




1891.] The Vermilion-Spotted Newt. 1109 
‘78. Breeding Habits of Salamanders and Frogs. AMER. NATURALIST, 
Vol. XII. (1878), pp. 399, 400. Says the eggs of Diemyctylus are in 
bunches. 
WuirtMaN, C. O.—’85. Methods of Research in Microscopical Anatomy 
and Embryology. Boston, 1885. Describes ovulation of Diemyctylus, and 
expresses the belief that the fertilization is internal (p. 156). 
WILDER, Burt G.—’76. On the Respiration of Amia. Proc. Amer. 
Asso. Adv. Sci., Vol. XXVI. (1876), pp. 306-313. “The normal breath 
contains rather more than one per cent. of carbonic acid ; but much more 
of the oxygen has disappeared than can be accounted for by that amount 
of acid. We may infer that with Amia the (carbonic acid) gas is partly 
excreted by the gills.” See Mark (’90), and Gage, S. H. and S. P. (’8s, 
"86, *88) 
ZELLER, E.—'go and ‘91. Ueber die Befruchtung bei den Urodelen. 
Zeitschrift fiir wissenschaftliche Zoologie, Bd. 49, 1890. Gives an excellent 
account of the history of knowledge concerning the fertilization of European 
salamanders, and describes anew and more fully that of several. The 
spring spermatophores of Diemyctylus are also described, and apparently 
for the first time. In Bd. 51 (1891), p. 735, some corrections are made of the 
first paper and he concludes that the zoosperms pass from spermatophore by 
their own activity into the cloaca of the female, and are not taken into the 
cloaca in any active way by her. 
Besides the above, general and specific information may be obtained 
concerning batrachians in the American Cyclopedia; the Encyclopedia 
Britannica; the Dictionnaire Universel d'Histoire Naturelle, by Ch. — 
D’Orbigny ; in Wood's Natural History, and in the Standard Natural 
History by Kingsley ; in Brehm’s Thierleben, second edition. 
EXPLANATION OF PLATE. (FRONTISPIECE.) 
Transformation of Diemyctylus viridescens. Drawn from photographs and 
colored from nature by Mrs. Gage. All are natural size, except Fig. 2 and 
the vermilion spot, Fig. 5. 
Fic. 1.—Branch a Ceratophyllum with Diemyctylus eggs between the 
needle-like divisions of the leaves; also nearly bare stem of Anacharis with 
egg attached 
Fic. 2.—Diemyctylus egg, in the yolk-plug stage of development, 
attached to an Anacharis leaf. It was from an isolated female, and the 
parchment-like envelope is ovoid. Outlined with an Abbé camera lucida, 
and magnified about seven diameters. 
Fig. 3.—Dorsal, ventral, and lateral views of a larval Diemyctylus in 
August and September. The gills are considerably atrophied, and the 
coloration and vermilion spots resemble the adult. 

