I9I7-J 



vS. Kemp : Notes on Crustacea Decapod a. 



55 



the large spines bear one or two long spinules near their distal 

 ends (text-fig. 2c). 



The external maxilli pedes reach barely to the end of the 

 second segment of the antennular peduncle and are slightly exceeded 

 in length by the third peraeopods. There is no tooth on the inner 

 margin of the basis of the latter pair of limbs. 



The third thoracic sternite of the female is broadly triangular 

 in shape ; it is not grooved longitudinally and the anterior margin 

 is elevated and more or less transverse (text-fig. 3c). The charac- 

 ters are difficult to see owing to the small size of the species. 



The large procurved tooth found in A. indicus and A. ery- 



CO. 



o. 



e^. 



Fig. 5. — Telson in dorsal view. 



a. Acetes erythraens. b. Acetes insularis. 



Apex of telson in dorsal view. 



c. Acetes indicus. e. Acetes insulayis. 



d. Acetes erythraeus. f. Acetes japonicus. 



thraeus between the bases of the first pleopods is replaced by a 

 small bluntly pointed process. 



The internal lobe of the petasma is very greatly expanded at 

 its proximal end, both internally and externally, and the posterior 

 border is conspicuously emarginate. The distal portion somewhat 

 resembles that of A. indicits, but is more swollen. At the tip 

 there is a single great conical tooth and near the outer edge a 

 series of 5 or 6 modified teeth (text-fig. 4c). 



The telson is characteristic. It is shorter than in either of 

 the two preceding species and reaches barely to the middle of the 

 inner uropod. The angular termination of the lobe at the proximal 

 end of the infero-lateral margin is placed midway between the base 

 and the apex, whereas it is situated much nearer the base in the 



