274 



MB. W. E. COLLINGE ON THE 



[Apr. 2, 



sent to the British Museum by Dr. F. "Werner, viz. Chamoeleon 

 fisclieri, Reichenow, and Ch. spinosus, Matschie. Special interest 

 attached to these species from the fact that they appeared to be 

 more nearly related to the Madagascar species Ch. hificlus and 

 Ch. nasutus than to any of the numerous forms previously known 

 from Continental Africa. 



The following papers were read : 



On the Sensory Canal System of Fishes. Teleostei — 

 Suborder A. Physostomi. By Walter Edward 

 CoLLiNGE, F.Z.S., Assistant Lecturer and Demonstrator 

 in Zoology and Comparative Anatomy^ Mason College, 

 Birmingham. 



[Eeeeived March 11, 1895.] 



(Plates XVIII.-XXI.) 



Contents. 



Page 



I. Introductory 274 



II. SiiiUEiD^ 276 



1. Clarias nieuhofii 275 



General Description ... 275 

 Course of tlie Canals 



and Branches 276 



Innervation. {Clarias 

 magur.) 277 



2. Amiurus catus 278 



General Description . . . 278 

 Course of the Canals 



and Branches 279 



Innervation 280 



3. Pimelodus maculatus . . . 282 

 General Description ... 282 

 Course of the Canals 



and Branches 283 



Innervation 284 



4. Callichthys littoralis ... 285 

 General Description ... 285 



III. Cyprinid.e 286 



Labeo dussumieri 286 



IV. 



VI. 



VII. 

 VIIL 



Page 



EsociD^ 287 



Esox lucius 287 



General Description ... 287 

 Course of the Canals 



and Branches 287 



Innervation 289 



SALM0NID.E 290 



Salmo salar 290 



General Description . . . 290 

 Course of the Canals 



and Branches 290 



Variation 291 



MUR.ENID.E 292 



Conger conger 292 



General Description ... 292 

 Course of the Canals 



and Branches 292 



Innervation 294 



Summary 296 



Bibliography 297 



Explanation of the 

 Plates 298 



I. Introductory. 



The system of sensory canals in the Teleostean fishes exhibits 

 so many featm-es of interest both as regards the morphology and 

 histology, and the relations of the cranial nerves to the canals, 

 that it will not be possible to here treat of more than a single sub- 

 order, viz. the Physostomi. The system has been carefully worked 

 out in a number of genera and the most interesting species 



