8. HTPOPACHFS. 159 



sclerotica ossified, so as to form a hard annulus round the cornea. 

 Tympanum concealed. Fingers and toes free. Prccoracoids pre- 

 sent ; no omosteruum ; sternum cartilaginous, much dilated, and 

 entirely in contact with the coracoids. 

 Brazil. 



1. Stereocyclops incrassatus. 



Stereocyclops incrassatus, Cope, I. c. 



Physiognomy approaching P/pa. Gape large, the muzzle pro- 

 jecting slightly beyond it. Limbs short, humerus and femur in- 

 cluded in the skin. Toes very unequal, the inner and outer very 

 short. An obtuse tubercle at the base of the outer toe. Epidermis 

 everywhere thickened by a chitin-like deposit. Colour everywhere 

 leather-brown ; a narrow white Knc from end of muzzle to vent. 



Sao Matheos, south of llio Janeiro. 



8. HYPOPACHUS* 



Hypopachiis, Kef erst. Gottiny. Xachr. 1867, p. 352. 

 Engystonia, sp., Coi.c, Pi-oc. Ac. Fhilacl. 1866, p. 131. 

 Sjstoma, sp., Cope, Journ. Ac. Philad. (2) vi. 1867, p. 194. 



Pupil erect. Tongue elliptic, entire, free behind. Vomerine 

 teeth none. A dermal ridge across the palate between the choanee, 

 and another in front of the ccsophagus. Tympanum hidden. 

 Fingers free ; toes with a rudiment of web, the tips not dilated. 

 Outer metatarsals united. Precoracoids present, very weak; no 

 omosteruum ; sternum cartilaginous. Diapophyses of sacral ver- 

 tebra moderately dilated. Terminal phalanges simple. 



Tropical America. 



1. Hypopachus variolosus. 



Engystoma variolosum, Cope, Proc. Ac. Philad. 1866, p. 131, and 



Proc, Amcr. Philos. Soc. 1869, p. 166; Brocchi, Bull. 8oc. Pkilom. 



(7) i. p. 192. 

 Hvpopachus seebachii, Kef erst. Gotting. I. c, and Arch.f. Natuvg. 



'18(;8, p. 293, pi. 9. f. 1 &■ 2. 

 Systoma variolosum, Cope, Joarii. Ac, Philad. (2) vi. 1867, p. 194. _ 

 Hvpopachus variolosus, Cope, Journ. Ac. Philad. (2) viii. part ii. 



p. 101 ; Brocchi, Miss. Sc. Mex., Batr. pi. 10. f. 2. 



Bnout short, siibacuminate, moderately prominent, once and a 

 half the diameter of the eye. Fore limb much longer than its 

 distance from the tip of the snout ; fingers moderately elongate. 

 Hind limb stout ; it being carried forwards along the body, the 

 tibio-tarsal articulation reaches the shoulder, or nearly as far ; toes 



* Copcafulva, Steindachn. Verb, zool.-bot. Ges. Wien, 18G4, p. 286, pi. xvii. 

 f. 5, belongs perhaps to this geuus. Hub, Brazil. 



