EMYS OREGONIENSIS. 109 



subdividing them equally; the intermediate and two anterior on each side are 

 mottled with pale yellow. The sternum is yellow, with a large black blotch in 

 the centre, wliich is very beautiful, as may be seen in the accompanying plate, 

 but cannot be described; besides this, each brachial plate is marked in the centre 

 Avith a small circular spot of black. The wings are black, marked with yellow; 

 the under surface of the marginal plates is yellow, with a black spot, mottled with 

 yellow, at the junction of each plate. 



The head is dusky above, with small pale yellow lines. The jaws are horn- 

 colour; a yellow line begins at the posterior and superior margin of the orbit, and 

 runs along the lateral and superior border of the neck; another begins at the 

 posterior and inferior margin of the orbit, and descends to join a third and still 

 larger band that arises about the middle of the lower jaw; after the junction, they 

 extend along the lateral and mferior margin of the neck. The throat is dark 

 brown, with several longitudinal yellowish lines; one of these is remarkable — it 

 begins at the chin, soon splits, and forms two larger lines; between these two is 

 another and shorter line of the same colour. 



The anterior extremities are dark brown in front, with two longitudinal lines of 

 pale yellow; one runs near the middle, the other along the superior margin: these 

 lines are continued to the nails and to the webs, which are also yelloAv; the 

 inferior surface is dusky. The posterior extremities are dusky above, irregularly 

 marked with yellow; the convexity of the toes and the web being of the same 

 colour. The tail is dusky above, with three yellow longitudinal hues; below, it is 

 mottled with yellow. 



Dimensions. Length of shell, 7 inches 2 lines; breadth, 5 inches; sternum, 6h 

 inches; elevation, 2 inches 1 line; length of tail, 2| inches. 



Habits. Of the habits of the Emys Oregoniensis not much is known: it is said 

 to prefer clear and running waters. 



