670 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 41. 



Beyond this setose basal segment the flagelKim has five segments. 

 The inner fiagellum is composed of four segments. The setse on the 

 anterior face of the antennal peduncle are relatively short ; the fiagel- 

 lum extends back to the tip of the uropod peduncles. 



Strongly developed exopods are present on all the legs except the 

 last pair. 



The first and second pairs of pleopods are biramous with the 

 exopod of two segments. 



The peduncle of the uropods extends a little beyond the tip of the 

 telson and has about 20 spines on its inner edge. The endopod is 



distinctly longer than the exopod, its second 

 and third segments subequal, and shorter 

 than the first ; there are about 20 spines on 

 the inner edge. 



Remarks. — Several lots of this species are 

 labeled as having been taken at the surface. 

 The thin and only lightly calcified integu- 

 ment suggests that the species is adapted 

 for a partly pelagic life. 



The specific name is chosen in recogni- 

 FiG. 99.-OXYUROSTYLIS sMiTHi, tiou of my iudebtedncss to the writings of 



MALE, ANTENNULE. _, /. n T o •.! 



Prof. S. I. Smith. 



Localities.— Csisco Bay; U. S. F. C, 1873; U.S.N.M. 34899; 1 male. 



Vineyard Sound; surface; U. S. F. C, 1881; U.S.N.M. 44152, 

 44154; 8, male and female. 



Vineyard Sound; U.S.N.M. 34897; 1 female. 



Woods Hole; surface; U. S. F. C, 1882; U.S.N.M. 44145; 1 female, 

 2 males. 



Woods Hole; surface; V. N. Edwards, Bureau of Fisheries; 

 U.S.N.M. 44159-44165; many males and females (including holotype, 

 44162). 



Punta Rassa, Florida; 1 fathom; H. Hemphill; U.S.N.M. 44147; 

 1 female. 



Calcasieu Pass, Louisiana; tow, wharf; M. H. Spaulding, September, 

 1907; U.S.N.M. 44146; 1 male. 



COLUROSTYLIS (?) OCCIDENT ALIS, new species. 



Ovigerous female. — Total length, 12 mm. (An imperfect specimen 

 of an ovigerous female must have exceeded this length by about 

 one-third vdien complete.) 



The carapace is about two-sevenths of the total length, its vertical 

 height about two-thhds of its length, and its width a little less ; not 

 inflated, with its dorsal edge as seen from the side slightly arched 

 posteriorly then sloping downward to the short horizontal pseudo- 

 rostrum. The antero-lateral margin below the pseudorostrum is 



