254 
Aug. F. Foerste 
This valve is, of course, shorter than the pedicel valve at the beak, 
but the amount of shortening in the individual is abnormal, and, 
no doubt, not a constant feature of the species. The same median 
and lateral flattening is observed as in the case of the pedicel valve; 
anteriorly, the median flattened part is radiately striated, on the 
interior, as though from the beak as a center. The muscular 
markings are indistinctly preserved. Such outlines as are sug- 
gested by the specimen at hand are indicated in the accompany- 
ing drawing (Fig. 11 B), and since these do not conform to any 
structure known among Lingulae it is very probable that these 
outlines are misleading and have no diagnostic value. 
Locality. Argillaceous brownish indurated bands, in the red 
clay shales in the lower Lowville section, on LaCloche peninsula, 
about a mile south of the contact of these shales with the quart- 
zites mapped by the Canadian Geological Survey as Huronian. 
The fossiliferous layers occur a few feet above railroad level. The 
types were collected by A. F. Foerste in 1912 and form number 
8403 and 8403a in the paleontological collections of the Geolog- 
ical Survey of Canada, in the Victoria Memorial Museum, at 
Ottawa. 
Outline closely resembling Lingula briseis, Billings, but that 
species is a much flatter and narrower shell. 
Lingula eva, Billings, is similar in the flattening of the median 
parts and also along the sides; but the sides are diverging rather 
than parallel anteriorly; nothing is known of the interior. Lingula 
vanhorni, Miller, is more attenuate posteriorly, more rounded 
anteriorly, and hence has a more ovate form. 
2. Lingula rectilateralis, Emmons 
Lingula rectilateralis was figured by Emmons in the Geological 
Report of New York, published in 1842, on p. 399. The only 
comment on this figure in the text is: Lingula rectilateralis, is 
associated with Triarthrus.^’ On the same page: Triarthrus heckii 
is stated to be ^‘abundant in gorges at Rodman and Lorraine, 
and upon the route from Adams to Tylerville, where the (Utica) 
slate is exposed. ’’ From these comments it is concluded that the 
specimen figured by Emmons came from the horizon of the black 
shale usually correlated with the Utica, and that it was obtained 
somewhere in the southern part of Jefferson county. 
