240 LESLIE B. AUEY 



'iiervc (■()jii])()ii(Mils,' Ihcv luay l)c <lcsi^ji;itod as visceral efferent 

 eleineiits. 



Severance of the ()i)tic nerve of certain other hshes (Abramis 

 and Fiin(hihis) lias no inhibitory effect upon the movements of 

 the retinal i)i^inent or of the rod- and cone-cells, and a similar 

 relation has been reported for the frog by other workers. Hence 

 it is impossible to state the extent to which the mechanism dis- 

 covered in Ameiurus may be distributed throughout the verte- 

 brate group, if, indeed, it is not peculiar to Ameiurus alone. 



BIBLIOGRAPHY 

 Papers marked with an asterisk have not been accessible in the original 



Angelucci, a. 1890 Untersuchungen liber die Sehthatigkeit der Netzhaut und 



des Gehirns. Untersuch. zur. Naturlehre d. Menschen u. d. Thiere 



(Moleschott), Bd. 14, Heft 3, pp. 231-357, 2 Taf. 



1905 Physiologie generale de I'oeil. Encyclope.die frangaise d'oph- 



thalmologie, tome 2, pp. 1-141. 

 *Arcoleo, E. 1890 Osservazioni sperimentali sugli elementi contrattili della 



retina negli animali a sangue freddo. Annali d'Ottalmologia, Anno 



19, Fasc. 3 e 4, pp. 253-262. 

 Arey, L. B. 1915 The occurrence and the significance of photomechanical 



changes in the vertebrate retina — An historical survey. Jour. Comp. 



Neur., vol. 25, no. 6, pp. 535-554. 



1916 The movements in the visual cells and retinal pigments of the 



lower vertebrates. Jour. Comp. Neu-., vol. -6, no. 1, pp. 121-202. 

 BiRCH-HiRSCHFELD, A. 1906 Dcr Einfluss der Helladaptation auf die Struktur 



der Nervenzellen der Netzhaut, nach Untersuchung an der Taube. 



Arch. f. Ophthal., Bd. 63, Heft 1, pp. 85-111. 

 Cajal, S. R. 1894 Die Retina der Wirbelthiere. Bergmann, Wiesbaden, 4to, 



8 + 179 pp. 

 Carpenter, F. W. 1906 The development of the oculomotor nerve, the ciliary 



ganglion and the abducent nerve of the chick. Bull. Mus. Comp. 



ZooL, Harvard Coll., vol. 48, no. 2, pp. 141-229. 

 Catois, E. H. 1902 Recherches sur I'histologie et I'anatomie microscopique 



de I'encephale chez les Poissons. Bull. Sci. France et Belgique, Tom. 



36, pp. 1-166. 

 *Chiarini, p. 1904 Cambiamenti morphologici, che si verificano nella re ina 



dei vertebrati per azione della uce e dell' oscurita. Parte 1. Retina 



dei pesci e degli anfibi. Boll, della R. Accad. Med. di Roma, Anno, 30, 



pp. 75-110. 

 DiTTLER, R. 1907 tJber die Zapfenkontraktion an der isolierten Froschnetz- 



haut. Arch. f. ges. Physiol., Bd. 117, Heft, 5 u. 6, pp. 295-328. 



