146 ENGYSTOMATIDiE. 



a-h. S • Sarayacu. Mr. Buckley [C.]. 



c. 2- Oauelos. Mr. Buckley [C.]. 



7. Dendrol)ates labialis. 

 Deudrobates labialis, C'o2)e, 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. 



iN"auta, Upper Amazon. 



The following genus is referred with doubt to this family : — 



S'lrMPFPiA, Boettger, Zool. Anz. 1881, p. 360. 



" Habit of Dendrohates, but without digital disks. Tongue sub- 

 fungiform, divided into two subequal parts by a deep transverse 

 groove ; the front part triojigular, adherent, free on the sides only; 

 the hind part free everywhere, except in front, thick, orbicular, 

 slightly pointed beliind, entire. Xo 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.psolorjhssa, Boettg. 1. c. — Nossi Be, Madagascar. 



3. ENGYSTOMATID^. 



Pbryniscidas, Bracliycephalidfe, part., Rhiuodermatidas, Eugystoma- 



tidrc, part., Bufouidfe, part., Micrlivlidee, Gibith. Cat. Bair. Sal. 

 Rliinophrynidse, part., Engystomidte, Brachymeridse, part., Cojye, 



Kat. lEsf. Pel}. 18G5. 

 Brevicipitida?, Eugystomidaj, Phi-vniscidte, Hemisidce, CojJe, Journ. 



Ac. Philad. (2) vi'. 18G7. 

 PhryniscidfB, Bufouidte, part., Xenorhinidse, Eugystomidee, Mivart, 



Proc. Zool. Soc. 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 lihinoderma and Plirijnhcus 

 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 — Engystoma, Calhda, and others show, 

 in the absence of precoracoids, a structure which is not met with in 

 any other family but that of Diiscophida;. Hemisns and Bveviceps 

 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 vertebrae are procoelian and without ribs ; the coccyx is 



