145 



L.M.B.C MEMOIRS. 



No. VIII. PLEUBONECTES. 



(The Plaice.) 



BY 



F. J. Cole, Jesus College, Oxford, 



Lecturer in the Victoria University, Demonstrator of Zoology, 

 University College, Liverpool ; 



AND 



J. Johnstone, B.Sc, Loncl., 



Fisheries Assistant, University College, Liverpool. 



(Aided by a Grant from the Victoria University.) 



Contents. 



Introduction. 



page 



A. External Characters ... 148 



Asymmetry of Plaice 152 and 328 



B. Skeleton 155 



Skull and visceral arches... 155 



Vertebral column 184 



Median fins 193 



Limb girdles and paired 



fins 202 



C. Body Cavity and Viscera 207 



1. Coelomic Spaces 207 



Alimentary canal and 



glands 207 



Ductless glands 217 



Renal organs 221 



D. Blood Vascular System... 228 



Structure of Gills 231 



Pseudobranch 240 



Appendix- 

 A. Life History and Habits. — 

 Distribution and 



Spawning ,..,..,.. 343 



PAGE 



E. Nervous System 247 



1. Brain and Spinal Cord... 247 



2. Cranial Nerves 254 



Component Theory 255 



V.-VII. Complex 265 



N. Profundus V 269 



X. Complex 282 



3. Spinal Nerves 289 



4. Sympathetic 300 



P. Sense Organs 307 



1. Lateral Sense Organs ... 307 



2. Nose 315 



3. Eyes 318 



Discussion of Asymmetry 152 



and 328 



4. Ear 334 



G. Reproductive Organs 337 



-Economic. 



B. Plaice Fisheries. — 

 Regulations and Remedial 

 Measures 363 



