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80 UNIVERSITY OF KANSAS PUBLS., MUS. NAT. HIST. Distribution in Sinaloa.—Bufo kelloggi occurs throughout the coastal lowlands below 200 meters. See Fig. 19. Specimens examined.—18 km. NW Acaponeta (Nayarit) (*KU 60472); 4.7 mi. NE Concordia (CSCLB 1734-35); 20 mi. N. Culiacan (LACM 6077- 82); 32 km. N Culiacan (°KU 73777-87); 12 mi. N {on hwy. 15) Rio Elota (LACM 6071-76); 15.4 mi. N Jon hwy. 15) Rio Elota (LACM 6052); 32.5 mi, SE Guamuchil (CSCLB 1737}; Isla Palmito de la Virgen, 5 m. (°KU 73776); 1-3 mi. E La Cruz (LACM 6065-70); 5 mi. E La Cruz (LACM 6053-64); 39 km. N Los Moehis (*KU 60473-79); 18.4 mi. NW Los Mochis turnoff (on hwy, 15) (UAZ 11487); 20.7 mi. NW Los Mochis tumoff (on hwy. 15) (UAZ 11493-94); Mazadan (CSCLB 1736); 3 mi. N Mazadan (UAZ 11490); 5 mi. N Mazadan (CSCLB 1733); 5.4 mi. SE Mazadan (UAZ 11489); 2.5 mi. NW Mazadan (UAZ 11488, 11491-92, 13796-80); Villa Union (*KU 75205-24); 3.7 km. E Villa Uni6n, 30 m. (*KU 78267). Literature records.—13-35 m. N Culiacan; 33 mi. SE Escuinapa (Bogert, 1962:34); 4-33 mi. SE Escuinapa, 50 ft. (Davis and Dixon, 1957b: 145); 13 mi. N Los Mochis (Bogert, 1962:34); 24 mi. N Los Mochis (Davis and Dixon, 1957b:145); 13 mi. NE Los Mochis (Smith and Chraphwy, 1958:267); Mazadan (Kellogg, 1932:53; Taylor, 1938:510); 2 mi. N Mazadan; 6 mi. S Mazadan; 6 mi. SW San Bias (Bogert, 1962:34). Additional records.—Copala (CAS 89758-59); 2.4 mi. N. Escuinapa (CAS 99600); 0.9 mi. E La Cruz (CAS 99646); Mazadan (FMNH 100717-18; UIMNH 39729); 27.9 mi. N Mazadan (UF 12859); 36 mi. N Mazadan (UIMNH 39475); 2 mi. E Mazadan (UIMNH 23450-59; USNM 134258); 15.6 mi, NNW Mazadan, 200 ft. (UMMZ 115347 [2 spec.]). Bufo marinus (Linnaeus) Rana marina Linnaeus, Sistema naturae, ed. 10, 1:211, 1758 (based on a specimen from America). Bufo marinus: Schneider, Historias amphibia rum naturalis et literariae, 1:219,1799. Remarks.—Bufo marinus is common throughout the lowlands of Sinaloa. Taylor (1938:508) found one specimen under a board on the sandy beach of the Rio Mazatlan near Presidio. In the dry season individuals congregate along streams and irrigation ditches. Bogert and Oliver (1945:340) found hibernating toads under boulders along the river [Rio Culiacan?] at Culiacan. Large numbers of juvenile toads (snout-vent length approximately 20) were observed on the rocky shore of the Rio Fuerte in June, up to 150 meters from the water. Small young are easily identified by the presence of a white spot on the upper jaw just below the eye, an enlarged triangular parotoid gland, the presence of a row of warts (sometimes connected) extending from the posterior tip of the parotoid gland along the side of the body, and the presence of a prominent tarsal fold. The white spot is absent in some toads measuring more than 100 mm. in snout-vent length, but the parotoid gland and lateral row of warts usually are more distinct in larger toads. These large ubiquitous toads were observed several times in towns and villages
AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 81 sitting beneath street lights or in patios of cafes and houses, eating the myriad of insects attracted to the lights. Males were heard calling along the Rio Piaxtla at La Cruz on July 1 after a heavy rain had flooded the river. On August 16, several hundred individuals were found dead on the road about 28 miles north Mazatlan. Evidently a large flooded field to the east of the road had served as a breeding pond. Distribution in Sinaloa.—Bufo marinus occurs throughout the lowlands of Sinaloa up to elevations of about 500 meters. See Fig. 20. Specimens examined.—Aguaje (UCLA 14833); nr. Concepci6n (LAGM 6097); Concordia (* KU 78278; UNM 9981-97); 4.5 mi. NE Concordia
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