38 



THE AMERICAN NATURALIST [Vol. XLI 



In tap water from Fresh Pond, Cambridge, Mass. Aug. 12, 

 1905. A. S. Pearse, coll. 



Cohasset, Mass. Oct. 22, 1906. Owen Bryant, coll. 



This species should be found everywhere in all kinds of fresh 

 water. It is probably the most abundant and one of the most 

 widely distributed of our fresh-water ostracods. It may be over- 

 looked on account of its small size. 



Subfamily Cyclocypridinae 

 Genus Cypria Zenker, 1854 

 6. Cypria exsculpta (Fischer) 



Cypris exsculpta Fischer, "Beitrag zur Kenntniss der Ostracoden." 



Abhandl. math. phys. Klasse k. bayr. Akad. d. Wiss., vol. 7, 1855, 



p. 18, pi. 19, figs. 36-38. 

 €ypria exsculpta Brady and Norman, "Monograph of the Marine and 



Freshwater Ostracoda, Sec. I," Trans. Roy. Dublin Soc, ser. 2, vol. 4, 



1889, p. 68, pi. 11, figs. 1-4. 



Length 0.68 mm., height 0.44 mm., breadth 0.28 mm. 



Woods Hole, Mass. Abundant in fresh-water pond, June 25, 

 1905, A. S. Pearse, coll. July 15, 1906, J. A. C, coll. Auburn- 

 dale, Mass., Oct. 28, 1906, C. W. Johnson, coll. 



This species is almost as widely distributed and abundant as 

 the preceding. It should be found throughout New England. 



Subfamily Candoninse 



Genus Candoxa Baird, 1850 



7. Candona Candida ((). F. :\Iiiller) 



Cypris c(t>t(lii1n ( ). F. Miillcr, /. r., 17'.t2. p. ^Vl. tai). 0, figs. 7-9. 

 Candona cnndi^ln Lilljchorj:-, I), Cnistnnis , .,■ nnlinihus Tribus, 1853, 



Length O.SC) !.:;<) mm., liri-lit 0.45 O.C.i; mm. 



Arhngton, Ma>s.. May 7, l')()5, A. S. IVarsc, coll.; AuhunHlale, 

 Mass., Oct. 2.S. KKH;, (\ \V. Johnson, coU. 



This species has not been reported from America as far as I 

 am aware. The .specimen.s seem to a,nret> well with European 



