184 A. Alcock — Carcinological Fauna of India. [No. 2, 



at a tubercle in the intestinal region, and is again crossed transversely 

 by a similar ridge, which is strongly convex forwards : these are the 

 only ridges on the carapace. 



The front has the form of two broad sharp-cut teeth which are 

 prominent beyond the eyes. 



The outer margins both, of the endopodite and of the exopodite 

 of the external maxillipeds are granular and somewhat raised. 



The exposed surfaces of the thoracic sterna, and of the carapace 

 round the bases of the chelipeds, are covered with large granules (in 

 the female — male unknown). 



The chelipeds in the female are very little longer than the cara- 

 pace : the arm is sbarply trigonal, with the edges coarsely granular : 

 the wrist and hand have the upper surface rough : the edges of the 

 ha,nd are sharp, and the upper surface of the hand is traversed, from 

 its base to the finger-cleft, by a sharp finely-beaded ridge, as in 

 N. ahhreviata : the fingers (in the female) are about two-thirds as long 

 as the hand, and are finely denticulate. 



The legs are slender and compressed, with the merus, carpus and 

 propodite sharply carinate dorsally. 



Colours in spirit : mottled like Castile soap. 



Length of carapace 9 millim., breadth 105 millim. 



A single ovigerous female from the Persian Gulf. 



This species well illustrates the close relation between Nursia 

 and Tlos. 



27. Nursia ahhreviata, Bell. 

 Nursia ahhreviata, Bell, Trans. Linn. Soc. Vol. XX I. 1855, p. 308, pi. xxxlv. 

 fig. 5, and Cat. Leucos. Brit. Mus. p. 20 : Henderson, Trans. Linn. Soc, Zool., (2) 

 V. 1893, p. 404. 



Carapace about eight-ninths as long as broad, abnormally de- 

 pressed — almost laminar — except in the mid-gastric region, which is 

 somewhat angularly elevated : its borders, behind the front, are thin, 

 foliaceously expanded and sinuous, forming 7 shallow lobules, the least 

 distinct of which is the posterior border, which again is very incon- 

 spicuously subdivided by a faint emargiuation in the middle line : the 

 whole of the free edge of the carapace is finely beaded, and slightly 

 upturned, so as to emphasize the depressed appearance of the carapace. 



An anteriorly-convex milled carina crosses the carapace from one 

 lateral margin to the other, and is met in the middle line by a milled 

 ridge running from the front : these are the only ridges on the carapace. 

 There is granular elevation in the cardiac region, otherwise the 

 carapace is smooth. The front is broad and prominent with the edge 

 a little convex. 



