TIIK FRESH-WATER FISIIKS <>F 



Pharyr.geal Teeth of Chondrostomn nasus 197 



Chondrostoina phoxinus - - 198 



Head of Chondrostoma phoxinus, from below - 198 

 Chondrostoina genei - - 199 



Head of Cbondrostoma geuei, seen from below - 199 

 Chondrostoma soetta ... - - 201 



Cbondrostoma knerii ... . 202 



Head of Chondrostoma knerii, seen from below - 203 



Rhodeus amarus 208 



Phaiyngeal Teeth of Ehodeus amarus - - 208 



Abramis brama 210 



Pharyngeal Teeth of Abrainis brama - - 211 



Abramis brama, var. vetula - - 214 



Abramis vimba - - .... 215 



Abramis elongatus - 217 



Abramis ballerus ... - 218 



Abrainis sapa ... - - 220 



Abramis leuckartii, hybrid between Leuciscus 



rutilus and Abramis brama .... 222 



Abramis (blicca) bjorkna 223 



Pharyngeal Teeth of Abramis (blicca) bjorkna - 225 

 Abramis bjorkna, var. laskyr- - 225 



Abramis bipunctatus - - 227 



Aspius rapax - ' - - - ' - - - - 230 

 Pharyngeal Teeth of Aspius rapax - - 231 



Pbaryngeal Teeth of Alburnus lucidus - - 232 



Alburnus lucidus - 233 



Alburnus lucidus, var. breviceps - - 235 



Alburnus alburnellus 236 



Alburnus alburnellus, var. fracchia - 237 



Alburnus mento 238 



Leucaspius delineatus - - 241 



Leucaspius delineatus - - 241 



Pelecus cultratus 243 



Pharyngeal Teeth of Pelecus cultratus - 244 



Misgurnus fossilis 246 



Nemachilns barbatulus - - 249 



Cobitis tsenia 252 



Cobitis toenia, var. elongata - - 254 



Clupea alosa, with caudal scales - - 257 



Sabno salar 267 



He ad of Salmo salar 268 



Salmo obtusirostris 286 



Vomer of Salmo obtusirostris .... 87 

 Vomer palatines and maxillary arch of Salmo 



obtnsirostris 287 



Salmo fario, var. ausonii .... 291 



Salmo carpio 296 



Salmo dentex 298 



Salma spectabilis - 300 



Salmo marsiglii 302 



Front view of Vomer of Salmo marsiglii - - 302 



Salmo lacustris 304 



Front view of Vomer of Salmo lacustris - - 304 

 Salmo lacustris, var. schiffermiilleri - - - 305 

 Front view of Vomer of Salmo schiffermulleri - 305 

 Salmo genivittatus - ..... 315 

 Salmo salvelinus 3jg 



PAGE 



Salmo umbla - 322 



Salmo hucho - - 329 



Coregonus lavaretus - 339 



Coregonus wartmanni - - 342 



Coregonus hiemalis - - 346 



Thymallus vulgaris - - 353 



Esox lucius 361 



Umbra krameri .... . 366 



Head of Umbra kraineri, seen from above - - 367 



Scale of Umbra krameri .... . 367 



Anguilla vulgaris - - 374 



Anguilla eurystoma 380 



Acipenser glaber - - 385 

 Upper surface of Head of Acipenser glaber, 



showing Dermal Scutes - - - - . - 385 

 Under side of Head of Acipenser glaber, show- 

 ing Mouth and Barbels, and Pores on the 



under side of the Rostrum .... 385 



Acipenser ruthenus 388 



Acipenser ruthenus, showing the Cranial Scutes 



on the upper side of the Head - 389 

 Acipenser ruthenus, showing the under side of 



the Head, Mouth, Barbels, Pores, etc. - - 389 



Acipenser ruthenus, var. gmelini .... 391 



Acipenser gmelini, Head seen from above - - 392 



Acipenser gmelini, Head seen from below - - 392 



Acipenser stellatus 393 



Acipenser stellatus, Head seen from above - - 394 



Acipenser stellatus, Head seen from beneath - 394 



Acipenser guldenstadtii, var. schypa - - 396 



Acipenser schypa, Head seen from above - - 397 



Acipenser schypa, Head seen from below - - 397 



Acipenser giildenstadtii - ... 399 



Acipenser giildenstiidtii, Head seen from above - 400 



Acipenser giildenstadtii, Head seen from below - 400 



Upper surface of Head of Acipenser naccarii - 403 

 Upper surface of Head of Acipenser naccarii, 



var nardoi 403 



Acipenser heckelii - - - - - - - 40 1 



Head of Acipenser heckelii, seen from above - 406 



Head of Acipenser heckelii, seen from below - 406 



Head of Acipenser nasus, seen from above - - 408 



Head of Acipenser uasus, seen from below - - 408 



Acipenser sturio - .... 410 



Head of Acipenser sturio, seen from above - - 411 



Head of Acipenser sturio, seen from below - - 411 



Acipenser huso - ... 414 



Head of Acipenser huso, seen from above - - 41C 



Head of Acipenser huso, seen from below - - 416 



Petromyzon marinus 422 



Head of Petromyzon marinus, seen from 



below 422 



Petromyzon fluviatilis 424 



Petromyzon fluviatilis, Head seen from below - 425 



Petromyzon branchialis 428 



Petromyzon branchialis, Head seen from below - 428 

 Larval form of Petromyzon branchialis, formerly 



known as Ammoccetes - - - 429 



