4 U. S. NATIONAL MUSEUM BULLETIN 206 



Variations. — In USNM 101726, from the same place as the described 

 specunen, the skin is smooth, only a trace of the flat dorsal tubercles 

 being visible on the snout. The light spot below the eye is reduced 

 to a minute crescent, and the entire throat and anterior chest are 

 deep clove brown like the back, while the axilla and lower surface of 

 the upper arm are white and emerge from the surrounding dark color 

 like light sleeves from a dark vest. There is also in this specimen a 

 light stripe along the posterior surface of the upper arm that ends in a 

 rather distinct light spot at the axilla; in other features it agrees 

 with the one described. In the original description the maximum of 

 25 mm. is given. AMNH 33895, 20081, and 20084-5 measure 24, 24, 

 23, and 24 mm. in length. The three last have exceedingly rough 

 skin on the backs and a wide light dorsolateral stripe quite well 

 marked posteriorly. 



Remarks. — As Miranda-Rib eiro remarked in his original descrip- 

 tion, this species is very distinct from A. stelzneri, of which a good 

 series from Uruguay and the Argentine is now at hand. Wliile the 

 color pattern is suggestively similar in the tv/o forms, stelzneri has a 

 shorter foot and a very much more spiny skin on the tarsus and foot. 

 Its snout is also much less truncate, seen from above, and the ventral 

 skin is covered with minute spines that become more prominent 

 posteriorly and laterally. Its metatarsal tubercles are both well 

 developed, while neither is developed in moreirae, although this feature 

 may be to some extent a result of preservation. The nearest relative 

 of moreirae seems to be the ParA form collected by Massart, which I 

 have named A. moreirae massarti (Bull. Mus. Hist. Nat, Belgique, 

 vol. 24, No. 24, p. 1, figs. 1, 2, July 1928). 



Specimens examined 



BRAZIL: Interior of: BM 74.7.16.1-4, Jun. 



Rio de Janeiro: Itatiaia, USNM 101725-6, Miranda-Ribeiro; AMNH 33895, 

 A. Lutz; AMNH 20081, 20084-5, Miranda-Ribeiro; BM 1923.11.8.1, Mi- 

 randa-Ribeiro. 



Genus Brachycephalus Fitzinger 



1826. Brachycephalus Fitzinger, pp. 39, 65. (Genotype, Bufo ephippium Spix.) 



Generic diagnosis.- — Pupil horizontal. Tongue elliptical, entu'e, free 

 behind. Palate smooth. No tympanum. Fingers and toes free. 

 Outer metatarsals united. A broad dorsal bony shield, confluent 

 with the processes of the second to seventh vertebrae. Coracoids 

 and precoracoids slightly divergent; no omosternum; sternum carti- 

 laginous. Diapophyses of sacral vertebra feebly dilated. Terminal 

 phalanges simple. 



