1915] PALAEOZOIC FOssILS FROM Hupson Bay. 15 
of the sharply defined elevation on the floor of the calyx. The speci- 
mens have some resemblance to Strephodes pickthorni, Salter, but 
they differ in the absence of longitudinal striz on the outer surface 
and in their greater size. Our forms also are more elongate and present 
fewer septa for a given diameter. 
Locality—Lower rapids, Shamattawa river, Manitoba. 
Horizon—Ordovician. 
No. 286 S. Royal Ontario Museum of Palaeontology. 
BRYOZOA 
MONOTRYPA CUMULATA, Ulrich. 
Monotrypa (CHAETETES) CUMULATA, Ulrich. Geol. Sur. Minn., Pal. Vol. III, pt. 1, 
p. 307, pl. X XVII, figs. 26 and 27, 1895. 
Cf. DIANULITES PETROPOLITANA, Dybowski. Die Chaetetiden der Ostbaltischen Silur- 
: Formation, p. 24, pl. 1, figs. 4 and 5, 1877. 
Cf. DIANULITES PETROPOLITANA, Bassler. U.S. Nat. Mus., Bull. 77, p. 232, Plate 2. 
figs. 4-6a; pl. 10, figs. 7-11; text figs. 129-132, 
IQII. 
One fragment about 60 mm. by 45 mm. by 10 mm., apparently 
belonging to a sub-hemispherical polyzoarium. Tangential and vertical 
sections of this specimen were submitted to Dr. Ray S. Bassler of the 
United States National Museum, who has kindly communicated the 
following determination: ‘‘ The bryozoan is closely related to Monotrypa 
cumulata, Ulrich, from the Mohawkian rocks of Minnesota. In my 
Baltic Province bulletin you will find this species listed as a synonym 
under Dianuliies petropolitana. Your species is too little different to 
make even a good variety’’. 
Locality—Lower rapids, Shamattawa river, Manitoba. 
Horizon—Ordovician. 
No. 420 S. Royal Ontario Museum of Palaeontology. 
ESCHAROPORA (?), sp. andet. 
One small fragment showing round pores arranged diagonally. 
Four occur in the space of one mm. The surface is worn and identifi- 
cation therefore impossible. 
Locality—Lower rapids, Shamattawa river, Manitoba. 
Horizon—Ordovician. 
No. 412 S. Royal Ontario Museum of Palaeontology. 
1Sutherland’s Journal of Captain Penny’s Voyage to Wellington Channel, etc., 
Vol. II, Appendix, p. CCXXX, pl. 6, fig. 5, 1852. 
