Bishop, S. C.
1947. Handbook of salamanders. Ithaca, Comstock. xiv + 555 pp.
Gordon, R. E.
1952. A contribution to the life history and ecology of the plethodontid
salamander _Aneides aeneus_ (Cope and Packard). Amer. Midl. Nat.,
47:666-701.
Lack, D.
1954. The natural regulation of animal numbers. Oxford, Clarendon,
viii + 343 pp.
Lowe, C. H., Jr.
1950. The systematic status of the salamander _Plethodon hardii_, with
a discussion of biogeographic problems in _Aneides_. Copeia,
1950(2):92-99.
Stebbins, R. C.
1951. Amphibians of western North America. Berkeley, Univ. Calif,
xviii + 539 pp.
Szymanski, J. S.
1914. Eine Methode zur Untersuchung der Ruhe- und Aktivitaetsperioden
bei Tieren. Arch. ges. Physiol., 158:343-385.
Taylor, E. H.
1941. A new plethodont salamander from New Mexico. Proc. Biol. Soc.
Wash., 54:77-79.
_Transmitted May 11, 1959._
27-9040
Transcriber's Notes:
Changed "vestigal" to "vestigial" on page 578: vestigal-winged flies.
Changed "inmature" to "immature" in Table 2: nematodes that were inmature.
Changed "auomatically" to "automatically" on page 582: not auomatically
invalid.
Changed "Syzmanski" to "Szymanski" in Literature Cited on page 585.