50 
AUG. F. FOERSTE 
B. THE FAUNA OF THE WHIRLPOOL SANDSTONE OF ONTARIO 
Very little is known of the fauna of the Whirlpool sandstone, 
the lowest member of the Medinan in southern Ontario. In 
1919 Dr. M. Y. Williams^ listed only the following species from 
this sandstone: 
Gasteropoda 
Pleiirotomaria sp. Niagara River 
Hormotoma subulata (Conrad) ?? Glen William 
Vermes (burrows and trails) 
? Cornulites 
From the Grimsby sandstone, in the upper part of the Medinan, 
he listed: 
Brachiopoda 
Lingula cuneata Conrad 
Lingula clintoni Vanuxem 
Dalmanella eugeniensis Williams 
Camarotoechia (Stegerhynchus) neglecta Hall 
Pelecypoda 
Pterinea cf. undata (Hall) 
Pterinea brisa Hall 
Modiolopsis primigenia (Conrad) 
Modiolopsis orthonota (Conrad) 
Modiolopsis kelsoensis Williams 
Ctenodonta machaeriformis (Hall) 
Nuculites cf. ferrugineum Foerste 
Gasteropoda 
Bucanella trilobata (Conrad) 
From the overlying Thorold sandstone, at the top of the Medi- 
nan, he listed: 
Worm burrows 
Daedalus archimedes (Ringueberg) 
Arthrophycus alleghaniensis (Harlan) 
® Williams, M. Y., The Silurian Geology and Faunas of Ontario Peninsula and 
Manitoulin and Adjacent Islands: Memoir 111, Geol. Surv. Canada, p. 28, 1919. 
I 
