as unknown on the west side
of the Isthmus until I found it in great numbers near the mouth of the
Balsas River, in and near fresh-water pools, where it attracted
attention by its loud peculiar voice during the pairing season in the
month of July." Subsequently, Peters (1954:3) verified the
identification of these specimens. Although torrential rains fell during
the week in July, 1955, that I spent at Playa Azul near the mouth of the
Rio Balsas, the distinctive voice of _Rhinophrynus_ was not heard.
Elsewhere on the Pacific coast of Mexico adult _Rhinophrynus_ have been
reported only from Tehuantepec and a few localities on the coastal
lowlands of Chiapas. Taylor (1942b:37) found on the coast of Guerrero a
tadpole that was referred to the genus _Rhinophrynus_ by Orton (1943).
In the summer of 1960 adults of _Rhinophrynus_ were collected near
Acapulco, Guerrero (Fouquette, _in litt._). These recent collections
verify the existence of the species along the Pacific lowlands of Mexico
at least as far north as Michoacan.

~Scaphiopus hammondi multiplicatus~ Cope

_Scaphiopus multiplicatus_ Cope, Proc. Acad. Nat. Sci.
Philadelphia, 15:52, June 8, 1863.--Valley of Mexico.

_Scaphiopus hammondi multiplicatus_, Kellogg, Bull. U. S.
Natl. Mus., 160:22, March 31, 1932.

Angahuan (5); Cuitzeo (4); Cuseno Station (2); Jiquilpan
(9); Morelia (7); Patzcuaro (3); Quiroga; Tarecuaro; Uruapan
(24); Zacapu.

This small toad has been found at elevations between 1500 and 2500
meters on the Mexican Plateau and associated mountain ranges; it occurs
in mesquite-grassland and in pine forests. Calling males and females
laden with eggs have been collected in the rainy season in the months of
July and August. The call is a medium-pitched snore. In living
individuals the dorsal ground color varies from pale brown to gray with
dark brown or olive-brown markings. In many individuals the tips of the
small dorsal pustules are red.

~Bufo coccifer~ Cope

_Bufo coccifer_ Cope, Proc. Acad. Nat. Sci. Philadelphia,
18:130, 1866--Arriba, Costa Rica.

Apatzingan (27); Lombardia; Nueva Italia (5).

In life the dorsal color pattern consists of a yellowish tan ground
color with dark brown spots; the middorsal stripe is deep yellow or
cream color. The venter is a dusty cream color, and the iris is pale
gold. Males have dark brown horny nuptial tuberosities on the thumb. The
following measurements a