EERATA. 



Page 'i'iS, line 3, for C/iri/semi/s picta^ read Chrysemys 

 marginata. 



Page 242, lines 8 and 12 from bottom, and page 248, line 

 1, for Macroclemys read Macrocleramys. 



Page 240, line () from bottom, for 1824 read 1825, and be- 

 fore pp. insert IV. 



Page 317 for algae read Algas. 



Page 353, line 4 from bottom, for Menopomida? read Cryp- 

 tobranchidse. 



Page 367, line 8 from bottom, for relations read relation. 



Page 378, line 7, dele period after prehension. S. Garman 

 is authority for last sentence of paragraph only. 



Page 385, line 4 from bottom, dele comma after its. 



