8. HYPOPAcnus, 159 



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

 Tympanum concealed. Fingers and toes free. Precoracoids pre- 

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

 entirely in contact with the coracoids. 

 Brazil, 



1. Stereocyclops incrassatus. 



Stereocyclops incrassatus, Cojye, I. c. 



Physiognomy approaching Pipa. Gape largo, 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 hy a chitin-liko deposit. Colour everywhere 

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



Sao Matheos, south of Eio Janeiro. 



S. HYPOPACHUS*. 



Ilypopaclius, Keferst. Goitin;/. Kcic/ir. 1867, p. 352. 

 Engystoma, sp., Cope, Proc. Ac. Philad. 1866, p. 131. 

 Systoma, sp., C'o^je, Journ. Ac. Philad. (2) vi. 1867, p. 194. 



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

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

 and another in front of the oesophagus. 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 



I'roc. Amcr. Philos. Soc. 18G9, p. 1C6; Brocchi, Bull. Soc. Philom. 



(7) i. p. 102. 

 Hypopachus seebachii, Keferst. Gottimj. I. c, and Arch. f. Natunj. 



Iti(j8, p. 293, pi. 9. f. 1 &■ 2. 

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

 Ilvpopachus variolosus, Copie, Jottrn. Ac. Philad. (2) viii. part ii, 



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



Snout short, subacuminate, 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 



* Copca fuh'ci, Steindachn. Verb, zool.-bot. Gcs. 'Wien, 18G4, p, 280, pi. xrii. 

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



