2$2 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol. 50 



middle, on either side of which the lateral angles are produced in 

 rounded lobes, the inner one being the wider. The outer branch 

 of the uropoda is large and extends a little beyond the lateral 

 angles of the basal article. The inner branches are short, not 

 reaching by some distance the extremity of the apical process of 

 the sixth abdominal segment. All the legs are ambulatory. 



About twenty specimens were collected by Dr. O. F. Cook at Alt. 

 Coffee. One specimen was collected by Rev. George P. Goll and 

 three by Mrs. Sharp in the same locality. Two specimens were 

 collected by Mr. R. P. Currie in the same locality. 



The type is in the possession of Dr. O. F. Cook. 



The co-type, collected at Mt. Coffee by Rev. Geo. P. Goll, has been 

 placed by Mr. R. P. Currie in the U. S. National Museum. Cat. 

 no. 38,521. 



Genus PERISCYPHOPS Budde-Lund 



Periscyphops Budde-Lund, A Revision of "Crustacea Isopoda Terrestria,' - 

 pt. 1, Eubelum, 1899, p. 15. 



Flagellum of second antennae composed of three articles. Cox- 

 opodites of first thoracic segment adjacent to and extending along 

 the lateral margin of the segment, being separated from it by a 

 longitudinal groove. The lateral margin of the coxopodite is not 

 sulcate. The posterior margin is entire, the coxopodites not being 

 cleft by any fissure separating them from the post-lateral angle of 

 the segment, to which they are united. Coxopodites are present 

 on the anterior portion of the underside of the second and third 

 segments in the form of a narrow ridge. 



Outer branch of uropoda inserted about the middle of the pos- 

 terior margin of the basal article. 



Analytical Key to the Species of the Genus PERISCYPHOPS from 



Liberia 



a. — Terminal segment of abdomen with the apex produced in a short triangu- 

 lar process, with sides converging gradually to a rounded extremity, and 

 not reaching the inner post-lateral angle of the basal article of the 

 uropoda. Inner branches of the uropoda conspicuous in a dorsal view, 

 and extending some distance beyond the extremity of the terminal 

 abdominal segment and a little beyond the outer branch of the ur- 

 opoda Periscyphops brevicaudatus, sp. nov. 



a. — Terminal segment of abdomen with the apex produced in a moderately 

 wide process, with sides parallel and rounded at the extremity. Inner 

 branches of the uropoda short, not conspicuous in a dorsal view and 

 not reaching the extremity of the terminal abdominal segment. 



Periscyphops cooki, sp. nov. 



