64 
VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
Platycolfus dubius, (Billings). 
Bathyurus dubius , Billings, 1860. Canadian Naturalist and 
Geologist, Yol. Y, p. 319, fig. 21. 
Differs from P, capax in having a more pointed glabella and 
a wire-like rim. It is found in pebbles at Point Levis, and a 
similar but larger specimen was found by Richardson at Cow 
head, Newfoundland. 
Platycqlpus barabuensis, (Whitfield). 
Dikelocephalus barabuensis , Whitfield, 1878. Annual Report 
Geological Survey of Wisconsin for 1877, p. 63. 
Similar to P. dubius , but with a more convex glabella and 
faint traces of glabellar furrows. Same horizon and locality as 
P. eatoni. 
Family Agraulid/E. 
Genus Plethopeltis nov. 
(pleiho, to be full; pelta , a half -moon shield.) 
Generic Diagnosis. 
Cephalon strongly convex, wider than long, without concave 
border or marginal rim. Glabella faintly defined, without 
glabellar furrows. Eyes small, situated well forward. Free 
cheeks rather wide, smooth, with short spines at the genal 
angles. Pygidium small, with few traces of segmentation; 
convex, no border. 
Type: Agraulos saratogensis, Walcott. 
Plethopeltis saratogensis, (Walcott). 
Agraulos saratogensis, Walcott, 1890. Proceedings of the 
U.S. National Museum, Yol. XIII, p. 276, PI. XXI, 
fig. 14. 
This species is found in the upper Cambrian Hoyt limestone 
near Saratoga Springs, and in the upper part of the Kittatinny 
limestone (upper Cambrian), near Blairstown, New Jersey. 
