1925] 
St over: A Synopsis of the Amphibia of California 
293 
1923fr. The geographical distribution of amphibians. Am. Naturalist, 57, 129- 
136. 
Shown to accord closely with principles set forth by Matthews 
regarding northern origin of mammalia. 
Eisen, G. 
1897. Plasmocytes: The survival of the centrosomes and archoplasm of the 
nucleated erythrocytes as free and independent elements in the blood 
of Batrachoseps attenuatus Esch. Proc. Calif. Acad. Sci., ser. 3, 
zool., 1, 1-72. 
1900a. A preliminary account of the spermatogenesis of Batrachoseps attenu- 
atus, polymorphous spermatogonia, auxoeytes, and spermatocytes. 
Biol. Bull., 1, 99-113, 16 text figs. 
1900&. The spermatogenesis of Batrachoseps, polymorphous spermatogonia, 
auxoeytes, and spermatocytes. Jour. Morph., 17, 1-117, pis. 1-14, 
several text figs. 
Ellis, M. M., and Henderson, J. 
1913. The amphibia and reptilia of Colorado. Univ. Colorado Studies, 10 , 
39-129, pis. 1-8, 3 figs, in text. 
1915. Amphibia and Reptilia of Colorado, Part II. Ibid., 11 , 253-263, pis. 
1 - 2 . 
Emmel, Y. E. 
1920. The erythrocytic and leucocytic elements in the blood of Batrachoseps 
attenuatus. Anatomical Record, 18 , 232. 
Engelhardt, G. P. 
1916. Amblystoma tigrinum on Long Island. Copeia, no. 32, pp. 48-51. 
Description of eggs and spawning at Syosset, Long Island, N. Y. 
1917. Grand Canyon notes. Copeia, no. 39, pp. 5-7. 
Life-history notes on Bufo punetatus and Hyla arenicolor. 
1918. Batrachians from southwestern Utah. Copeia, no. 60, pp. 77-80. 
Life-history notes on 6 species at Bellevue, Washington County. 
Eschscholtz, F. 
1829-33. Zoologiseher Atlas, enhaltend Abbildungen und Beschreibungen neuer 
Thierarten, wahrend des Flottcapitains von Kotzebue zweiter Reise 
um die Welt, auf der Russiseh-Kaiserlichen Kriegsschlupp Pred- 
priaetie in den Jahren 1823-1826 (Berlin, G. Reimer), 5 parts, part 
5, 1833 (edited and partly written by Martin Heinrich Rathke), 
pp. i-viii + 1-28, pis. 21-25. 
The earliest and one of the important works on California am- 
phibia; Salo,7na7idrina attenuata [= Batrachoseps attenuatus'], Tri- 
ton [= Dicamptodon] ensatus, and Triton [— Triturus] torosus are 
here first described, and the anatomy given in some detail. 
Esterly, C. O. 
1904. The structure and regeneration of the poison glands of Plethodon. 
Univ. Calif. Publ. Zool., 1, 227-268, pis. 20-23. 
Evermann, B. W. 
1897. U. S. Fish Commission investigations at Crater Lake. Mazama (Port- 
land, Oregon), 1, 230-238. 
Remarks on two species of amphibians. 
