MEXICAN TAILLESS AMPHIBIANS 59 



to evaporate at some time when they were in the possession of 

 Professor Cope. 



Professor Werner received the type specimen (N.M.W., Werner 

 Coll. No. 115, 1929) of Bujo lateralis from T. K. Salmon, who made 

 collections on the Isthmus of Tehuantepec in 1872. The following 

 notes were made on the type: Head-and-body length, 59 mm.; the 

 hind limb being carried forward along the body, the tibio-tarsal 

 joint does not reach to the level of the parotoid gland, and is at least 

 7 mm. from the posterior margin of the tympanum; the parotoid 

 glands are placed diagonally on the shoulders, the greatest diameter 

 of the right one being 6.4 mm. and that of the left one 6.8; cranial 

 crests low; a short supratympanic crest; transverse diameter of tym- 

 panum, 3.3 mm.; transverse diameter of eye, 7.5 mm.; transverse 

 diameter of head at level of angle of jaws, 21 mm.; subarticular 

 tubercles on fourth toe double; soles of fore and hind feet with numer- 

 ous supernumerary tubercles; inner metatarsal tubercle small, but 

 larger than outer; a row of minute warts along tarsal fold; throat, 

 abdomen, and under surfaces of thighs granular; warts on upperparts 

 low and flattened ; a white dorso-lateral longitudinal stripe above linear 

 series of low warts; a lateral brown band extends from angle of paro- 

 toid to thigh; coloration of upperparts much faded; a light vertebral 

 stripe, on each side of which is an anterior and a posterior dark blotch; 

 under surfaces of fore and hind feet black. 



The species Bnfo marmoreus seems to be somewhat closely related 

 to B. canaliferus, a species that has a somewhat similar coloration, 

 but is distinguished at once by its elongated parotoid glands. 



The habits and life history of Bnfo marmoreus are unknown. 

 Collectors in the past have paid little attention to the ecological 

 preferences of Mexican toads. A large lot received from Xantus 

 would seem to indicate that they congregate in pools in considerable 

 numbers during the breeding season and that their breeding habits 

 are not unlike those of other toads. Their main center of abundance 

 seems to lie west of the Sierra Madre del Sur. 



Toads belonging to this species have the following characteristics: 

 Ground color of upperparts brownish gray, marbled more or less 

 distinctly with some darker color; a whitish vertebral line of varying 

 width, on each side of which are three large or a greater number of small 

 irregular light margined dark blotches; the whitish markings above 

 and the brown markings below the lateral row of small warts form 

 more or less confluent longitudinal bands of varying width; a contin- 

 uous or medially interrupted V-shaped band crosses the upper eyelids 

 and interorbital region ; fore and hind limbs above with dark cross- 

 bars; underparts immaculate; cranial crests low, the most conspicu- 

 ous of which are the combined supraciliary and postorbital crests 

 which form a continuous curve from the anterior margin of orbit to 



