PROGRESS OF MINUTE ANATOMY 99 
animals became obsolete. The chief value of his work now 
lies in what he considered its secondary feature, viz., that of 
the detailed anatomy of the cockchafer, one of the common 
beetles of Europe. Owing to changed conditions, therefore, 
it takes rank with the work of Malpighi and Lyonet, as a 
monograph on a single form. Originally he had intended 
to publish a series of monographs on the structure of insects 
typical of the different families, but that upon the cockchafer 
was the only one completed. 
Comparison with the Sketches of Lyonet.—The quality 
of this work upon the anatomy of the cockchafer was excel- 
lent, and in 1824 it was accepted and crowned by the Royal 
Institute of France. The finely lithographed plates were 
prepared at the expense of the Institute, and the book was 
published in 1828 with the following cumbersome title: Con- 
sidérations Générales sur ? Anatomie com parée des Animaux 
Articulés auxquelles on a joint Anatomie Descriptive du 
Melolontha Vulgaris (Hannelton) donnée comme example de 
’ Organisation des Coléopiéres. ‘The 109 sketches with which 
the plates are adorned are very beautiful, but one who com- 
pares his drawings, figure by figure, with those of Lyonet 
can not fail to see that those of the latter are more detailed 
and represent a more careful dissection. One illustration 
from Straus-Diirckheim will suffice to bring the achievements 
of the two men into comparison. 
Fig. 30 shows his sketch of the anatomy of the central 
nervous system. He undertakes to show only the main 
branches of the nerves going to the different segments of the 
body, while Lyonet brings to view the distribution of the 
minute terminals to particular muscles. Comparison of other 
figures—notably that of the dissection of the head—will 
bring out the same point, viz., that Lyonet was more detailed 
than Straus-Diirckheim in his explorations of the anatomy of 
insects, and fully as accurate in drawing what he had seen. 
