372 
The American Geologist. 
December, 1001 
17. Proboscina aiiloporoidcs (Nicholson). 
18. Platystrophia bifrata-lynx (Eichw.). 
19. Platystrophia biforata-laticosta (Meek). 
20. Hebertella occidetanlis-sinuata Hall. 
21. Zygospira modcsta Hall. 
22. Rafinesquina alternata-pondcrosa. 
23. Rafinesquina altcrnata-nasuta. (Con.). 
24. Crania scabiosa Hall. 
25. Conchiolites sp. 
26. Cyrtolitcs inornatus Hall. 
27. Megambonia jamesi Meek. 
In addition to the species in the above lists, a miscellan- 
eous collection from zones a to h, inclusive, contains the 
following species: 
I. Heterotrypa paupera (Ulrich) 
Dekayia magna n. sp. 
Dekayella cystata n sp. 
Aniplc.ropora scptosa (Ulrich). 
Dekayia pelliculata Ulrich. 
Callopora andrcwsi (Nicholson). 
Homotrypa obliqua Ulrich. 
Batostoma varians Qames) ? 
Proboscina frondosa (Nicholson). 
Trematis sp. 
Beyrichia cliambersi ? 
Stomatopora inflata (Hall). 
Plcctortlns clla Hall. 
Orthocreas sp. 
It is of interest to compare this section with that of Ulrich* 
at Cincinnati, especially since the latter is the type section for 
this part of the Upper Ordovician of the Ohio valley. 
These two sections (Cincinnati and Vevay) may be tabu- 
lated as fallows : 
430' 
400' 
385' 
370' 
360' 
Tabulation of Ulrich's Section at Cincinnati. 
Platystrophia lynx and numerous bryozoa. "~| 
30' 
15' 
15'' 
10' 
50' 
Callopora ramosa, C, rugosa. Bythopora gracilis, 
Heterotrypa iniiecta, Peronopora compressa, 
Dekayia appressa, etc., Ambonychia jamesi, etc. 
Strophomena nasuta. 
Strophoinena ponderosa. 
Atactoporella mundula, Constellaria constellata, 
Leptotrypa discoidea, hscharopora pavonia, 
Plectorthis plicatella. P. ella, Cyclonema bilix, 
Platystrophia crassa, Anodontopsis unionoides. 
^XII b. 
Iv 
XII a. 
*Am. Geol., vo). j, pp. 305-315; toI. ii, pp. 39-44. 
