No. 459.] WHITE MOUNTAIN RHIZOPODS. ISI 
Hyalosphenia elegans Leidy. 
Test of yellowish brown chitin with the characteristic regular 
longitudinal corrugations. In the specimen examined a peculiar 
large irregular projection showed near the apex. 
Size. — Length, 90 u; breadth, 58 #; aperture, 15 a. 
Locality. — Mt. Munroe (Henderson Coll., no. 101). 
Quadrula symmetrica (Wallich). 
Test as name suggests, composed of a tiling of delicate, un- 
marked, square, chitinoid plates. These plates increase in size 
toward the fundus. 
Size.— Of specimens viewed on broader side, length, 58-78 u; 
breadth, 28-46 a; oval end, 14-21 a. One rather larger, but 
turned so that a slightly oblique view of the narrower side was 
afforded, gave measurements : length, 87 4; breadth, 33 4; 
aperture, 7 a. In this specimen the rounding notch of the 
aperture is visible. 
Localities. — North Woodstock (Cushman Coll, no. 181, 
Henderson Coll, no. 63); Saco Lake (B. S. N. H., nos. 4235, 
4325); Franconia (B. S. N. H., no. 4307); Pinkham Notch 
(B. S. N. H, no. 5148). 
Nebela collaris (Ehrenberg). 
Test in most of the specimens examined is composed of cir- 
cular or ovoid plates, transparent and colorless. Several speci- 
mens showed straight or curved longitudinal plates mingled 
with the circular ones. One was bent strongly on one side 
giving a curved form to the shell. 
Size. — Length, 65-196 p; breadth, 44-108 4; aperture, 
14—46 p. 
Localities. — North Woodstock (Cushman Coll., nos. 176, 178, 
180, Henderson Coll., nos. 52, 65); Lake of the Clouds (B. S. 
N. H,, no. 4319); Profile Lake (B. S. N. H., no. 4313); Pink- 
ham Notch (B. S. N. H., no. 5164); Saco Lake (B. S. N.B, 
nos. 4233, 4323); Mirror Lake, Chatham (Cushman Coll., nos. 
156, 157). 
