308 
Aug. F. Foerste 
width of about 15 mm. near the basal margin, and is distinct 
even close to the beak, although this may be only an individual 
characteristic. The beak is broader and far less acute than is 
indicated in the figure of the type presented in the second volume 
of the Paleontology of Ohio. The anterior outline, however, is 
closely similar. The umbonal ridge is rounded, not angular, and 
the posterior margin is more evenly rounded posteriorly. Con- 
centric striae or low narrow undulations fairly distinct anteriorly, 
becoming fainter along the umbonal ridge and on the cardinal 
slope. 
Length 32 mm. ; height at posterior end 18 mm. ; height at beak 
20 mm.; extension of shell anterior to beak about 3 or 4 mm.; 
length of lunule about 7 or 8 mm. 
Type of the variety here described: Riviere des Hurons, near 
St. Jean Baptiste, collected October, 1872, by Thomas Curry. 
Preserved in the collections of the Geological Survey of Canada, 
in the Victoria Memorial Museum, at Ottawa. No. 8407. 
Specimens apparently identical with Cuneamya brevior occur 
half a mile south of St. Hilaire station, in a ditch along the road, 
a mile and a half northwest of Vars at a crossing of two country 
roads. Along the Nicolet River, southwest of Ste. Monique, in 
the lower part of the Proetus chambliensis zone. 
41. Archinacella clochensis, sp. nov. 
{Plate II, Figs. 6 A, B) 
Among described species, this form most nearly approaches 
Archinacella orhiculata, Hall, from the lower Trenton or Snake 
Hill shale of eastern New York, and Archinacella subrotunda, 
Ulrich and Scofield, from the Ctenodonta bed of the Black River 
group in Minnesota. 
Shell suboval, about 13 mm. long, 11 mm. wide, and slightly 
over 4 mm. high. Obliquely subconical, with the apex about 1 or 
1.5 mm. vertically back from the anterior margin. In profile 
view, moderately concave between the apex and the anterior 
margin, and rather evenly convex between the apex and the pos- 
terior margin. The area of highest elevation is not at the apex 
but about 3 mm. posterior to the same. This profile view agrees 
most closely with that presented by Ruedemann of one of the types 
