i2 journal of Eiitoiiiolog\' 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 nervous 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 

 alreacly described. 



.hidrcac 1882 



Beitrag ziir Anatomie und Histologic des Sifii/inulin niidus. 

 Zeit. f. Wiss. Zool. t. x.xxvi. 



.hidrcivs,E. A. 1887 



Notes on tlu- anatoni) of Sipiiiuulus yuilt/ii I'ouit. Studies Biol. 

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



Dchi^c ct HcroiKird 1897 



Traite de zoologiquL' concrt'te. Les verniidicns. vol. v. Paris. 



U,illn-,B. 1889 



Bcitrage zur Kenntniss d<T Textur des Central nervensystem 

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

 Heft 2. 



Miirct'l, A. Hcnihrl 1907 



Recherches sur S!fiuiuiili//(S. Chap. i\ . Le system nerveux. 

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



Mchihiikoff,S. 1900 



Zeit. Wiss. Zool. Bd. Ixviii. 



UrnihciA. 1902 



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



Sp,iu/fl,J.ff'. 1912 



Beitragc zur Kenntnis der (k'phyren. Zeit. Wis.s. Zool. Bd. 

 xxxiv. 



irord,H.li. 1891 



Some points on the anatomy and historv of Sipu/unliis iiiidiiy. 

 Bull. Mus. Comp. Zool. Har\ard College. 



t ('.iiiitnlintiuii jidin Ihr '/.(inhii/ical Lahiniitniy i)f Poinnnti C'llhgt) 



