78 KANSAS ACADEMY OF SCIENCE. 
Gomphonema olivaceum, var. vulgaris. 
Gomphonema ventricosum. 
Homceocladia sigmoidea. 
Mastagloia smithii Thw., var. lacus- 
tris, Griin. (fig. 20, pl. IIT). 
Navicula amphiceros? (fig. 6, pl. II). 
Navicula bacillum. 
Navicula borealis (var. small, with nine 
coarse stri). 
Navicula brebissonii. 
Navicula cymbula Donk. 
Navicula elliptica. 
Navicula elliptica, var. oblongella (like 
fig. 24, pl. III). 
Navicula gracilis (Kg.) Griin. 
Navicula gregaria Donk. 
Navicula interrupta (Pinn.) S. W. 
Navicula lanceolata (Kg.), var. 
Navicula leptogongyla. 
Navicula longa. 
Navicula macra. 
Navicula mutica, var. goeppertiana. 
Navicula (large, coarsely marked, 
lanceolate, unknown). 
Navicula {No.11 of Schmidt’s 47, not 
named). 
Navicula (No. 13 of same, not named). 
Navicula (No. 15 of same, not named). 
Navicula (No. 22 of Schmidt’s 44, not 
named). 
Navicula (No. 23 of Schmidt’s 44, but 
rather coarser). 
Navicula (No. 32 of Schmidt’s 44, with 
some reserve). 
Navicula obtusata. 
Navicula pumila Griin. 
Navicula radiosa Kg. 
Navicula radiosa, var. acuta. 
Navicula rhomboides, var. 
tonema vulgare Thw.) 
Navicula rupestris (Pinn.) Grtin. 
Navicula smithii (?). 
Navicula subcapitata, var. stauronei- 
formis (fig. 22, pl. III). 
Navicula subinflata (fig. 25, pl. IIT). 
Navicula stauroptera. 
Navicula stauroptera parva Grtin. 
Navicula tabellaria. 
Navicula tenella. 
Navicula (unknown, perhaps naveana?). 
Nitzschia amphioxys. 
Nitzschia amphioxys, var. vivax (fig. 
2, pl. II). 
Nitzschia angustata. 
Nitzschia frustulum. 
Nitzschia heufleriana. 
Nitzschia hungaricum. 
Nitzschia sigma. 
Nitzschia stagnarum Rabh. 
Nitzschia triblionella. 
Pleurosigma gracilentum Rabh. 
Pleurosigma spencerii (fig. 18, pl. III). 
Pleurosigma sciotense. 
Pleurosigma kutzinghii. 
Synedra acus. 
Synedra crotonensis. 
Synedra danica. 
Synedra familiaris. 
Synedra (an end of, perhaps, Chaseii ?). 
Synedra pulchella, forma major. 
Synedra ulna. 
Total genera, 16; species, 100. 
( Colle- 
