1915- No. 12. THE STROPHOMENIDAE OF THE KRISTIANIA REGION. 



From Staçe : 



Leptaetia transversalis Dalm 



— — Dalm. var. \miuor) . 



— — Dalm. var. {major) . . 



— — Dalm. var. Z)//:'a/;Y Dav. 



— j-costata M'CoY 



— ^P 



Triplecia insularis Eichw 



Streptis sp 



X 

 X 

 X 



X 



X 

 X 



X 



X 



Finally the present author in ^ Studien über die Etage 4 beim Mjösen^ ^ 

 cites the following Strophomenids from Stage 4 of the Mjösen district: 



Triplesia insularis Eichw. 

 Leptaena sericea Sow. 



— sericea var. rhombica M'Coy. 



— convex a Pand. var. 



— äff" ienuissime-striata M'Coy. 



— aâ'. Schmidti Torno. 



Strophotncna Asmnsi \'ern. 



— imbrex Pand. 



— deltoidea Conr. var. undata M'Coy. 



— rhomboidalis Wilck. var. tenuistrata Sow. 



— — » var. riigosa Dalm. 



The total number of Strophomenids so far cited from the Ordovicic- 

 Siluric series of the Kristiania region, according to the lists given above, 

 amounts to about 40, but many of these have not been specifically deter- 

 mined or distinctlv named. 



1 Videnskapsselskapets Skrifter. I. Math.- Nature-. Kl. 1909. 



