V)90 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



3. Subgenus HETEROCYPRIS. 

 ^s'o Anici'icaii I'oniis known. 



4. Subgenus, unnamed. 



(I Lcngtl). ."i.titt nun: lieii^'lit, 2.0it nun. Color, livid white (jrandln (^Xi-wnhers. 



5. Subgenus AMPHICYPRIS. 

 TsO Ainoriciin forms known. 



lA'. Sviiiikiniiy c^^r»riii:)or'?^i3sr^. 



19. ONCOCYPRIS G. W. Muller, 1898. 



Oiicoeii])riH G. W. Muller, OHtrac. aus Madagas. und Os^t-Afrika, Abhand. Seiick. 

 Natiirf. (;es., XXI, 1898, p. 286. 



Shell irreouhirly roughened, with numerous prominent tubercles. 

 Second antennie four-segmented in both sexes. First foot foui"-seg- 

 mented. Ductus of about eighteen rows of chitinous spines, in sack. 

 Terminal segment of second foot not beak-shaped, but small and con- 

 ical. Furca with no dorsal seta, lamellar and ending in a long l)ristle. 



This genus was established b}^ Muller to receive a form collected 

 near Majunga, Madagascar. 



No American forms known. 



20. ZONOCYPRIS G. W. Muller, 1898. 



* Zon(>ciji>ris (i. W. Muller, Ostrac. aus Madagas. und Ost-Afrika, Abhand. Benck. 

 Naturf. Ges., XXI, 1898, p. 284. 



Shell covered with a prominent series of concentric zones. Second 

 antenna3 of sexes d liferent. Furca usually with no dorsal seta, lam- 

 ellar and ending in a long bristle. 



This genus was established to receive two forms from Madagascar. 



Cypr'tdopsiH costata^ a form from East Africa, evidently belongs here. 

 Vavra describes it as having a furcal dorsal seta, a feature not men- 

 tioned by Miiller. This might, then, constitute the type of a group 

 of the genus. 



No American forms reported. 



21. CYPRIDOPSIS Brady, 1868. 



MonocaJuxivKi^'E, Histoire den Mon()cles(|ni setrouvent aux environs de Geneve, 



1820. 

 J'ionocypris Bkady and Norman, A. Monog. of the marine and freshwater Ostra- 



coda. Sec. II, Trans. Royal Dublin Soc, 189(), ]>. 725. 

 ('lipridopsls Brady, A Monog. of the recent British Entonios., Trans. Linn. Soc. 



XXVI, Pt. 2. — Brady and Norman, A Monog. of the marine and freshw'ater 



Ostracoda, Sec. I. Trans. Royal Dublin Soc, 1889.— Vavra, Monog. der 



Ostrac. B()hmens, Arch. Naturw. Durchforsch. v. Bijhmen, VIII, 1891, p. 



8. — Kaufmann, Cypriden und Darwinuliden der Schweiz, Revue Suisse de 



Zool., VIII, p. 304. 



