¢ 
On the Classification of Nemertes and Planarie. 41 | 
Art. 1V.—An Essay on the Classification of Nemertes and 
Planarie: Preceded by some general considerations on the 
primary Divisions of the Animal Kingdom; by CHARLES ~ 
GiRarD. 
Read before the American Association for the Advancement of Science, at New 
Haven, August, 1850. 
. 
I am gathering materials for a monograph of the Nemertes of 
foundations of our classification are the results of his labors. 
Nor shall I at present enter upon the secondary divisions to be 
established among the Nemertes and Planariz ; this aspect of the 
question cannot be settled until we are better acquainted with the 
organization of the group of Rhabdoccela or freshwater Planarie. 
II. 
_ Before however I treat of the Nemertes and of the Planarie 
ina more particular manner, I have a few words to say on the 
subordination of characters in the primary groups of the animal 
kingdom. 
* Ann. Sc. Nat., 3d Série, iv, 1845, p. 129. 
) Sznies, Vol. XI, No. 31.—Jan., 1851. 6 
