304 



Records of the Indian Miiscuni, 



[Vol. XXII, 



part of the carapace between the gastric grooves the cariiiae are 

 for the most part not continuous as in S. iinilticarinata. Behind the 

 cervical groove there are in the latter species from 26 to 30 well- 

 defined longitudinal carinae, but in S. lirata less than half this 

 number can be counted and most of these are irregular and broken 

 up into small tubercles. The median carina in S. niulticarinata 

 is bifurcated for the whole of the distance in front of the mid- 

 dorsal pit. In one of our specimens of S. lirata the arrangement 



ifMIte 



Texl-fig. 3. — Scjiiil/d lirafa, sp. iio\'. 

 Carapace and first three exposed thoracic somites. 



is similar, but the carina is interrupted at the point where it 

 divides. In the other specimen (text-fig 3) the carina is bifurca- 

 ted for little more than half the distance between the mid-dorsal 

 pit and the anterior margin. 



The rostrum is less quadrate than in the allied species and 

 is more rounded anteriorly. On either side of Lhe median carina 

 only a tubercle or short carinula can be seen. The cornea of the 

 eye is less expanded. 



