. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 336 M. ETHEL COCHRAN. feet proportionately small. The anterior foot has three'toes and an inner rudimentary one, while the posterior has four with one inner rudimentary toe. The body is not always lifted from the ground when the creature is walking—the tail never. Spelerpes bilineatus seems to be more slender than erythronotus, and^when a dusky salamander (Desmognathus fusca) is about, the dainti- ness of a red-back makes it seem as clumsily built as an Ambly- stoma. The most distinguishing feature of this species is the bro
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 336 M. ETHEL COCHRAN. feet proportionately small. The anterior foot has three'toes and an inner rudimentary one, while the posterior has four with one inner rudimentary toe. The body is not always lifted from the ground when the creature is walking—the tail never. Spelerpes bilineatus seems to be more slender than erythronotus, and^when a dusky salamander (Desmognathus fusca) is about, the dainti- ness of a red-back makes it seem as clumsily built as an Ambly- stoma. The most distinguishing feature of this species is the broad dorsal band of color that varies from bright, brownish-red to a sort of pale, dead-leaf brown. Age seems to make no difference. Red-backs. (Natural size.) (Photographed by Dr. Miller.) in the color, nor has any sex differentiation been observed in fall and early spring. Two peculiar specimens found in company with several normal ones, in widely separated spots, were of a bright vermilion red, similar to the color of young Diemyctylus, over all the dorsal surface; the tail alone was a dark brown. It was probably a chance variation, as it seemed normal in every other respect. The sides of the body and much of the tail are of a dark gray- brown finely flecked with silver spots that grow more numerous toward the ventral side where the color is almost white, varied with a few darker spots. The ventral part of the tail and legs is much darker than the belly, while the dorsal surface of the. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laborato
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