AUTHOR S ABSTRACT OF THIS PAPER ISSUED 

 BY THE BIBLIOGRAPHIC SERVICE, JUNE 30 



STUDIES ON THE NERVUS TERMINALIS: TURTLE^ 



O. LARSELL 



Department of Anatomy, University of Wisconsin 



SIXTEEN FIGUKES 



The present contribution was begun as part of a comparative 

 study of the nervus terminahs in several groups of vertebrates. 

 The work had not progressed far before it was found advisable to 

 confine attention to one group at a time, so that the greater 

 portion of the present report embraces the results of observa- 

 tions made since the studies on the nerve in mammals by the 

 author ('18) was published. 



The somewhat extensive literature of the nervus terminalis 

 was reviewed in the previous article, and only two papers which 

 have appeared on the subject during the past year will be men- 

 tioned briefly. These papers are by Van Wijhe ('18) and 

 Ayers ('19). 



Van Wijhe's paper reviews much of the literature of the nervus 

 terminalis in the various groups of vertebrates briefly and homol- 

 ogizes the nerve with one he noted a number of years ago ('94) 

 in Amphioxus, which he termed at that time the 'nervus apicis.' 

 He states: "Before the homologue of the profound ophthalmicus 

 there is in Amphioxus still another nerve which supplies the 

 utmost point of the snout. On account of this and because it 

 arises from the morphological fore-end of the cerebral ventricle I 

 called it the nervus apicis." 



Ayers ('19), in continuing his studies of Cephalogenesis, begun 

 long ago, has found the nervus terminalis (Van Wijhe's 'nervus 

 apicis') in Amphioxus, and calls attention to its large size as 



^ Contribution from the Zoological Laboratory of Northwestern University, 

 William A. Locy, Director, and from the Anatomical Laboratory, University of 

 Wisconsin, 



423 



THE JOURNAL OF (XJMPARATIVE NEUROLOGY, VOL. 30, NO. 5 



