32 Journal of Entomology and Zoology 



Study of thin sections of the cord of this animal. Whethei the cells 

 actually anastomose or not is a questions hard to decide, but in 

 the numerous contacts of naked fibers there is, I believe, ample 

 opportunity for the transmission of complex changes from cell to 

 cell, to all parts of the ner\ous system. In this form there is no 

 particular localization of definite centers. 



The brain differs in structure from the cord, the central fibrous 

 mass is more dense, the cells are very much smaller and more 

 numerous. Some cells of the brain send their fibers out directly 

 without the common pathway of a distinct nerve trunk. No special 

 features of the brain were determined except the cerebral organs 

 already described. 



Andreae 1882 



Beitrag zur Anatomie und Histologic des Sipiinculiis niidiis. 

 Zeit. f. Wiss. Zool. t. xxxvi. 



Andrews, E. A. 1887 



Notes on the anatomy of Sifiiiiuulus yniildii Pourt. Studies Biol. 

 Lab. J. H. univ. vol. iv. 



Del age et Herouard 1897 



IVaite de zoologique concrete. Les vermidiens. vol. v. Paris. 



H alter, B. 1889 



Beitrage zur Kenntniss der 'lextur des Central nervensystem 

 Hoherer Wurmer. Arb. des Zoolog. Inst. Wien Tom. viii. 

 Heft 2. 



Marcel, A. Herubel 1907 



Recherches siir Sipiinciilhlts. Chap. iv. Le s\stem nerveux. 

 Mem. soc. d. France, t. xx. 



Melal,iikoff,S. 1900 



Zeit. Wiss. Zool. Bd. Ixviii. 



Herubel, A. 1902 



Sur le cerveux du Phascolosoine. Ac. d. Paris, cxxiv. 



Spe„gel,J.fr. 1912 



Beitrage zur Kenntnls der (iepii) ren. Zeit. Wiss. Zool. I?d. 

 xxxiv. 



Ward, H. B. 1891 



Some points on the anatomy and histor\ of Sifninn/li/s iimliis. 

 Bull. Mus. Comp. Zool. Harvard College. 



((jiiiiliihiilidii frani /lie Zui/l'it/irtil Liihitnitmy iif PuniniDi C.iiUii/c) 



