50 TRANSACTIONS OF THE ROYAL CANADIAN INSTITUTE. [VOL. XI 
One specimen is an internal cast, somewhat less gibbous but other- 
wise resembling Whiteaves’ species. 
Locality—Limestone rapids, Severn river, District of Patricia. 
Horizon—Silurian. | 
No. 386 S. Royal Ontario Museum of Palaeontology. 
GLASSIA VARIABILIS, Whiteaves, var. 
Plate III, Figure 11. 
One pedicle valve and one cast of the same. The specimen closely 
resembles the variety of G. variabilis described by Whiteaves from the 
Ekwan river in Volume III of Palaeozoic Fossils, page 252, Plate 26, 
Figures 6, 6a and 6b. Our specimen is larger and somewhat more 
elongate. Lacking any knowledge of the interior, I was at first inclined 
to ascribe the species to Barrandella, as it is distinctly more elongate, 
much more ventricose, and with a more prominent beak on the pedicle 
valve than the type of Glassia variabilts. 
Locality—Above Limestone rapids, Severn river, District of Patricia, Ontario. 
Horizon—Silurian. 
No. 400 S. Royal Ontario Museum of Palaeontology. 
TRIMERELLA EKWANENSIS, Whiteaves. 
TRIMERELLA EQUANENSIS, Whiteaves. Ottawa Naturalist, Vol. XVI, p. 141, pl. 2, figs. 1 
and 2; pl. 3, fig. 1, 1902. 
TRIMERELLA EKWANENSIS, Whiteaves. Geol. Sur. Can., Palaeoz. Foss., Vol. III, pt. IV, 
p. 249, pl. 24, fig. 7; pl. 25, figs. I and 2, 1906. 
TRIMERELLA EKWANENSIS, Parks. Bur. Mines of Ont., 22nd Rep., pt. I, p. 192, 1913. 
A single broken specimen of an internal cast, which, coming from 
this locality, may reasonably be referred to Whiteaves’ species, although 
the definite specific characteristics can scarcely be made out. 
Locality—Above Limestone rapids, Severn river, District of Patricia, Ontario. 
Horizon—Silurian. 
No. 387 S. Royal Ontario Museum of Palaeontology. 
RHYNCHOSPIRA LOWI, Whziteaves. 
RHYNCHOSPIRA LOWI, Whiteaves. Geol. Sur. Can., Palaeoz. Foss., Vol. III, pt. 1V, p. 277, 
pl. 25, figs. 8 and 9, 1906. 
One mould of the pedicle valve with part of the decorticated shell 
adhering. Apparently belongs to this species. 
Locality—Limestone rapids, Fawn river, District of Patricia, Ontario. 
Horizon—Silurian. 
No. 388 S. Royal Ontario Museum of Palaeontology. 
A more imperfect fragment of the brachial valve from the Limestone 
rapids of the Severn river is provisionally placed here. 
No. 389 S. Royal Ontario Museum of Palaeontology. 
