

^^A- 



E 11 R A T A . 

 Plate o2, for '•' isocardiodes," read isocardiuides. 

 Page 11, 3d line from bottom, for " brevis(|UO,'' read brevibusque. 

 Paso 17, 13 lines from top, for " brevis," read brcvibus. 



