P. T. Cleve : The Diatoms of Finland. 



53 



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

 0,029 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. Striae al- 

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

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



Rlioicosphenia Grun. 



It. curvata (Kutz.) Grun. — V. H. XXVI, 1. 

 Sinf. 76, Sinb. Ob. 83. 



Amphora Ehb. 



A. ovalis Kutz. — V. H. I, 1. 



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



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 W. Sm. — V. H. I, 19. 



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



