. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 238 valve convex, with a moderately hiji'h area, divided l»y an Oj)en delthyrinni. The teeth arise from the liottom of the valve as two erect divergent crests. Brachial valve sliiihtly concave, or nearly flat, with a low area, a prominent convex chilidinm, and a large cardinal process bilobed at the snm- mit. The brachidium consists of two slender descending lamelhe, which unite near the middle of the valve with a sharp, thin median septum, which, towards the beak, passes into a low median ridge. Surface of both v
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 238 valve convex, with a moderately hiji'h area, divided l»y an Oj)en delthyrinni. The teeth arise from the liottom of the valve as two erect divergent crests. Brachial valve sliiihtly concave, or nearly flat, with a low area, a prominent convex chilidinm, and a large cardinal process bilobed at the snm- mit. The brachidium consists of two slender descending lamelhe, which unite near the middle of the valve with a sharp, thin median septum, which, towards the beak, passes into a low median ridge. Surface of both valves plicated. Troimuoleptus cAKiXATi'S. (Courad.) (Fig. 150.) (Pal. N. Y., Vol. IV., p. 407. PL LXII.) Distinguishing Chnracters.— Strophomenoid outline; broad, simple, rounded plications, wider than the inter- spaces; broadly sub-carinate center of pedicle valve, caused by the greater width and prominence of the central plica- tion; longitudinally striated, convex chilidium of brachial valve; fine undulating concentric surface strifv, and occa- sional coarser imbricatin<i- lamelhe. '^-^^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buffalo Society of Natural Sciences. Buffalo, N. Y. : Buffalo Society of Natural Sciences
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