216 BULLETIN 201, UNITED STATES NATIONAL MUSEUM 



Remarks. — This species may be recognized by the following char- 

 acters : 



(1) The carapace (fig. 90, a) is hardly produced as a rostral plate, 

 anterior margin broadly and evenly rounded, anterolateral angles 

 acute. 



Figure 90. — Acanthomysis macropsis (Tattersall) : a, Anterior end of female to show rostral 

 plate, eye, and antennule; b, antennal scale and peduncle, X 78; c, uropod, X 60; d, 

 telson, X 78; <f, third pleopod of male, X 78; /, fourth pleopod of male, X 62; g, fifth 

 pleopod of male, X 78. 



(2) The eye (fig. 90, a) is greatly elongated, three and one-third 

 times as long as broad, cornea occupying the distal quarter of the 

 entire eye. The eye is longer than the antennal scale and the antennal 

 peduncle and is remarkably like that of Macropsis. 



