NO. 1341. AMFHIPODA FROM COSTA RltA-STEBBiyG. ygj 



ur. 1. Lateral view of first uropods of male, together with the second and third 

 uropods and telson, in attachment to the fourth, fifth, and .sixth segments of 

 the pleon. 



ur. o. 9 . Third uropod of female. 



T. Telson of female. 



Plate LXI. 



Hyalella faxoni, new specks. 



n. s. Length of male specimen examined, not including the antennae. 



a. s., a. i. Upper and lower antennje of the two sexes. 



m.r. 1. First maxilla (from a separate specimen). 



gn. 1, fjn. 2. First and second gnathopods of both sexes, with furtlier enlargement of 



distal i^ortion. 

 prp. 5. Fifth pera^opod of male. 

 PL s. 3. 9 . Third jileon segment of female. 

 ur. 3. Third uropod, respectively, of male and female. 



T. Telson of each sex, that of the male from the specimen of which the first maxilla 

 is figured. 



The figures are from male specimens, unless accompanied by the symbol of the 

 female ( 9 ) • 



Only two scales of magnification are employed, all the figures except one being 

 drawn to the lower scale, while some are wholly or partially dujjlicated on the 

 higher scale. The first maxilla of Hyalella faxoni is represented only on the higher 

 magnification. 



Proc. N. M. vol. xxvi— 02 62 



