ORDOVICIAN FAUNAS. 145 
LINGULA PHILOMELA Bill. ? 
Plate IX., Fig. 7. 
1862. Lnngula philomela Billings, Pal. Foss., vol. L., p. 49, fig. 53. 
1893. Lingula philomela Winchell and Schuchert, Pal. Minn., pt. 
I., p. 342, pl. 29, figs. 7-8. 
A few imperfect specimens of a much larger species of Lingula 
than the last have been noticed in the New Jersey collections. This 
species attains a length of nearly 25 mm., with a breadth of 11 mm. 
It has much the form of LZ. philomela, and is therefore provisionally 
identified with that species. 
LINGULASMA GALENENSIS W. & S: 
Plate IX., Figs. 10-11. 
1892. Lingulasma galenensis Winchell and Schuchert, Am. Geol., 
vol. [X., p. 285. 
1893. Lingulasma galenensis. Winchell and Schuchert, Pal. Minn., 
De. Sec otepl aOss tes. iad 
Description.—Shell large, subquadrangular in outline, both valves 
convex. Anterior margin slightly convex, rounding narrowly at the 
sides into the straight, subparallel, lateral margins, the posterior 
margin convex, the postero-lateral angles rounded. Brachial valve 
more convex than the pedicle, the posterior third of its interior greatly 
elevated, as a concave platform, which is excavated in front and sup- 
ported medially by a septum, which terminates at about the centre 
of the valve. 
The dimensions of the only specimen observed are: length, 29 mm. ; 
breadth, 24 mm.; convexity of brachial valve, 10 mm. 
Remarks.—A single, imperfectly-preserved internal cast of this 
species has been observed. ‘The internal characters of the brachial 
valve are fairly well exhibited, showing the form of the platform 
and the mesial septum. The pedicle valve is so badly crushed that 
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