FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 245 



base of penultimate phalanx of fourth, mner and outer metatarsal 

 tubercles small but distinct, about equally developed ; a wide dermal 

 fold along inside of tarsus. Body stout, in postaxillary region equal 

 to greatest width of head; when hind leg is adpressed, heel reaches to 

 nostril; when limbs are laid along the sides, knee and elbow overlap; 

 when hind legs are bent at right angles to body, heels just touch. 

 Skin of upper parts minutely glandular, with low tubercles on pos- 

 terior sacral region and on upper tibia; a narrow supra tympanic ridge 

 extending to shoulder, and a heavy gland at posterior corner of mouth ; 

 ventral surface quite smooth; throat with a median fold indicating 

 the presence of an external vocal sac. A furrow in the skin across 

 chest between the axillae. Forearm moderately well developed. 



Dimensions.— B.ea,d and body 31 mm.; head length 10.5 mm., 

 width 10 mm.; femur 12.5 mm.; tibia 14 mm.; foot 14 mm.; hand 

 8 mm. 



Color in alcohol.— Dorsum wood brown lightening to fawn pos- 

 teriorly and on upper limb surfaces; a darker brown stripe on the side 

 separates the dorsal color abruptly from the white underparts; femur 

 with three diagonal wide brown bars separated by light areas, these 

 continued onto tibia and foot, but fainter. Upper hp white, with a 

 coarse dark brown reticulation. A white line from corner of mouth 

 and shoulder, with a dark brown spot below it on side of throat. 

 Venter white to pale buff, the throat with a median short dark longi- 

 tudinal line. 



Remarks. — Detailed studies of the Hfe history of Crossodactylus 

 from many localities may bring to light differences more significant 

 than the very shght structural ones which may be made out by an 

 examination of preserved material, "While the snouts of many speci- 

 mens of C. gaudichavdii appear angular in outline, many are bluntly 

 rounded Hke a majority of those of C. aeneus. The interorbital 

 diameter in gaudichaudii is usually greater than the width of the 

 upper eyelid, but nearly as often equals the eyelid; in aeneus it usually 

 equals the eyelid but is occasionally narrower, so that on this point 

 only a few specimens from either locality show a positive difference. 

 In about one-fifth of the examples of aeneus, the nostril is one-half 

 the distance from eye to tip of snout; in the remaining examples the 

 nostril is from two-thirds to four-fifths of the distance. In gaudi- 

 chaudii, a little less than half the specimens have the nostril midway 

 between eye and tip of snout, while the greater part have it from 

 two-thirds to three-fourths that distance. The pattern, however, 

 does show a more constant difference, as in aeneus it is confined usually 

 to the head, while most gaudichaudii show some additional markings 

 on the back. The dorsolateral fold is distinct, slight, or absent in 

 a€7ieWas in gaudichaudii, and, in this instance, method of preservation 



