No. 459.] WHITE MOUNTAIN RHIZOPODS. 149 
mens, the tests presenting a dark brown appearance. Whether 
this color was a result of the dark hue of the sand, or arose - 
from a lining membrane of brown chitin in which the grains 
were incorporated, was not surely made out. One test was 
unique: trailing from many points in its surface were long 
blackish streamers, one even longer than the test. Several 
cases of division were seen. 
Sise.— Length, 68-309 u; breadth, 35-201 4; aperture, 15- 
87 j: ; 
Localities — North Woodstock (Cushman Coll., nos. 183, 187, 
Henderson Coll., nos. 51, 53, 63); small pond, 5000 ft. alt., 
Mt. Munroe (Cushman Coll., no. 196) ; Franconia (B. S N: H4 
no. 4307); Pinkham Notch (B. S. N. H.; no. 5164) ; Squam 
Lake (Cushman Coll., no. 198) ; Intervale (Cushman Coll., nos. 
66; 67). 
Of D. pyriformis the following varieties described by Leidy, 
(p. 99) were found: var. compressa, North Woodstock; var. 
nodosa, Intervale ; var. vas, Intervale. 
Difflugia urceolata Carter. 
Test of the typical form with the urceolate lip. As a rule, 
however, the lip was not as well marked as in the specimens 
figured by Leidy. — 
Sise.— Length, 68 »; breadth, 58 a; aperture, 30 p. 
specimen is much smaller than that reported by Leidy. 
Locality. — North Woodstock (Cushman Coll., no. 176). 
This 
Difflugia acuminata Ehrenberg. 
Testasa rule of coarse sand grains with the fundus of the 
test drawn out into more or less of an acuminate projection. 
This species seems to differ more or less in its comparative 
breadth as all gradations were noted from very slender to fairly 
broad specimens. 
Size.— Length, 87-125 &; breadth, 46-60 u; 
3l a 
Dd. North Woodstock (Cushman Coll, nos. 
189) ; Intervale (Cushman Coll., no. 163). 
aperture, 22— 
182, 
