122 
168. C. Kuetzingii, Breb., p. 47, Pl. VIII.—Specimens 17 x 
460. Pushaw stream. Oct., 1890. | 
169. Docidium Baculum, (Breb.), D. By., p. 49, Pl XL— — 
Ends truncate, sides nearly parallel, vacuoles absent. The meas: — 
urements 25 x 425 in our specimens. Spring in meadow, col — 
lege farm. Oct, 1891. 
170. Cosmarium galeratum, Nord., p. 70, Pl. XVI.—Spring, — 
college meadow. Oct., 1891. 
171. Cosmarium protractum, (Neg.), Archer., p. 83, Pl. XVII 
—Meadow spring, college farm, Orono, Me. Oct., 1891. 
172. C. Beckei, Wolle, Pl. L._—Our specimens only 1.5 
_ yd, and the cytoplasm collected in a ball. Meadow spring, col- 
lege farm. Oct., 1891. 
173. Xanthidium armatum, (Breb.) Ralfs, p. 92, Pl. XXI— 
Spines shorter than figured by Wolle, but much like fig. 2; omly — 
45-50 «. Johny Mack Brook, Orono, Me. Oct. 1890. 
174 Euastrum Pokornyanum, Grun., p. 104, Pl. XXVU— | 
Spring, college meadow, Orono, Me. Oct., 1891. 
175. £. pingue, Elf., p. 105, Pl. XXVII.—With the above. 
Orono, Me. Oct., 1891. 
176. Micrasterias fimbriata, Ralfs, forma, nuda, Wolle, p- _ 
110, Pl. XXXVI., Fig. 4.—Our specimens 275 MM d. Pushaw — 
stream, near the lake ; among alge attached to submerged sticks. 
Oct., 1890. 
177. Staurastrum aviculum, Breb., p. 123, Pl. XL, vee 4 
brevispinum, n. var., Pl. 1., Fig. 13.—The type of this species 
was reported in Article I., No. 52, but since then we have found a 
var. brevispinum, which differs from the type by being larger 
(35 4d); the spines shorter and thicker, and the sides of the 
end view concave. None of the type form were found with this 
Pushaw stream, among alge, F.-L. Harvey. Oct., 1890. 
178. S. polymorphum, var. PENTAGONUM, n. var. 
__ Broadly elliptical, sides tapering gradually into three process — 
tipped with spines ; end view pentagonal; angles blunt and tippee 
with three spines; diameter 48 uw. Sphagnum swamp, college. _ 
farm.” FT Harvey. 1890. a: 
The more convex ends, larger size and pentogonal end ver 
separate it from the type, with which we did not find it assocy — 
ated. See fig. 14, side view; fig. 15., end view. a 
