144 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



other figures are of the first and fifth legs. Both call for comments 

 on detail of structm*e. 



In the figiu-e of the first leg, both spines and processes are solidly 

 inked, so that they cannot be distinguished from one another. The 

 exopod would have the same number of spines as in the other species, 

 if distinction had been made between the processes and spines. The 

 long mner apical spine of exopod 3 is shorter than that shown for 

 typica, being equal to the length of the third segment plus about half 

 of segment 2, and may thus indicate that the two are not conspecific. 

 In both the text and the figure there is some confusion as regards the 

 distinction between the produced inner portion of the second basipod 

 segment and the endopod. The text refers to the spine of the "basal 

 2 of the endopod." Obviously the spine referred to belongs to the 

 second basipod segment and not to the endopod; it appears to be 

 similar to the stout, curved seta of the other species. No inner setae 

 are shown on endopod segments 1 and 2; this is probably due to 

 incomplete delineation rather than actual lack of setae. Endopod 

 segment 3 differs from all the other species in that there is a stout 

 apical spine in the position of the spinous process, though because all 

 processes and spines are solidly inked, the actual nature is not deter- 

 minable from the illustration. There seem to be five inner setae, 

 but these are somewhat indefinitely portrayed. 



The structure of the fifth leg is for the most part clear from the 

 figure. As further pointed out in the discussion (p. 171), the left 

 exopod is relatable to the American species and is not identical to 

 that of canalis. The important characteristics of the leg are: Right 

 and left basipods about equal in length; the first segments not fused; 

 left segment 2 with inner seta. Right second exopod segment only 

 little longer than first, with one prominent, proximally placed outer 

 marginal spine; beyond this spine the margin with a pair of closely 

 set points beyond which the segment is abruptly shortened, narrowed, 

 and inwardly directed. Right endopod reaching beyond exopod, with 

 three inner marginal setae. Left exopod shortened but 3-segmented, 

 not reaching to end of right exopod; segments 1 and 2 with prominent 

 outer spines about as long as total exopod and closely set to one 

 another; exopod segment 3 reduced (detail not shown in figure). 

 Left endopod reaching to end of exopod, unarmed. 



There is little doubt that this Madras specimen represents a different 

 species from canalis or from any other in which males are known. 

 Its occurrence near the type locality of typica makes it imperative 

 that consideration be given to the possibility that it may be the male 

 of that species. This point may or may not be establishable from a 

 complete comparison of appendages. 



