t 
1106 The American Naturalist. [December, 
’86 and '88. Combined Aérial and Aquatic Respiration. Science, Vol. 
VII. (1886), p. 394; and in the Reference Hand-Book of the Medical 
Sciences, Vol. VI. (1888), p. 197. The generalization is made that in case 
of combined aérial and aquatic respiration “the aérial part is mainly to 
supply oxygen, and the aquatic part to get rid of carbon dioxide.” See also 
Wilder, ’76, and Mark, ’go. 
"go. Changes in the Ciliated Areas of the Alimentary Canal of the 
Amphibia during Development, and the Relation to the Mode of Respira- 
tion. Proc. Amer. Assoc. Adv. Sci., Vol. XXXIX., pp. 337, 338. It is 
shown that while the respiration is mostly aquatic in tadpoles, the oral 
epithelium is non-ciliated, but gradually becomes ciliated as aérial respira- 
tion is acquired. 
GAGE, S. H., and Norris, H. W.—’go. Notes on the Amphibia of Ithaca. 
Proc. Amer. Assoc. Adv. Sci., Vol. XX XIX. (1890), pp. 338, 339- A red 
Diemyctylus was kept through the winter in moist wood humus; in the 
spring it entered the water and soon changed to the viridescent form. 
Gasco, F.—’80, and’81. Les Amours des Axolotles, Zool. Anz., 1V. (1881), 
Pp. 313, 334; Bull. Soc. Zool. Fr. (1881), pp. 151-162. Describes fertiliza- 
tion and ovulation of Axolotles. See also Gli amori del tritone alpestre, 
Geneva, 1880. 
HALLOWELL, Epwarp.—’56. Description of Several Species of Urodeal, 
with Remarks on the Distribution of the Caducibranchiate Division of these 
Animals and their Classification. Proc. Acad. Nat. Sci., Philadelphia, Vol, 
VIII. (1856), pp. 6-11. In a note to page 11 expresses the belief that the 
red form is the same as the viridescent Diemyctylus; the difference in 
appearance being due to the difference in situation, in analogy with the 
change in appearance of the European Tritons when they pass from an 
aquatic to an aerial life. 
HARLAN, R.—’25. Description of the Coluber fulvus Linn., a New Species 
of Scincus and Two New Species of Salamandra. Jour. Acad. Nat. Sci., 
oe Vol. V. (1825), pp. 154-158. See synonymy. 
a tion of a New Species of Salamandra. Jour. Acad. Nat. Sci., 
Philadelphia, ve VI. (1827), p. 101. See synonymy. 
X —'89. Notes on the Habits of Some Amblystomas. AMERICAN 
NATURALI, Vol. XXIII. (1889, pp. 602-612. Gives notes on ovulation, 
food, respiration, etc. See also his paper on the “ Batrachians and Reptiles of 
Indiana” in the forthcoming report of the geological survey of the state. 
HOFFMAN, C. K.—’73-’78. Klassen und Ordnungen der Amphibien. VI. 
Bd., II. Abtheilung, in Dr. H. G. Bronn’s Klassen und Ordnungen des 
Thierreichs. Leipzig und Heidelberg, 1873-1878. Gives anatomy, classifica- 
tion, and mirga Good bibli y 
HOLBROOK, J. E.—’42. North American Herpetology, Vol. V. Philadel- 
phia, 1842. First ie. 1838. Figures and describes Diemyctylus viri- 

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