Trenton Gasteropoda of Manitoba. 323 
Reindeer Island, by Mr. Dowling, in 1890, but no specimens 
have yet been collected, in place, in the Trenton limestone 
of Manitoba. 
BucANIA BIDORSATA. 
Bucania bidorsata, Hall. 1847. Pal. St. N. York, vol. 1, p. 186, pl. xl, 
figs. 2 a-g. 
Birch Island, Kinwow Bay, Lake Winnipeg, Messrs. 
Dowling & Lambe, 1890: one specimen. 
CYRTOLITES COMPRESSUS. 
Phragmolites compressus, Conrad. 1838. Ann. Rep. N. York St., p. 119. 
Cyrtolites compressus, Hall. 1847. Pal. St. N. York, vol. 1, p. 188, pl. x1, 
figs. 2 a-f. 
Lower Fort Garry, Dr. R. Bell, 1880: one small but well 
preserved and very characteristic specimen. Hast Selkirk, 
A. MacCharles, 1884: a large cast of the interior of the 
shell. 
EUNEMA STRIGILLATUM. 
EHunema strigillata, Salter. 1859. Geol. Sury. Can., Can. Org. Rem., 
\ 
“Dee. 1, p. 29, pl. vi, fig. 4. 
i se Billings. 1863. Geol. Canada, p. 145, fig. 88. 
Lower Fort Garry, T. C. Weston, 1884: one nearly per- 
fect and well preserved specimen. 
HELICOTOMA PLANULATA, 
Helicotoma planulata, Salter. 1859. Geol. Surv. Can., Can. Org. Rem., 
Dec. 1, p. 14, pl. ii, figs. 5-7. 
Hast Selkirk, A. MacCharles, 1884: one good specimen, 
with the test preserved. 
TROCHONEMA UMBILICATUM. 
Pleurotomaria umbilicata, Hall. 1847. Pal. St. N. York, vol. 1, pp. 43 
and 175, pls. x, figs. 9 a-b, & xxxviil, 
figs. 1 a-g. 
Trochonema umbilicatum, Salter. 1859. Geol. Surv. Can., Can. Org. 
Rem., Dee. 1, p. 27, pl. vi, fig. 3. 
a a Billings. 1863. Geol. Canada, p. 145, fig. 92. 
