472 HENRY C. TRACY 



4. The lateral recess communicates with the exterior through 

 the lateral-line canals, and with the cavum cranni through the 

 arch under the falciform process of the prootic bone. Hence 

 there exists a free channel for the transmission of changes in 

 water pressure from the outside to the fluid in the perilaby- 

 rinthine spaces. 



5. The cranial nerves, from the third to the tenth, correspond 

 in the general course and distribution of their branches to the 

 nerves as described for Menidia. The branches of the trigemino- 

 facial nerve complex make their exit from the skull in close 

 relation to the surface of the prootic bony capsule. There is an 

 intracranial plexus of nerves in the perimeningeal tissue supplied 

 by recurrent branches of the seventh and tenth nerves. These 

 recurrent branches also supply the expansions of the lateral-line 

 canals in the lateral recess and in the temporal foramen. From 

 the utricular branch of the eighth nerve, three branches are 

 given off to supply the three divisions of the macula acustica 

 utriculi. 



BIBLIOGRAPHY 



Allis, E. p., Jr. 1897 Morphology of the petrosal bone and of the sphenoidal 



region of the skull of Amia clava. Zool. Bull., vol. 1. 



1903 The skull, the cranial and first spinal nerves in Scomber scomber. 



Jour. Morph., vol. 18. 

 De Beaufort, L. F. 1909 Die Schwimmblase des Malacopterygii, Morph. 



Jahrbuch, Bd. 39. 

 Brbschet, G. 1838 Recherches anatomiques et physiologiques sur 1' organs de 



1' ouie des poissons. (Memoires presente par divers savantes a 



r Academie Royale des Sciences, T. 5, Paris). 

 Bridge, T. W. 1900 The air bladder and its connections with the auditory 



organ in Notopterus borneensis. Jour. Linnean Soc, vol. 27. 

 Brooks, St. J. 1884 Osteology and arthrology of the haddock (Gadus aegle- 



finus). Proc. Roy. Soc. Dublin, vol. 4, N. S. 

 Hasse, C. 1873 Beobachtungen liber die Schwimmblase der Fische. Ana- 



tomische Studien, Bd. 1, Leipzig. 

 Herrick, C. J. 1899 Cranial and first spinal nerves of Menidia. Jour. Comp. 



Neur., vol. 9. 

 Mathews, J. D. 1886 Structure of the herring and other clupeoids. Fifth 



Rep. Fish. Bd., Scotland, Appendi.x F, Sessional Papers; House of 



Commons, 21, 1887. 

 Retzius, G. 1881 Das Gehororgan der Wirbeltiere. I. Gehorogan der Fische 



und Amphibien. Stockholm. 



