LINNZZUS AND NATURAL HISTORY 135 
worms that Cuvier has included in the radiate group, into 
another branch called Vermes. This separation of the four 
original branches of Cuvier was a movement in the right 
direction, and was destined to be carried still farther. 
Fic. 35.—Kari TH. von SIEBOLD, 1804-1885. 
Von Siebold (Fig. 35) was an important man in the 
progress of zodlogy, especially in reference to the comparative 
anatomy of the invertebrates. 
Leuckart (Fig. 36), whose fame as a lecturer and teacher 
