116 VISION 



Sivak, J. G. and P. W. Gilbert. 1976. Refractive and histological study of 



accommodation in two species of sharks (Gingly mo stoma cirratum and 



Characharhinus milberti). Can. J. Zool. 54:1811-1817. 

 Somiya, H., and T. Tamura. 1973. Studies on the visual accommodation 



in fishes. Jpn. J. Ichthyol. 20:193-206. 

 Schwassmann, H. O., and D. L. Meyer. 1971. Refractive state and accom- 

 modation in the eye of three species of Paralabrax (Serranidae, Pisces). 



Vidensk Medd. Dan Naturhist. Foren. 134:103-108. 

 Tansley, K. 1965. Vision in vertebrates. Chapman and Hall, London. 110 p. 

 Verrier, M. L. 1928. Recherches sur les yeux et la vision des poissons. Bull. 



Biol. Fr. Belg. Suppl. XI:l-222. 

 Verrier, M. L. 1930. Contribution a l'etude de la vision chez les selachiens. 



Ann. Sci. Nat. Zool. Biol. Anim. 13:5-54. 

 Verrier, M. L. 1934. La refraction de l'oeil des poissons. Bull. Soc. Zool. 



Fr. 59:333-338. 

 Verrier, M. L. 1947. La vision des vertebres et les theories de la vision. 



Ann. Biol. Paris Ser. 3(24):209-238. 

 Walls, G. L. 1942. The vertebrate eye and its adaptive radiation. Cranbrook 



Institute of Science, Bloomfield, Hills, Mich. 785 p. 

 Wang, C. S. T. 1948. The eye of fishes with special reference to pigment 



migration. Ph.D. dissertation, Cornell University. 291 p. 



