A M P H I B I A. 



Ordo III. Testudines. 



Animal lesta immobili, cum coslis connata obtectum, tetrapodiim, caudatum, repens vel natans, anl- 

 malculis, herbis vel fructibus victilans , mas pene simplici instructus feminam insidendo fecim- 

 dans, foemina ova numerosa subrotunda mcmbranacea in fossa arenosa ad maris, fluvii vel 

 lacus ripam excavata deponens, non incubans; tympano aurium extus conspicuo; maxillis cor- 

 neis edentatis pyxidum instar se claudentiluis; digitis unguiculalis; ventriculo cordis simplici 

 biauriculato; pulmonibus persistenlibus, metamorphosi, uti in ranis, non subjcclis. 



• 



Genus I. E M Y S. 



Fluviatilis vel lacustris testa convcxo-depressa , ohlonga; pahnis pentadactylis , plantis telra- 

 dactylis, utrisque depressis ; digitis elongatis semipalmatis vel palmaiis, acute 



unguiculatis ; sterno immobilit 



Species I. EIVIYS AI>IAZONICA. Tab. I. adulta. Tab. II. Fig. i. 2. pul- 



lus. F I G. 3. ovum. 



Maxima, magnitudine Chelonis Mydae, brunneo nigricans vel grisea, subtus flavescens ; capite squamoso, 

 depresso, antice compresso, brevi, vix adunco, supra inter oculos approximalos sulcato, posti- 

 ce largissimo ; scutello verticali triangulo postice elongato; gula unicirrhosa; testa ovata, immar- 

 ginata , postice dilatata, planiuscula ; scutello dorsi marginali antico intermedio nullo; bractea 

 pectoris versus caudam blfurcati pentagona, pone acuminata; pedibus scjuamaiis, large palma- 

 tis, squamis latis aliisque linearibus transversis. 



iyESCRiPTio. Caput In emtryonibus flavum , in vertice nigro - blpunctatum , In 

 adullis fusco - flavicans , pyramidale, postice largissimum, membrana colll obvolutum , 

 antlce compressum, breve, acutum, supra inter oculos approximatos sulcatum, squa- 

 mis papyracels quatuor luunitvim, quarum verticalls unica, subhexagonali - ti'igona , 

 oblonga, antice larga, postice angustior; nares membranaceae, rotundae, vlx separatae, 

 subsuperae; maxilla superior et Inferior corneae, obliquae, apice vix aduncae, fla- 

 vescentes, cirrbo in gula unico; collum subcrassum, rugosum, breve, flavescens, oc- 

 ciput Involvens. Testa maxima, magis ovata , convexo - depressa , In medlo adulto- 

 rum dorso planiuscula, antice subangusta, vix einarglnala, vel immarglnato-trun- 

 cata, postice largisslma inargine planlore, In junioribus flavo-vlrescens dorso conve- 

 xlore subangulato, in adullioribus brunneo nigra slve grisea, subtus flavescens dorso 

 planiore; scuta dlscl in junioribus punctulato-rugosa, in adultioribus undulato-stri- 



1 



