2) the chelipeds in the male are only about 2f times the greatest 

 length of the carapace, and under the lens are more or less frosted over 

 with granules : the anterior border of the arm is serrate, the inner 

 border of the hand and thumb is finely denticulate : 



(3) the carapace is symmetrically traversed by several fine purple- 

 brown lines which intersect to form a regular and wide meshwork, and 

 there is an irregular meshwork of similar coloured lines on the hands. 



Length of carapace 7 millim., breadth 8 millim. 

 In the Indian Museum are a male from the Andamans, taken on a 

 Spongodes, and two from off Ceylon 34 fms. 



149. Quadrella boopsis, n. sp. 



Differs from Q. coronata in the following particulars : — 



(1) the chelipeds in the male are only about twice the greatest 

 breadth of the carapace : 



(2) the arm is stout, is only about three-fifths the greatest length 

 of the carapace, and bas its anterior border serrated, not spiniferous : 



(3) the eyes are large, their diameter being about one-fifth the 

 greatest length of the carapace : 



Colours in spirit uniform yellowish. 



Length of carapace equal with the breadth, which is 5 millim. 



In the Indian Museum are a male and a female from the Arakan 

 coast 20-30 fms. 



This species is not the young of Q. coronata, which has the long 

 slender arm and small eyes of the adult. 



Sphenomerus, Wood-Mason. 



Sphenomerus, Wood-Mason, Ann. Mag. Nat. Hist. March 1891, p. 263. 



Carapace transversely oval or subcircular, the front and antero- 

 lateral margius forming together a semicircle ; markedly convex in 

 both directions, perfectly smooth, without trace of regions. 



