i5 



Genus II. C H E L Y S. 



Capite membranaceo colloque longo depressis, planis, latis, Jimhriose appendiculatis ; 



naso tenui, tuhuliformi, proboscideo, elongato ; rostro tcnui, minuto; maxilla inferiore 



postice crassiore, elevata;' ore rotundato ; testa depressa, acute carinata, lateraliler 



acute marginata ; palmis pentadactylis, plantis tetradactylis, utrisque 



palmatis , deprcssis. 



Species 12. CHELYS MATAMATA. tab. xi. 



INIedlocris, aspeclu horribilis, fiisco-rufa; capite supra et infra tympanum memhrana fimhrlata large 

 alato *, maxilla inferiore infra superiorem prominente, non serrata; gula colloque appendici- 

 bus membranosis fimbrialis verrucisque obsitis; testa ovata, supra dorsum acuie tricarinala ; 

 sculis concenlrice granulalis; pedibus squamosis, squamis solitariis crassis, serialim posllis. 



J_y ESCRip Ti o. Caput plaiiuin, larguin , rufo-fuscum, iion squamosum, supra 

 et iiifra tympauum triangulum, appeudice membi"aiioso , subtus miniaceo alatum ,* ro- 

 strum miiiutum, in nares tubuliformes , tenues, proboscideas prolongalum ; oculi par- 

 vi; os rotundum , poslice valvuloso - tuberosum ; maxilla inferior aalice infra supe- 

 riorem prominens, aec£ue non serrata, subtus utrinque fimbriata , poslice, uli in Bu- 

 fone nasuto, crassa, angulato - elevata , bifimbriata; collum crassum, planum , longum, 

 fusco-rufum, nigro-trilineatum , subtus obscure miniaceum, sex lineis nigris lon- 

 gitudinalibus striatum, verrucis, et ad latera appendicibus membranaceis in se- 

 rie duplicata positis. Testa rufo-fusca, subconvexa, ovata, antice largior, immargi- 

 nato - subtruncata , postice angustior , subacuta , in medio dorso depressa , planiuscula, 

 acute tricarinata ac bisulcata, carinis postice approximatis, ad marginem lateralem me- 

 dium compressa , verticalitcr descendens , antice et postice obliqua , scuto singvilo 

 eibboso-angulato; scuta papyracea, postice acuta, tuberosa, radiis granulosis concen- 

 Iricis, spinalia cjuincjue, acute carinata , quorum anticum primum largum, pentago- 

 nuni, antice largiusculuni , apice medio acuminatum, secundum et tertium subrectan- 

 pula, quartum subbexangulum, sublongum, poslice gibbum, quintum beptanguluin, 

 antice tenuius , postice acutum , niedio acute elevatum; scuta lateralia quatuor, su- 

 pra eibbosa, cataphracta , inlrorsum sulcata, (juorum anlerius trapezoideum, intus tenui- 

 us, extus angulato-rotundatum, secundum subrectangulum , intus subtenue, terlium 



