APPENDIX. 267 



loises, (Emys,) particularly to that of E. geographica of 

 Lesueur. Their young are often found with them, attached 

 in considerable numbers to the abdomen. The superior 

 surface of the body is subject to vary considerably in the 

 arrangement of its colours. In one specimen the fuscous colour 

 prevails and is interrupted only by dull-yellowish distant 

 points, which, in their disposition exhibit an approach to 

 the formation of three longitudinal irregular series ; in an- 

 other individual an arrangement into three series is still 

 more obvious; the lateral quadrate spots, the yellowish 

 vitta, at least on the anterior portion of the body, and the 

 ventral lines, appear to be permanent characters. The form 

 of this species is similar to that of the H. sivampina of 

 Bosc, but it cannot be the same from its number of eyes 

 and the lineation of its inferior surface. The flat inferior 

 surface and the acute lateral edges seem formed to exclude 

 the air and assist the disks in their office of adhering to a 

 foreign body. 



2. H. lateralis. Dull livid with a rufous line each side ; 

 ocular points six. 



Descr. This species is more elongated than the preced- 

 ing, and far less depressed ; the colour of the body is uni- 

 form dull livid, not at all paler beneath, but the rufous line 

 each side extending the whole length of the body, is ra- 

 ther broad, and although dull, is yet very distinct; on the 

 superior surface are a few very remote minute black points ; 

 the ocular points are placed in a regularly curved line. 



Length when at rest two inches and three-fourths. 



This species occurred in most of the small lakes on the 

 height of land, between Rainy Lake and Lake Superior. 



3. H. marmorata. Blackish varied with dirty whitish ; 

 ocular points six. 



Descr. Body slightly broadest in the middle, from 



