. The Canadian journal of industry, science and art. THE DEVONIAN FOSSILS OF CANADA WEST. Strophomena incequistriata.—(Conrad.) Strophomena incequistriata —Conrad. Journal of the Academy of Natural Sciences of Fhiladelphia Vol. 8, p 254. PI. 14, fig. 2, 1839. Also compare the descriptions and figures in the same work of S. crebrtstriata ; S varistriata ; S. recti- LATERis and S. impressa.—Conrad. Also, S. varistriata; and S. varistriata, var. arata.—Hall. Pal. N. Y. Vol. 3, p. 180,184. Also the following in the 10th x\nn. Rep. Regents N. Y. Univ., S. inceciuiradiata ; S. texetilis and S. conca
. The Canadian journal of industry, science and art. THE DEVONIAN FOSSILS OF CANADA WEST. Strophomena incequistriata.—(Conrad.) Strophomena incequistriata —Conrad. Journal of the Academy of Natural Sciences of Fhiladelphia Vol. 8, p 254. PI. 14, fig. 2, 1839. Also compare the descriptions and figures in the same work of S. crebrtstriata ; S varistriata ; S. recti- LATERis and S. impressa.—Conrad. Also, S. varistriata; and S. varistriata, var. arata.—Hall. Pal. N. Y. Vol. 3, p. 180,184. Also the following in the 10th x\nn. Rep. Regents N. Y. Univ., S. inceciuiradiata ; S. texetilis and S. concava. — rig. 113. Fig. m.—Strophomena inaquistriaia.—Yentral view of one of the forms of this species 6., longitudinal section. Description.—Semi-circular, semi-oval, or sub-triangular, width on hinge-line varying from one to three inches ; length from two-thirds to seven-eighths of the width ; cardinal angles compressed, forming rounded or acute ears which are more or less extended. Ventral valve varying greatly in the amount and in the form of its convexity ; usually with the visceral disc depressed convex and the margin all round abruptly curved down for one-third or one-half the whole length of the shell; sometimes the shell uniformly arched from beak to front; the umbo often so greatly developed as to overhang the hinge- line and bring the area under the body of the shell; in other speci- mens the convexity of the umbo is continued along the middle to the front, producing a broad mesial carination ; in many the front is greatly produced in a gradual slope from the anterior margin of the disc, and occasionally we find specimens with the front margin so much curved as to be to some extent inrolled under the shell; in all the umbo is more or less prominent, there being a somewhat flat or depressed sub-concave space of greater or less extent on each side. Please note that these images are extracted from scanned page images that may have been digitally enhan
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