NEW CRU8TACRA. 99 



brevirostris, exilirostris and typus in its elongate rostrum. 

 From O. grandimstris and leucosticta it differs in the lack 

 of teeth upon the upper margin of the rostrum ; from C. 

 americana m the almost total lack of teeth on the lower 

 surface of the rostrum, while C. denticulata is thrown out 

 by similar characters. C. tenuirostris is a species of 

 Virbius. 



[PubUehed, March, 1897.] 



EXPLANATION OF PLATE III. 

 Figs. 1-7. Caradina pasadenoe. Figs. 8-10. Naushonia crangon- 



Fig. 



