. Annual report. New York State Museum; Science; Science. SOME NEW DEVONIC FOSSILS 275 nouncecl. These are characters of L. m a g n i f i c a not of L. perplana. Concentric wrinkles on the shell are altogether absent. 2 The cardinal area is denticulate to its extremities though nar- tow and but slightly cross striated; the delthyrium is open. 3 The muscle scars are not greatly divergent but, as in L. m a g - n i f i c a , are contracted at the beginning though they extend more than halfway across the shell. The shell is essentially a diminutive expression of that species, its fundamental struc
. Annual report. New York State Museum; Science; Science. SOME NEW DEVONIC FOSSILS 275 nouncecl. These are characters of L. m a g n i f i c a not of L. perplana. Concentric wrinkles on the shell are altogether absent. 2 The cardinal area is denticulate to its extremities though nar- tow and but slightly cross striated; the delthyrium is open. 3 The muscle scars are not greatly divergent but, as in L. m a g - n i f i c a , are contracted at the beginning though they extend more than halfway across the shell. The shell is essentially a diminutive expression of that species, its fundamental structure being quite in harmony with it and its y. Leptostrophia magnifica protype p a r v a lesser variety t a r d i f i from the Perce rock. In our material an occasional specimen indicates the presence of individuals larger than these we have figured. Dr Drevermann, after examination of these specimens, finds this shell closely approaching L. ex- planata Sowerby of the Coblentzian though that shell attains more nearly the dimensions of L. magnifica and has flatter rather than threadlike striae on the surface. Lower Devonic. Edmunds Hill, Chapman Plantation, Me. Strophonella (Amphistrophia) continens nov. Strophomena punctulifera Conrad, var. Billings. Palaeoz. Foss. 1874. v. 2, pt 1, p. 32 Shell rather strongly concavo-convex, the normal convexitv of the ventral valve being continued for about one third the length of the shell. The reversal is gradual but becomes abrupt specially. 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 New York State Museum. Albany : University of the State of New York
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