47 8 



Memoirs of the Indian Museum 



[Vol. V, 



thickened and irregularly dentate at the end, ending in 2 or 3 points; the inner 

 margin of the merus is also thickly covered with setae, but most of these are more 

 normal in appearance, ending acutely; the propod bears only a few setae of normal 

 structure. The second leg is similar to the first, but more slender and the setae on 

 the carpus are fewer and end more acutely in the usual way, while in the third leg 

 there is still less modification, the joints bearing only a few more than the ordinary 

 normal supply of setae. It is probable that the male oi II. hispidus has similar 

 characters, for Collinge states that " the three terminal joints are fringed with stout 

 spines with trifid terminations," though he does not say whether this is common to 

 all the legs or not. 



The first and second pleopoda of the male of H. carinatus show characters on 

 the whole similar to those found in other species of Porcellio. In the first pleopod 

 (fig. 31) the endopod is nearly twice as long as the exopod, its basal half is broadened, 



Hemiporcellio carinatus, Collinge. 

 Fig. 31. — First pleopod of male. Fig. 32. — Second pleopod of male. 



while the distal half narrows to an acute point, the broadened basal portion being 

 filled with an extremely powerful muscle. The second pleopod (fig. 32) has the 

 exopod somewhat more triangular and longer than in the first, its outer margin bears 

 a number of short spinules ; the endopod consists of a broad basal joint, subtriangular 

 in shape, followed by a second joint curving outwards to a very acute point and 

 reaching considerably beyond the end of the exopod. 



In the antenna the 3rd, 4th and 5th joints of the peduncle are carinated 

 as described by Collinge, and the 2nd, 3rd and 4th have indentations at the end with 

 tooth-like processes between them, as shown in fig. 29. These are apparently similar 

 to those in H. immsi, the figure and description of which I had not specially noted 

 until after my figure had been drawn. The 4th joint has a distinct groove on the 

 outer side into which the 5th joint fits when bent back in the usual position. The 

 small process at the end of the terminal joint of the flagellum ends in a slight 

 enlargement. 



