1901) MICROSCOPICAL JOURNAL. 267 
var. intermedia; angustatum, var. producta, Grun; commutatum ; 
constrictum ; gracile, forma parva; lagenula Kg.; mexicanum Grun,; 
obtusatum ; olivaceum; parvulum; paryulum, var. subcapitata. Mel- 
osira lyrata, var.(?). Meridion circulare. 
Navicula acrospheria, var.(?); arenaria Donk.; bacilliformis; biceps 
Ehr.; brebissoni; cuspidata; decurrens (Pinn.); divergens, forma 
minor; elliptica, var. oblongella; flanatica; gibba (Pinn.); hemiptera; 
interrupta ; lanceolata; lanceolata, var. much smaller; mesolepta ; 
- nodosa, var.; No. 15; No. 44; No. 45; No. 55, Schmidt’s Atlas, pl. 7, 
with some reserve; oculata; oblonga; peregrina; producta; pseudo- 
bacillum ; radians; radiosa; radiosa, var. acuta; retusa; rhyncoce- 
phala ; rostellata ; small, elliptical, coarsely marked ; ‘schumanniana ; 
stauroneiformis; stauroptera; stomatophora Grun.; subinflata; tabel- 
laria Grun.; trinodis ; ventricosa, forma minuta; viridis (Pinn.); viri- 
dula Kg., forma minor. 
Nitzschia frustulum; sigma; small, unknown, coarse markings. 
Pleurosigma spencerii. Stauroneis anceps ; phcenicenteron ; unknown, 
small. Surirella apiculata; molleriana; ovata; ovata, var.; panduri- 
formis ; suevica. Synedra crotonensis ; danica ; familiaris ; pulchella ; 
superba ; ulna, var. longissima ; ulna, var. vitrea.—Total genera, 21; 
species, 108. 
Many more might undoubtedly be discovered by devot- 
ing time to the more thorough examination of the slides, 
as I never sit down to them without finding something 
new. As sixty species is a fair average for the best 
gatherings, it will be seen that this at Gage’s pond was 
unusually good. A gathering made at Silver Lake, twelve 
miles west of Topeka, yielded much the same forms, ex- 
cept that in a half-inch mount of it only two Hpithemia 
gibba were observed, and with the following additions: 
Achnanthes hudsonis; exilis; lanceolatum. Cocconema cistula (a 
new variety). Cyclotella comta; meneghiniana. Cymatopleura api- 
culata. Encyonema triangulum. Fragellaria turgens. Gomphonema 
affine, forma major; gracile. Melosira crenulata; varians. Navicula’ 
ambigua ; ampliata ; confervacea, var. peregrina, Grun.; lanceolatum ; 
spherophorum. Nitzschia dissipata ; hungarica; paradoxa; sigmo- 
idea ; tryblionella, forma minor; tryblionella forma densus striate ; 
tryblionella, var. victoriae, Pleurosigma eximium ; hippocampus(?); 
delicatulum. Surirellaintermedia. One additional genus, Cyclo¢ella, 
and twenty-nine species. 
For Sale-— A Beck stand with three lenses, very little 
used. Price $10. Address: G.W. Wilcox, care this office. 
