CRANIAL NERVES OF GANOIDS 
193 
General cutaneous components occur in the tenth and possibly 
the seventh nerves of Polyodon and Scaphirhynchus, but not in 
such relatively large amounts as in Amia- and Polyodon. 
On the basis of the origin, composition and distribution of the 
cranial nerves the Holostei are sharply distinct from the Chon- 
drostei, supporting in this way the more general conclusions of 
comparative anatomy. 
This paper is intended as a preliminary report, to be followed 
by a more extended account with ample illustrations, in which 
the related literature will be discussed, especially the agreements 
and disagreements with the classic accounts and discussions of 
the ganoid fishes by Allis. 
Department oe Zoology, 
Grinnell College. 
