NO. 1347. FRESH-WATER OSTRACODA-SHARPE. 993 



This genus has been estal^lishcd })y Kaufraann to receive tho.se 

 Fofamoei/prk-like forms which have rudimentary natatory setje. 

 No American forms known. 



24. CYPRIA Zenker, 1854. 



Cijpris AucTORUM, 1785-1854. 



Moriorulus Jurixk, Histoire di-s Monocles .lui «e trouvent aux environ^ .lo 

 Geneve, 1820. 



Ci/pria Zenker, Monog. der Ostracoden, Wieg. Archiv. f. Naturg., XX Jahrg., I, 

 1854.— Brady and Norman, A Monog. of the marine and fresh-water ( )st'ra- 

 coda, Sec. I, Trans. Royal Dublin Soc, 1889, p. 68.— Vavra, :sronog. dei 

 Ostrac. Bohmens, Arch. Naturw. Durchfarsch. v. Bohmen, VIII. ^Siil, 

 p. 62.— Cronenberg, Beitrag zur Ostraooden-Fauna der I'nigegeiid voii 

 Moscou, Bull. Soc. Imp. d. Moscou, No. .S, 1894, p. I.S.— Kaifmann, Cypriden 

 nnd Darwinuliden der Schweiz, Revue 8uiH.se de Zool., \'III, l<)on, p". .•529. 



Shell rather codnpressed. Second antenna^ of maU» six-set^nnentcil. 

 of female five-segmented, two sense organs on end of fourth .segmoiit. 

 Natator}^ setae excessively long, reaching far })eyond tips of terminal 

 claws. Branchial plate-of six setje. Termhial segment of .second foot 

 small. Ductus of male of circlets of spine-like seta', with a distinct 

 central axis and not inclosed in a sack. 



Furca normal, stout. Dorsal f ureal seta situated about middle of 

 dorsal margin. 



Vavra has described a species of this genus as sufficientl}^ character- 

 istic to justify a subgenus J^hysocypria. 1 here use it in the group 

 sense, as the characters given seem to be of somewhat doul)tful worth, 

 if our experience with the old genus Cyj)r hiatus is any criterion. 



The subgenus Physocypria is distinguished by the following charac- 

 ters, one shell higher or larger than the other, and the anterior and 

 posterior margins of the right shell crenulate. Otherwise as Genus 

 Cyprla. The subgenus Oyjyria includes the remaining Cyprhi forms- 



Seven species have been reported from America. 



1. Subgenus CYPRIA. 



a Terminal .short setse of the second foot approximately e(jual. 



h Terminal short setae of second foot about as long as terminal segm«'iit. 

 c Terminal claw of furca half as long as furca. 



d Shell covered with a close reticulum of longitudinally sultparallel line.s. 



Abdomen without processes r.vKculpUi Fischer. 



dd Shell plain, but with small puncta. Abdomen with two cylindrical i>roc- 



pgggg (iptludmicit .lurine. 



cc Terminal claw of furca three-tifths its lengtli or longer. 



d Subterminal claw with well developed comb of teetli near tip. 



dentifini Sharpe. 

 an Terminal short setfe of second foot evidently unequal. 



h Shell clear to brownish yellow, with a few scattered puncta. Dorsal seta of fun-a 



three times width of furca from subterminal claw <''"••>•" ShariK«. 



h}> Shell white, shining, smooth, witli numerous almost comfluent puncta. Length 

 0.70 mm , ;«,-». Chambers. 



