100 



ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



membranum tympani is distinct in its anterior half, and the ostia-pharyngea are 

 minute. 



Length of head and body . 

 Width of head behind 

 Length to orbit . 



" to posterior border skull 



" to axilla 



" to groin 



" of fore limb . 



" of fore foot 



" of hind limb . 



" of hind foot . 



M. 

 .031 



.010 



.004 



.010 



.015 



.026 



.023 



.010 



.038 



.021 



Color brown ; a quadrate patch on vertex from orbits to occiput, an oblique 

 band from the latter outwards on each side, and a spot on each lateral sacral region 

 black. Belly marbled with black ; throat and limbs below, dusky. 



This species resembles in its general appearance the Crepidius epioticus, Cope, 

 but differs in many points, both generic and specific. It is also allied to the Bufo . 

 veraguensis, Schmidt, but according to that author the supra-tympanic crest is 

 much smaller than in B. auritus. 



Two specimens from the East coast region. 



8. Bufo valliceps, Wiegm. B. nebulifer, Girard, TJ. S. Mex. Boundary Survey, 11.(2) 25, PI. 

 XL. f. 1. 

 A variety with narrow cranial crests, and less fully webbed toes ; the ground 

 color is light, and is marked with large black spots forming a row on each side of 

 the median line. Throat and breast black, pale spotted. 



Bufo coccifer, Cope. Proceed. Acad. Philada., 1866, p. 130. 



Parotoids round semi-globular. Muzzle narrowly rounded, nearly as long as 

 orbit. Strong bony, canthal, pre-, sub-, and postorbital, supratympanic and supra- 

 orbital ridges; the last regularly curved and sending a parietal branch towards the 

 median line ; the first rapidly converging, leaving only a gutter between. Tym- 

 panum one-fifth orbit. Everywhere minutely tubercular, those of the sides and 

 forearm conic; soles rough, web short, metatarsal tubercles small, obtusely promi- 

 nent ; tarsal fold scarcely visible. Heel to axilla. Two obtuse metacarpal warts. 



Gray brown ; a yellow vertebral line, with numerous chestnut brown light 

 bordered spots on each side. Sides with two longitudinal brown bands ; one from 



