P. T. Cleve: The Diatoras of Finland. 53 



A. minutum CI. n. sp. — Valves elliptic with rounded ends, 

 0,0 2 9 m. m. in length and 0,oi m. m. in breadth. Upper valve with 

 a linear area, dilated in the middle to a round space. Strioe al- 

 most parallel, 25 in 0,oi m. m. Lower valve with 20 stria} in 

 0,oi m. m. on the middle, all equal, and about 25 stria) in O.oi 

 m. m. at the ends. 



PL III, fig. 6, 7. 



This species, of which the lower valve has a great resem- 

 blance to Navic. Rotseana var. oblongella, occurs on the shores 

 of the lake Lojo (Ab. 48). — I have found the same species in 

 the lake Wenern (Christinehamn, Sweden). 



Rhoicosphenia Grun. 



R. curvata (Kiitz.) Grun. — V. H. XXVI, 1 



Sinf. 76, Sinb. Ob. 83. 



Amphora Ehb. 



A. ovalis Kiitz. — V. H. I, 1. 



Ab. 37,100, Lad. 85, 86, Kon. 41, 42, Sinb. Ob. 83. 



Foss. Nyl. 87, Tb. 90, Ob. 91, 92. 



Var. affinis Kiitz. — V. H. I, 2. 



Ab. 36, Lad. 63, Kon. 41, 42, Lt. 31, Sinb. Ob. 83. 



Foss. Lk. 104. 



Var. globosa Schum. — 1867, I, 24. 



Lt. 31, Sinb. Ob. 83. 



Var. Pediculus Kiitz. — V. H. I, 4-10. 



Ab. 46, 47, 48, Sinb. Ob. 83. 



A. commutata Grun. — V. H. I, 14, 



Mb. Ab. 100. 



A. sulcata (Breb.) Greg. 



Sinf. Nyl. (Dannf... 



A. salina \\ . Sm. — V. H. I, 19. 



Al. 58. Sinf. Nyl. (Dannf.). 



