EMYS CONCENTRICA. 
nigro punctati. Testa ovalis vel subpentagono-ovata, subconvexa, interrupte carinata, 
margine fere integro, vel postice crenulato, ad latera revoluto, antice rotundato, et 
leviter emarginato. Scuta dorsalia glabra, concentrice sulcata, fusco-viridescentia, 
nigro concentrice zonata: vertebralia obtuse carinata, in junioribus quasi tuberculata ; 
primum pentagonuin ; secundum, tertium et quartum hexagona ; quintum irregula- 
riter hexagonum, interdum subpentagonum, margine posteriore latum, rotundatum : 
costalia plana, declivia, primum quadrilaterale, figurae irregularis, margine superiore 
angustiore, inferiore lato, rotundato ; secundum et tertium pentagono-quadrata, 
angulis inferioribus rectis ; quartum rhomboideum, parvum : marginalia quadrata, 
lateralia subrevoluta : scutum nuchale quadratum, latum. Sternum latum, antice sub- 
truneatum, postice emarginatum, flavescens, scutis singulis lineis et maculis fuscis 
concentrice notatis : scuta jugalia triangularia: humeralia quadrilatera, introrsum 
angustata : 'pectoralia oblonge quadrata, extrorsum profunde sinuata: abdominalia 
reliquis majora, quadrata: femoralia magna, trapezoidea: analia rhomboidea. 
Var. a. scuta dorsalia habet omnino nigra, profunde sulcata, margine toto revoluto; 
et sternum pallide fuscum, plagis subradiantibus. In Var. /3. (Tab. bl) scutum verti¬ 
cale, collum, pedes, cauda atque testa nigri sunt. In Var. y . (Tab. c.) caput, collum, 
pedes et cutis tota, pallide virides, maculis, lineis et punctis nigris notati. In Var. 8. 
testa rufescens, zonis fuscis ; et sternum pallide castaneum. In Var. e, testa unico¬ 
lor est, sordide olivacea, sulcis scutorum obsoletis. 
In junioribus testa oblonge subpentagona, carina vertebrali altiore, abrupte inter¬ 
rupta, et sulcis scutorum profundioribus. In pullis testa supra pallide fusca, sternum 
albidum, nigro minutissime punctatum. 
Scutis dorsalibus amotis, testa ossea colorem flavum exhibet, zonis clare nigris. 
Testee osseee mensura. 
unc. lin. 
Longitudo dorsi. 8 5 
Latitudo. 6 2 
Longitudo sterni. 7 5 
Altitudo . 3 2 
This species appears to have received the name of concentrica from Dr. 
Shaw, in the same year in which Latreille and Daudin applied to it that of 
