230 Bulletin Vanderbilt Marine Museum, Vol. VI 



ly curved, the outer one coarsely and the inner one finely crenulate. 

 The second pair of pleopoda have the peduncle similar to that of 

 the first pair, but shorter, prismatic, with the inner distal apex 

 more produced ; the outer blade is shorter and less wide than the 

 related inner blade, moderately lanceolate, with the inner margin 

 crenulate; the inner blade is broadly lanceolate, with both mar- 

 gins curved and crenulate. The third, or most distal pair of 

 uropoda, have the peduncle short, wide, less than half as long as 

 the related outer blade ; these two blades are decidedly the widest 

 of the rhipidura ; the outer blade being the smaller of the two 

 and unequally developed, having its inner margin more widely 

 expanded and rounded; the inner blade is longer and wider, ex- 

 panded considerably from the base distally, with the two lateral 

 margins convergent to an acute apex; both margins crenulated. 

 I have associated the name of Dr. T. R. R. Stebbing with this 

 species. His invaluable knowledge of Crustacea was only excelled 

 by his great generosity to younger students. 



