34:2 Characters of new Brazilian Reptilia, 



Genus II. CHELYS. 



Capite membranaceo colloque longo depressis, planls, latis 

 fimbrose-appendiculatis ; naso tenui, tubuliformi, proboscideo, 

 elongate ; rostra tenui, minuto ; maxilla inferiore postice cras- 

 siore, elevata ; ore rotundato ; testa depressa, acute carinata, 

 lateraliter acute raarginata ; palmis peutadactyliSj plantis tetra- 

 dactylis, utrisque palraatis, depressis. 



Species 12. C. Matamata. 



Mediocris, aspectu horribilis, fusco-rufa ; capite supra et infra 

 tympanum membrana fimbriate large alato ; maxilla inferiore 

 infra superiorem prominente, non serrata ; gulS, colloque appen- 

 dicibus membranosis fimbriatis verrucisque obsitis ; testa ovatS,^ 

 supra dorsum acute tricarinata ; scutis concentrice granulatis ; 

 pedibus squamosis, squamis solitariis crassis, seriatim positis. 



Habitat ad urbem Parae in aquis stagnantibus fluminis Ama- 

 zonarum. 



Genus III. KINOSTERNON. 



Structura Emydis, pectpre modo cataphracto ; maxillis et capite 

 supra inter oculos nudo squamosis ; rostro pernasuto ; ociilis 

 minus approximatis ; giila subtus multicirrhosa; cauda apic^ 

 unguiculata ; bracteis pectoris undecira, illis pectus inter et testan^ 

 interjacentibus non connatis; pulpebris transversis. 



Species 13. K. longicaudatum. 



Supra rufo-nigricanSj subtus nigro-rufum ; testa oblonga, in 

 medio dorsi subtricarinata ; scutis striate sulcatis; cauda elon- 

 gate, crassa. 



Habitat in campis aquosis, ab incolis Mucua dicta. 



Species 14, K. brevicaudatum. 



Nigro-fuscum, prascedente minus, ovato-subglobosum ; cauda 

 brevissimA, breviter unguiculata ; scutis dorsi non striatis, mar- 

 ginali imparl vix conspicuo, pectoris rdlundato, largo 3 pectore 

 subconvexo, apice vix furcato. 



Habitat ad ripam fluminis Solimoens. 



