FROM NEW YORK, NEW JERSEY, AND GEORGIA. 133 



D. oviFORMis, Cash (10). 



Numerous in Van Corfclandt Park and Long Island, with apertures evenly 

 three- and four-lobed (45). 



Habitat. Ponds and lakes. 



Length 70-80 /*. 



D. cratera, Leidy, represented by empty tests, is plentiful at Lakehurst 

 and in New York City water-supply, but Leidy's supposition is undoubtedly 

 correct that it is a Ciliate allied to the genus Tintinnus, probably Codonella 

 lacustris, Entz. <- 



Genus Cdcurbitella, Penard (36). 



CucuRBiTELLA MESPILIFORMIS, Penard (36). 



D. lohostoma pars, Leidy, pi. 15. fig. 7 (30). 



Occurs in Van Cortlandt Park, but is rare ; this, however, may be due to 

 the method of collecting ; in a pond in Yorkshire it was not seen, althouo-h 

 numerous gatherings had been made, until during a drought it was found 

 plentifully in the muddy sediment. 



Length about 100 jx ; diameter 80 jjl. 



It has been found in the Western States by Edmondson (private letter). 



Genus Cryptodifflugia, Penard (36). 



Cryptodifflugia eboracensis, Wailes (45). 



Found only in Penney's and Trout Ponds, Good Ground, where it is not 

 uncommon in sphagnum. Many w^ere seen in an active state. C'olour 

 reddish brow^n. 



Length 26-28 fx; breadth 14-16 jx ; thickness 12-14 fju ; aperture 5-6 jjl. 



Distribution. Long Island, N.Y.; Alaska ; Great Britain (45). 



C. COMPRESSA, Penard (36). 



Only two individuals were seen in sphagnum, and they were unusually 

 small. The pseudopodia were not observed. 

 Length 13 /x ; breadth 9 fx; thickness 5 /u. 

 Trout Pond, Good Ground. 



0. OVIFORMIS, Penard. 



Not common : some of the tests were noticeably compressed. 

 Length 14-20 /x ; breadth 10-14 yu, ; aperture 3-4 yu, ; nucleus 3*5 fx in 

 diameter with a central nucleole. 



Distribution. Lakehurst, N.J.; Good Ground^ L.I. 



Genus Nebela, Leidy. 



In the localities visited which were devoid of sphagnum few species or 

 individuals of this genus are to be found, but in the Cedar Swamps of 



