I 



N.J. 13 17. FRESH- WA TER OSTRA CODA-SHA RPE. < » . H 



Shell very plump. Natatory set» extending much beyond the termi- 

 nal claw!>. Branchial plate of two to five plumose seta'. Second foot 

 tive-segmented, with a strong claw at its extremity. Fumi flagelli- 

 form, with a small dorsal cilium, or at least two terminal seta'. Males 

 unknown. 



Those Oyj7tndopsis-\\VQ forms with a compressed dorsal aspect, 

 branchial plate of not more than two seta?, and sexual or asexual prop- 

 agation, I shall include under the genus Potamocyprk. 



rt Three transverse dark bands on dorsal and lateral aspect of shell; very plump; 

 common v\dxm{i). F.'Miiller).' 



22. POTAMOCYPRIS Brady, 1870. 



MomwuhiA JuKiNE, Histoire des Monocles (jui se trouvent aux environs de ( leneve 

 1820. 



O/pridopsis Brady, A Monog. of the recent British Entonios., Trans. Linn Soc 

 XXVI, Pt. 2. 



CandoneUa Claus, Beitrage zur Kenntniss der Siisswasser-Ostracoden, Arb. Zool. 

 Inst. Wien, X, 1892.— Vavra, iSiisswasser-Ostrac. Deutsch-Ost-Afrikas, Tier- 

 welt Ost-Afrika, IV, Berlin, 1897, p. 12. 



CijpndopsisX A\B..\, Monog. derOstracoden B(')hmens, Arch. Xaturw. Durchforsch. 

 v. Bohmen, Vlil, 1891, p. 73.— Sharpe, Cont. to a Knowl. of the N. .\nieri- 

 can freshwater Ostracoda, inch in the Fam. Cytheridfc and Cyprididte, Bull. 

 111. State Lab. Nat. Hist., IV, 1897, p. 468. 



Cijprido2^sclla Kaufmann, Cypriden und Darwinuliden der Schweiz, Revue Suisse 

 deZooL, VIII, 1900, p. 131. 



Potamociipris Brady, Notes on Entomos. from Northumberland ami Durham 

 District, Nat. Hist. Trans. Northumb. and Durham, III, 1870. — Bkady and 

 Norman, A Monog. of the marine and freshwater Ostraco<'a, Sec. I, Trans. 

 Royal Dublin Society, 1889, p. 92. — Daday, Mikros. Siisswassertbiere aus 

 Patagonia gesammelt von Dr. Filippo Sylvestri im Jahre, 1899 und 1900, 

 Termesz. Fiis., XXV, 1902, p. 291. 



Natatory seta> about as long or somewhat longer than end claws. 

 Second antennae usually four-segmented, armature of male coarser 

 than that of female. 



Shell narrow from al)ove, rather smooth. Branchial plate of not 

 more than two setw. Furca rudimentary, with a small dorsal cilium 

 and ending in a long slender bristle. Propagation, sexual or asexual. 

 Ductus of male of about fourteen spiral rows of chitinous si)ines. 



This genus was first established by Brady to include those Cypri- 

 dfopsis like forms having rather short natatory sctw, four-segmented 

 antennte, compressed shell, and sexual propagation. To prevent con- 

 fusion, it seems necessary to add the additional characters, as above. 



I consider CandoneUa and therefore Cypridopsclla as synonymous 

 with the above. 



a Furca cylindrical, turgid at base, suddenly narrowing to a liristle, whicli is little 



longer than the basal part imdom ( Brady and Robertson ). 



aa Furca broad, gradually narrowing to a bristle. Shell much compressed. 



