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THREE NEW AMPHIPODS 

 By clarence R. SHOEMAKER 



Assistant Citratar, Divisifln of Marine Irnvrtchvates, US. National Museum 



The Amphipoda taken by the first Johnson-Smithsonian Deep-Sea 

 Expedition in the Puerto Rican Deep in 1933 consist chiefly of known 

 forms of Hyperiidea, but among the Gammaridea are three species 

 new to science, which I here designate as Cyphocaris johnsoni, IVest- 

 ivoodilla longiiiiaiia, and RJiachotropis lobata. 



CYPHOCARIS JOHNSONI, n. sp. 



Male. — First thoracic segment produced forward into a long, 

 narrow, sHghtly up-curved process somewhat hke that of C. richardi. 

 Head rather deep, with a long narrow eye, the facets of which are 

 long and point obliquely toward a central wavy line. Antenna i not 

 half the length of antenna 2. Antenna 2 longer than the entire animal. 

 Side-plate 2 deeper than i or 3. Side-plate 4 as deep as 5 and ap- 

 parently narrower than in the other species of the genus. Side-plate 

 5 long in proportion to its width. Gnathopods i and 2 and peraeopods 

 I and 2 about normal. Peraeopod 3 with second joint much more 

 than twice as long as its side-plate, proportionately narrow and armed 

 with serrations along about two thirds of the upper margin, third 

 to seventh joints combined not half as long as second joint. Peraeopod 

 4 slightly shorter than 5, second joint moderately expanded, hind 

 margin with a few serrations and produced downward into a pointed 

 lobe. Peraeopod 5, second joint moderately expanded, hind margin 

 slightly convex, bearing many serrations and produced downward 

 into a pointed lobe, seventh joint very short. Uropod i extending 

 backward farther than 2, which reaches back as far as 3. Uropods 

 about normal in form. Telson very narrow and nearly twice as long 

 as uropod 3, cleft for about seven eighths of its length, with lobes 

 sharply pointed, but having no spines or setae. 



Length. — About 19 mm. 



Holotype. — U.S.N.M. no. 69101, taken at station 97, latitude 

 i8°37'30" N. to i8°38'i5" N., longitude 65'o2'i5" W. to 65°oo'3o" 

 W., March 3. 1933, 310 to 400 fathoms. 



Smithsonian Miscellaneous Collections, Vol. 91, No. 12 



