652 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



Off Grenada, lat. 11° 25' 00" N.; long. G2° 04' 15" W., 96 fathoms, 

 Co. brk. Sh., temp. 58r ; Station 253, U. S. C. S. Str. Blake, Feb. 27, 

 1879 ; 1 male. Cat. No. 2731, M. C. Z. ; 1 male. Cat. No. 2923, M. C. Z. 



One female collected by the U. S. C. S. BJake and labeled " Station 

 272. Montserrat." Station 272 is off Barbados, 70 fathoms. Cat. 

 No. 17852, U.S.N.M. 



ADDITIONAL " BLAKE " STATIONS CITP:D T.Y A. IIILNE EDWARDS. 



Station 155, same locality as Station 150, above. 

 Station 232, off St. Vincent, lat. 13° 00' 45" N.; long. 01° 00' 55" 

 W., 87 fathoms, Co., temp. 62°, Feb. 21, 1879. 



OSACHILA SEMILEVIS, new species. 

 Plate 3G, fiff. 1. 



Postero-lateral margin much shorter than antero-lateral. 



Carapace smooth except on elcAations. 



No longitudinal elevation between cardiac and mesobranchial 

 elevations. 



Postero-lateral margin thick, with rounded lobes, the first or lateral 

 lobe projecting sideways equally with the adjacent antero-lateral 

 tooth, the last lobe prominent. 



Teeth on upper margin of manus simple. 



Variations. — One specimen only, a rather small female, has a small 

 protuberance between the mesobranchial and cardiac protuberances. 

 In some cases the penultimate lobe of the postero-lateral margin is 

 so shallow that it has no appearance of a lobe but only a straight piece 

 of thickened margin. In the female, No. 17851, U.S.N.M., the meso- 

 brancliial lobe may be said to include the lateral marginal lobe, but 

 this is scarcely true in the other specimens. 



LOCALITIES OF SPECIMENS EXAMINED HY THE AVKITER. 



West coast of Florida, lat. 29° 14' 00" N.; long. 85° 29' 15" W., 25 

 fathoms, Co.; Station 2373, U. S. F. C. Str. Albatross, 1885; 1 female, 

 holotype. Cat. No. 17851, U.S.N.]\I. 



West coast of Florida, lat. 26° 19' 00" N. ; long. 83° 11' 00" W., 27 

 fathoms, S. Algae, temp. 68° ; Station 5108, IT. S. F. C. Sch. Grampus, 

 1889; 1 female, Cat. No. 18203, U.S.N.M. 



West coast of Florida, lat. 25° 34' 30" N.; long. 83° 01' 00", 27 

 fathoms, fne. S. blk. Sp., temp. 68°, Station 5079, IT. S. F. C. Sch. 

 Grampus, 1889; 1 female. Cat. No. 18204, U.S.N.M. 



EXPLANATION OF PLATE 31). 



Fia. 1. Osachila scmilcvin, female, parlhilly ovorj^rowii with bryozoans nntl 

 worm liil)e. Holotype. X2l. 



2. Osachila aniillcnsifi, female. Holotype. X2. 



3. Osachila tubcrosa, female. Oat. No. 8740. X2}. 



