no. 1651. REPORT ON THE OSTRACODA—SHARPE. 415 



22. CYPROIS MARGINATA (Strauss). 



Plate LVIII, figs. 1-5. 



Cypris marginata II. B. Strauss. Mem. clu Mus. d'Hist. Nat., VII, 1821, 



p. 59, pi. i, figs. 20-22. 

 Cypris fiava Zaddach, Synop. Crust. Truss. Prodr., 1844, p. 33. 

 ('Hindi* flava Brady and Norman, Trans. Royal Dublin Soc, Pt. 1, 1889, p. 



97, pi. viii, figs. 18-19; pi. xn, tigs. 13-21, 3S. — Claus, Art), aus den Zool. 



Inst. Wien, X, 1892, Heft 2, pi. v, fig. 10; pi. vi, fig. ('..— Mullek, 



Zoologlea, XII, 1900, Heft 30, p. 49, pi. mi, tigs. 1-10, 12-16. 

 Cyprois marginata Sabs, Forh. Vid. Sclsk. Christiania, 1890, p. 54. — Brady 



and Norman, Trans. Royal Dublin Soc, V, 1896, p. 727. — Kaufmann, 



Revue Suisse de Zool., 1900, p. 259, pi. xv, figs. 5-9; pi. xvn, figs. 11-19; 



pi. xvni, rig. 4; pi. xxix. tig. 10. 



Dimensions. — Length, 1.52 mm. ; breadth, 0.75 mm. ; height, 

 0.96 mm. 



A very markedly peculiar form, uniformly yellowish in color, with 

 no especial markings except numerous small papilla? and a few scat- 

 tered hairs. 



Seen from the side (fig. 1), the dorsal edge is humped just back of 

 the eye-spots, thence sloping rapidly to the evenly rounded posterior 

 margin. The ventral edge nearly straight, the anterior edge evenly 

 rounded. A hyaline margin is yery plainly evident about the entire 

 edge of shell, especially wide and prominent anteriorly, less so poste- 

 riorly and least of all dorsally and ventrally. This, no doubt, gave 

 rise to the specific name as given by Strauss in 1821. The entire 

 margin of the shell just within the hyaline flange appears to be 

 tuberculate. because of the presence of unusually prominent " pore- 

 canals." 



Seen from above (fig. 2). the shell is elongate. oval, sharply pointed 

 anteriorly, less so posteriorly, the greatest breadth in the middle be- 

 ing about one-half the length. Testes and ovaries show plainly 

 through the shell. 



Natatory setae of the second antenna? plumose, and reaching to 

 tips of the terminal claws. Terminal claws of the last segment 

 rather slender, nearly straight, three and one-half times length of 

 terminal segment. Terminal claw of penultimate segment reaching 

 to tips of terminal claws. 



The second foot ends in a beak-like segment (fig. 5) ; the terminal 

 claw bent at right angles to the foot; the terminal three-fourths part 

 being straight and about three times length of terminal segment, the 

 terminal segment being about as long as broad. 



The first maxillary process has six strong, toothed spines (fig. 4), 

 these being much similar to those of Notodromas, but more coarsely 

 toothed. 



Furca stout (fig. 3), slightly curved, about seven times as long on 

 dorsal edge as the average width, and terminating in four long setae; 



