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VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
river 3 miles west of Clayton, and was collected by Mr. E. J . 
Whittaker. 
Bathyurus superb tjs, Raymond. 
Bathyurus superbus , Raymond, 1910. The Ottawa Naturalist, 
Vol. XXIV, p. 129, pi. II, figs. 1-3. 
This species is characterized by its smooth test, short genal 
spines, the wide concave border of the pygidium, which border 
is, however, crossed by the ribs, and by the short and wide ceph- 
alon and pygidium. It attains a larger size than any other 
known Bathyurus. It has so far been found only near Ottawa, 
Ont., at a horizon about 35 feet below the top of the Pamelia 
formation. 
Bathyurus longispinus, Walcott. 
Bathyurus longispinus , Walcott, 1879. 28th Report New 
York State Museum, p. 94. 
This species is characterized by its very long and wide genal 
spines, pustulose surface, and short and wide pygidium. It 
occurs in the Leray-BIack River, at Newport, New York. 
Bathyurus amplimarginatus, Billings. 
Bathyurus amplimarginatus, Billings, 1859. Canadian Natur- 
alist and Geologist, Vol. IV, p. 365, figs. 12a, 12b. 
Bathyurus minganensis, Billings, 1865. Palseozoic Fossils of 
Canada, Vol. I, p. 353. 
A comparison of the types show that these species should be 
united. The most prominent characteristic of the species is the 
very broad concave border of the pygidium. This border is not 
crossed by the ribs. The species has been reported only from 
the Beekmantown on the Mingan islands, but was found re- 
cently by Mr. Elfric Drew Ingall and the writer at Rockland, 
Ontario, in the lower part of the Beekmantown as exposed there. 
