52 



Records of the Indian Museum. 



[Vol. XIII, 



the tip of the large spine is opposed by a group of 5 spinules, 

 exactly as in A. indicus; in the others, as shown in text-fig. 26, 

 only 2 or 3 spinules occur in this position. The segment immediately 

 in front of that bearing the clasping spine bears an angular lobule. 

 The third maxillipedes, when stretched forwards, reach about 

 as far as the third peraeopods, and extend to the end of the an- 

 tennular peduncle. There is no tooth on the inner border of the 

 basis of the third peraeopods. 



c. 



Fig. 3. — Third thoracic sternite and basal ses^-mcnts of third peraeopods of 



female. 



a. Acetes indicus. c. Acetes insularis. 



b. Acetes erythvaeus. d. Acetes japonicus. 



The third and fourth thoracic sternites of the female show 

 only faint traces of the deep longitudinal channel found in A. 

 indicus and the former does not possess the pair of tuberculiform 

 eminences present in that species. The third sternite is broadly 

 triangular in shape; its anterior margin is elevated and is con- 

 cave in the middle with a small rounded lobe on either side (text- 

 fig- 3&). 



