vi TABLE OF CONTENTS. 



PAGE 



The SLUG (Limax ater), Fig. 5 ..12 



The WHELK (Buccinum undatum), Figs. 6, 7 . 12, 13 



PISCES. 



ANATOMICAL HISTORY . . 15 



PLATE VI. 



The sympathetic nerve of the COD (Gadus Morrhua) 20 



PLATE VII. 



The spinal nerves of the COD (Gadus Morrhua) 22 



PLATE VIII. 



The dorsal aspect of the brain and spinal cord of the COD (Gadus Morrhua), Fig. 1 . . . .24 



The base of the brain and the origins of the nerves, Fig. 2 25 



The brain dissected, Figs. 3, 4 26 



PLATE IX. 



The sympathetic nerve of the SKATE (Raia Batis) 27 



PLATE X. 



The dorsal aspect of the brain and spinal cord of the SKATE (Raia Batis), Fig. 1 . . . .29 



The base of the brain and the ventral aspect of the spinal cord, Fig. 2 30 



The brain dissected, Figs. 3, 4 31 



PLATE XL 



The dorsal aspect of the nervous system of the SKATE (Raia Batis) .... . . 32 



