56 TRANSACTIONS OF THE ROYAL CANADIAN INSTITUTE. [VOL. XI 
shows a distinct furrow, which must represent a considerable revolving 
ridge projecting inwards from the inner side of the whorl. This form 
shows considerable resemblance to Bellerophon nautarum, Salter.) 
Locality—Limestone rapids, Severn river, District of Patricia, Ontario. 
Horizon—Silurian. 
No. 356 S. Royal Ontario Museum of Palaeontology. 
BELLEROPHON (CYMBULARIA), sp. indet. 
Plate IV, Figures 6 and 7. 
This species is represented by four fragmentary specimens, all casts 
of the interior, of which none show the characters of the aperture. Even 
the generic relations are therefore doubtful, but the general shape of 
the casts suggests Bellerophon as redefined by Ulrich. The forms re- 
semble very closely some of the species referred to Cymbularia of Koken. 
The forms are closely convolute with about three whorls and a very 
small umbilicus. The whorls expand rather rapidly to the aperture, 
which does not seem to be greatly enlarged. The dorsum is marked by 
a distinct but slightly elevated band, which increases in prominence 
towards the aperture. Transverse lines of growth cross the dorsum 
almost at right angles. 
The specimens are all so fragmentary that a specific name would 
not be justified; the closest resemblance is presented by Cymbularia 
rotunda, Barrande sp. Systéme Silurien de la Bohéme, Vol. IV, p. 154, 
Pl. 86, Figs. 14-17. 
Locality—Limestone rapids, Severn river, District of Patricia, Ontario. 
Horizon—Silurian. 
No. 355 S. Royal Ontario Museum of Palaeontology. 
MEGALOMPHALA ROBUSTA, Whiteaves. 
MEGALOMPHALA ROBUSTA, Whiteaves. Geoi. Sur. Can., Palaeoz. Foss., Vol. III, p. 257, 
pl. XXVIII, figs. 9 and 9a, pl. XXIX, fig. 1, 1906. 
MEGALOMPHALA ROBUSTA, Parks. Bur. Mines, Ont., 22nd Rep., pt. I, p. 194, 1913. 
The species is represented by a single broken cast of the interior, 
but I have little doubt as to the correctness of the identification. 
Locality—Limestone rapids, Severn river, District of Patricia. 
Horizon—Silurian. 
No. 353 S. Royal Ontario Museum of Palaeontology. 
1 Sutherland, Journal of a Voyage, etc., app., p. ccxxiii, pl. 5, fig. 25. 
