EMYSHIEROGLYPHICA. 49 



plates form a complete circle, in which are enclosed two yellow spots. The colour 

 of the sternum is a dirty yellow, with a black blotch at the external border of the 

 thoracic and abdominal plates. 



The head is dark brown; a yellow line begins at the snout, runs between the 

 eyes, increasing in breadth, and terminates behind the orbit; another line of the 

 same colour begins behind the orbit, small at first, but increasing in size till it 

 forms a large yellow blotch, out of which issues another yellow line which runs 

 along the neck. Below these lines are two broad yellow bands, also beginning 

 behind the orbit; these communicate by a vertical band passing over the anterior 

 part of the tympanixm, and are afterwards continued along the neck. A small 

 yellow line begins on each side, beneath the nostrils, and is continued to the middle 

 of the upper jaw; another line of similar colour goes from the centre of the chin, 

 and extends across the throat, from the posterior part of which is extended along 

 the lower jaw and neck a broad band, which is continuous at the articulation of 

 the jaw, with the band passing down from the orbit; on the throat is another large 

 blotch, from which are extended posteriorly one or two yellow lines. 



The colour of the anterior extremities is dark brown in front, with a large yellow 

 longitudinal band above extending throughout, and one or two smaller and less 

 extensive above. The posterior extremities are dark brown, with large longitudinal 

 yellow bands along the nates and posterior part of the thighs, and smaller ones 

 on the superior surface of the thigh and leg; on the inferior surface of the thigh 

 and leg are several very extensive yellow bands and blotches, all ending at the 

 tarsus; the membrane between the toes is marked with a longitudinal yellow line; 

 the tail is dark brown above and below, with two longitudinal yellow lines. 



Dimensions. Length of shell, 12 inches; of sternum, Oi- inches; breadth of shell, 

 7 inches; height of shell, 3 inches; length of tail, 3 inches; length beyond the vent, 

 li inch. 



Geographical Distribution. It is found in our western waters. Professor 

 Vol. I.— 7 



