TORTOISES. 23 



a. Animal and shell, adult, 6 inches. Tropical America. 



b. Shell only, adult, 12 inches. T. America. Presented hy J. 



E. Gray, Esq. 



c. Young, dry, 1| inch. T. America. 



d and e. Young, hi spirits, 2 inches. Mazet Land, Gray. Beechey, 



Voy. t. Presented by Alexander Collie, Esq., R.N. 



The Oregon Emys. Emys Originensis. Harlan, Amer. 

 Jour. Set. xxxi. 382, I. 31. Holbrook, Amer. Herpet. ii. t. 1. 



Shell suboval, greatly depressed, serrated in front, slightly 

 nicked behind, dusky brown, with a narrow yellow forked line ; 

 anterior vertebral irregular, four-sided, marginal plates each with 

 two half oblong spots ; sternum broad, oblong, serrated anteriorly, 

 emarginate posteriorly, yellow, with a black blotch extending to 

 all the plates ; head small, elongate; upper jaw bidentate. 



N. America. Oregon river, Dr. Nutlall. 



The Lettered Emys. Emys scripta, Merrem, Tent 24. 

 Gray, Syn. 29. Testudo s. Schoepf. Jo', t. 3, /. 4, 5. Shaw, Zool. 

 t. 12 baud. K. ii. 140. T. serrata, Daud. R. ii. 148, t. 21, /. 

 1,2. Schoepf. t. 3, / 5. Schweiger, 301. Dum. $■ Bib. E. G. 

 ii. 267. Holbrook, N. A. Herpet. ii. 31 , t. 5. Testudo rugosa, 

 var. Shaw, Zool. iii. 29. 



Shell oblong, longitudinally rugose, keelless, slightly toothed 

 behind, brown, irregularly yellow ringed, and with irregular yellow 

 streaks on the sides ; nuchal shield linear, porrect ; vertebral 

 shields bluntly keeled, 1 st urceolate, 4th and 5th six-sided : under 

 margin with a black spot on the back edge of each plate ; sternum 

 rather convex, yellowish, with a spot on the centre of each gular 

 plate, and four on each side of the costo-sternal symphysis ; head 

 with a yellow central line, and a triangular spot behind each eye. 



a. Adult. N. America. Middle and front claws moderate, ster- 



num with solid black spot in front. 



b. Young, 8 inches. Presented by Gen. Thomas Hardwicke. 



c. Half grown. N.America. Three middle front claws elongate, 



sternum with black rings. 



d. Half grown. N. America. Presented by J. E. Gray, Esq. 



e. Half grown ; in spirits. Three middle front claws elongate, 



sternum with black spots. N. America. From the Leyden 

 Museum. 



Holbrook's Emys. Emys Holbrookii. 



Shell oblong, rather convex, scarcely keeled, longitudinally 

 rugose, pale, each shield with two oblong concentric rings, those 

 of the vertebral plates longitudinal, of the costal transverse ; mar- 

 ginal plates each occupied with two half round spots, formed of 

 concentric rings ; sternum yellow, with a large black spot on each 



