Cope.] -LOb [July 16, 



frenum across the palate beliind. The vomer is cartilaginous between 

 the uares, except on axis. Gape large, the muzzle projecting slightlj^ be- 

 yond it. No canthus rostralis, nostrils latero-superior. Limbs short, 

 humerus and femur included in the skin. Toes very unequal, the inner 

 and outer very short; related thus, 1-2-5-3-4. An obtuse tubercle at the 

 base of the outer toe. The epidermis is everywhere thickened by a 

 chitin-like deposit, which is readily cracked. It is thickest on the soles, 

 the tarsi, and the gular region. 



Color everywhere leather-brown ; a narrow white line from end of muz- 

 zle to vent. 



MJI. 



Length of head and body 057 



" " hind limb from knee 0495 



' ' " tarsus 009 



" " remainder of foot 0245 



" " fore limb from elbow OiOO 



Width between angles mandible 020 



" " orbits C09 



" " nostrils 004 



Found near Sao Matheos, south of Rio de Janeiro, by Messrs. Hartt 

 and Copeland, of the Thayer Expedition to Brazil, Mas. Comparative 

 Zoology, Cambridge, Mass., No. 855. 



This is a remarkable type, with a certain resemblance to Engystoma. 

 It is the first type among the Raniformia which betrays even a remote 

 resemblance to Pipa. 



Hypopachus ikguinalis, Co2)e, sp. nov. 



This species is of about the same size as the H. variolosus Cope, 

 and like it has the toes partially webbed at the base. It differs by many 

 marked characters throughout. 



Muzzle rounded conic, projecting beyond lip ; nostrils superolateral. 

 Width of head behind orbits, double length to opposite the same point. 

 A groove from orbit to humerus. Diameter of former equal length of 

 muzzle from the same. Mandible with symphyseal knob little marked ; 

 gular slits large ; tongue flat, ovate, largely free and thin behind, Avith- 

 out free border in front. Nares large, double the small ostia pharyngea. 

 Two metacarpal tubercles ch)se -together ; fingers slender, with subartic- 

 ular knobs. The metatarsal tubercles with cutting edges in nearly the 

 same line without blackening of the sheath, the inner the longer. No 

 tarsal fold. Skin everywhere smooth, except some minute pappillae on 

 the sacro-coccygeal region. 



Coloration. Above a pinkish leaden, w'ith a more or less indistinct nar- 

 row vei'tebral line from the end of the muzzle. A large and a small black 

 spot on the groin and one on the knee. A large black spot on the 

 scapula ; a pair of blackish lines which converge from the orbits to the 

 inter-scapular region, then diverge and form an imperfect circle on the 

 middle of the back. Sides of head blackish ; a yellow bar from orbit to 

 humerus. A black bar across closed femur and tibia above. The femur 



