146 ENGYSTOMATID &. 
a-b. 3. Sarayacu. Mr. Buckley [C.. 
Coys Canelos. Mr, Buckley [C.}. 
7. Dendrobates labialis. 
Dendrobates labialis, Cope, Proc. Ac. Philad. 1874, p. 129. 
Snout flat, moderately elongate, and broadly truncate, as long as 
the diameter of the eye; tympanum one fifth the size of the eye. - 
First finger longer than second. Skin minutely areolate on the 
upper surfaces. Upper lip pale-banded, the band extending through 
the axilla and meeting its fellow at the pubis. 
Nauta, Upper Amazon. 
The following genus is referred with doubt to this family :— 
Srumprri1a, Boettger, Zool. Anz. 1881, p. 360. 
“ Habit of Dendrobates, but without digital disks. Tongue sub- 
fungiform, divided into two subequal parts by a deep transverse 
eroove ; the front part triangular, adherent, free on the sides only ; 
the hind part free everywhere, except in front, thick, orbicular, 
slightly pointed behind, entire. No maxillary nor palatine teeth. 
Tympanum, eustachian tubes, and parotoids not visible. Fingers 
free, the tips truncate ; the tips of the third finger and of the median 
toe slightly dilated. No metatarsal tubercles or spur.” 
S. psologlossa, Boettg. 1. c.—Nossi Be, Madagascar. 
3. ENGYSTOMATIDA. 
Phryniscidee, Brachycephalide, part., Rhinodermatide, Engystoma- 
tide, part., Bufonidee, part., Micrhylide, Giinth. Cat. Batr. Sal. 
Rhivophrynide, part., Kngystomide, Brachymeride, part., Cope, 
Nat. Hist, Rev. 1865. 
Brevicipitidee, Engystomide, Phryniscidee, Hemisidee, Cope, Jowrn. 
Ac. Philad. (2) vi. 1867. 
Phryniscidee, Bufonidee, part., Xenorhinide, Engystomide, Mivart, 
Proc. Zool, Soe, 1869. 
Maxillary teeth none; diapophyses of sacral vertebra dilated. 
The members of this family exhibit great differences in the struc- 
ture of the sternal apparatus. Whilst Rhinoderma and Phryniscus 
approach the preceding families—the former genus being provided 
with a cartilaginous omosternum, a part totally absent in all other 
genera of the present family—Kngystoma, Callula, and others show, 
in the absence of precoracoids, a structure which is not met with in 
any other family but that of Dyscophide. Hemisus and Breviceps 
are also remarkable forms, the proportions in the latter and the 
position in the former of the bones of the sternal apparatus being 
unlike what obtains in any other Frog. 
The vertebre are proccelian and without ribs; the coceyx is 
