14 Howard Ayers and Julia Worthington 



It is connected with the cerebellar lobe of the opposite side by a fiber 

 tract. It is also connected by a fiber tract with the ventral motor 

 column of its own side of the brain, and with the ventral motor column 

 of the opposite side by the great number of fibers that cross in the 

 ventral raphe. It is connected with the nucleus funiculi, and hence 

 with the spinal cord, by a tract into which cells of the communis nucleus 

 also send processes. 



ISTeither the trigeminus, the facialis, nor the auditory nerves of 

 Bdellostoma are mono-functional nerves. Each carries at least two, 

 and probably more, sets of functionally distinct fibers. The auditory 

 nerve consists in reality of two distinct nerves, N. utricularis and N. 

 sacculai'is. N. utricularis carries a large general cutaneous component 

 that innervates the lining membrane of the ear apart from the sense 

 organs. The N. lateralis anterior runs with both trunks of. the tri- 

 geminus and probably with the facialis also. The N. lateralis posterior, 

 instead of being associated with the NN. glosso-pharyngeus and vagus, 

 has a trunk to itself. We have found no trace of lateral nerves or organs 

 in the region of the trunk, consequently a lateral line and nerve sensu 

 siriciu is not formed in Bdellostoma. 



CiNCixNATi, June, 1907. 



LITERATURE CONSULTED. 



1903. Allis, Edward P., Jr. Ou Certain Features of the Cranial Anatomy 

 of Bdellostoma dombeyi. Anatomischer Anzeiger, Bd. XXIII, pp. 

 260-281, 322-339. 



1892. Ayers, Howard. A Contribution to tbe Morphology of the A'ertebrate 



Ear, with a Reconsideration of its Functions. Journal of Mor- 

 phology, Vol. YI, Nos. 1 and 2. 



1907. Ayers, Howard, and Worthington, Julia. The Skin End-Organs of 

 the Trl(ieminus and Lateralis Nerves of Bdellostoma dombeyi. 

 American Journal of Anatomy, Vol. VIT, No. 2. 



1899. Clapp, Cornelia Maria. The Lateral Line System of Batrachus Tau. 

 Ginn & Co., Boston. 



1902. CoGHiLL^ G. E. The Cranial Nerves of Amblystoma tigrinum. Jour- 

 nal of Comparatii:e Neurology, Vol. XII, No. 3. 



1896. Cole, FRA^-K J. The Cranial Nerves of Chimfera monstrosa. Pro- 

 ceedings of the Royal Society of Edinburgh. 



1893. DoGiEL, A. S. Zur Frage liber das Verhalten der Nervenzellen zu 



einander. Archiv fur Anatomic und Physiologic. 



