NATURAL SCIENCES OP PHILADELPHIA. 353 



narrower and shorter, and the gape of the mouth less ; the aspect is more 

 that of Eugystoina. The expedition specimen lias the lumbar gland black. 

 It is probably 0113 of Giinther's varieties of bibronii. No. 5840. 



Cystignathus fuscus Gthr. Var. No. 5842. (Braz.) 



Cystignathus podicipinus Cope, Pr. A. N. S. Philada., 1862, p. 156. 



Phryniscus nigricans Wiegm., Dum. Bibr., viii. 723. No. 5834, et var. 

 with very large (?) white spots on the sides, belly, and labial regions. No. 

 5833. 



Phrynoidis agua Cope, Daud., Dum. Bibr., viii. 703. (Braz.) 



Bufo diptychus Cope. 



Cranium without longitudinal ridges. Canthus rostralis concave rounded; 

 muzzle elevated, not protruding. Orbit as wide as length of muzzle anterior 

 to it. Tympanum small, scarcely perceptible. Tongue elongate, subcyliudrical. 

 Internal finger slightly longer than second, shorter than third ; toes one-third 

 palmate, third longer than fifth. A tarsal cutaneous fold continuous with the 

 inner metatarsal tubercle ; outer tubercle subcorneal. Paratoids beginning 

 behind upper margin of tympanum, divergent, trilateral, extending posterior 

 to the axilla, and continuous with a lateral dermal fold. Skin above smooth, 

 with a few scattered tubercles. Femora, sides and abdomen rugulose ; the 

 first partly bound by the integument of the sides. The extended limbs reach, 

 the anterior to the femur, the posterior to the end of the muzzle. Muzzle to 

 vent one inch. Above light brown, with a whitish vertebral line ; there are 

 four deep brown spots on each side of this, and a broad chevron-shaped band 

 of the same from border to border of the upper eyelids. A brown band on 

 canthus rostralis, and two from orbit to lip. One from orbit to shoulder on 

 outer edge of paratoid, continuous with a blackish shade beneath the lateral 

 fold. Abdomen brownish white, with a median series of blackish variations 

 from sternum to abdomen. No. 5841. 



This species bears some resemblance to Phrynoidis variabilis of Dr. Gun- 

 ther, a species furnished with cranial ridges and a distinct tympanum. It differs 

 from B. poeppigii Tsch., as described by Girard, in the form of the muzzle, 

 and condition of skin, and coloration. The paratoids are larger than in B. 

 t h a u 1 Lesson (fide Girard) and B. chilensis; the skin is much smoother, 

 and the coloration different. InB. pantherinus (maculatus Hallow., Pr. 

 A. N. S., 1S54, p. 101) and guineensis, the paratoids are elongate oval. 



Hypsiboas raniceps Cope. 



Vomerine teeth in two oblique curves, whose inner limb is very short, the 

 structure prevailing in Hypsiboas. External digits one-third webbed. Only 

 two phalanges of the fourth toe free. Appressed femur extending five-sixths 

 the distance to the axilla; no calcaneal appendage. Fingers reaching femur. 

 Head longer than broad, subacuminate ; loreal region oblique, not grooved ; 

 canthus rostralis slightly curved, rounded. Tympanum more than half the 

 size of the eye. Tongue oval, entire. Skin everywhere smooth, except upon 

 the usual regions abdominal, thoracic, and inferior femoral. A subgular 

 vocal sac, with very large oval openings. Expanse of rami of mandible 9 

 lines ; muzzle to arms 2 inches 9 lines ; anterior extremity 1 inch 6 lines ; 

 posterior extremity 4 inches 5 lines. Ashy, reddish, or dark brown above, 

 with darker cross-bands or broken marblings, which are most distinct poste- 

 riorly. A dark brown band from end of muzzle through eye to posterior 

 margin of tympanum. Brachium, whole length of sides, and all the surfaces 

 of the posterior extremity, except postero-internal of femur and external of 

 tarsus, vertically or transversely brown banded. A whitish band on outer 

 face of the antcbrachium, and of tarsus and foot. Subanal region paleish. 

 Abdomen immaculate ; thorax and gular region shaded and spotted with 



1862.] 24 



