igoy.] Records of the Indian Museum. i6i 



palm, over which the powerful finger closes, leaving two gaps, a 

 small one near the hinge, a long one near the hind margin, with a 

 squared denticulate process between them. In the female the fifth 

 joint is not cup-like, longer than broad, densely fringed on the hind 

 margin ; the sixth joint is not longer than the second, the hind mar- 

 gin and most of the front carrying numerous spines, the palm 

 spinulose, oblique, leaving no gaps between it and the closed finger. 



PercBopods. — The first and second pairs are slender, the fourth 

 joint longer than the fifth or sixth. The third pair is shorter than 

 the fourth or fifth ; in each the second joint is expanded, but more 

 so in the upper part of the last pair, this joint also having its sinuous 

 hind margin rather more strongly serrate than is the case in the third 

 and fourth perseopods. The fingers are not very large, each with a 

 distinct unguis. The branchial vesicles are simple, large in the 

 second gnathoj>ods and first and second perseopods, diminishing 

 successively in the next two pairs. The marsupial plates are narrow. 



Pleopods. — These are narrow, with elongate rami, the inner rami 

 of each pair closely contiguous. 



Uropods. — The first pair have the peduncles slightly longer than 

 the equal rami, with a strong spine near the base of the outer margin, 

 and two longitudinal rows of spines ; the shorter second uropods 

 have the peduncles about as long as the subequal rami ; the third 

 pair extend back much beyond the second, the elongate oval rami 

 being only a little unequal and fringed with numerous little spines 

 and setules ; this pair is very easily detachable. Length of male, 

 if straightened out, about 12 mm., female considerably smaller. 



Locality. — Port Canning, Lower Bengal, brackish pools. The 

 generic name refers to the fourfold organs of vision, the specific 

 name to the province in which Dr. Annandale discovered this 

 notable species. 



