2o6 Journal of Comparative Neurology. 



ated cells, but are found on other cells, of a probably glandular 

 and sensory nature. Fibrils applied closely to the basement 

 membrane may be seen to end on the base of certain ciliated 

 or mucous cells in disk shaped endings, then continue their 

 course touching other cells in like manner before finally ending 

 on a cell. (See Fig. 3.) Such endings are described and fig- 

 ured by Peabody in the ampullae of Selachians and Bethe in 

 the gustatory epithelium of the frog. 



Since this work was begun I have in continuing my obser- 

 vations during the summer of 1898, succeeded in demonstrating: 



(i). The sensory nature of the buccal tentacles and dis- 

 tribution of nerves to the same. 



(2). The sensory nature (in part at least) of the ciliated 

 funnel (dorsal tubercle). 



(3). Sensory papillae and sensory cells in the body epi- 

 thehum. 



(4). Muscle endings in the body musculature. 



A later paper will contain further observations on the peri- 

 pheral nervous system and its relation to the central system in 

 Molgula and Cynthia. 



Aug. 25th, 189S. 



The Elements of the Central Nervous System of the 



Nemerteans. 



By Thos. H. Montgomery, Jr., Ph.D. 



(Lecturer in Zoology, University of Pennsylvania.) 



The studies forming the basis of this communication were 

 published in the "Journal of Morphology," Vol. 13, 1897. 



The genera Cerebratulus and Lineus were investigated, the 

 elements of the nervous system in the American Metanemer- 

 teans having been found, on account of their minute size, less 

 favorable for study. 



Four types of ganglion cells were found, which, in accord 

 with the nomenclature of Burger, may be referred to as cells 



