XII 
CONTENTS. 
Order IV. Physostomi or Malacopteri—Continued. 
Gila...j. 284 
1. Gila robusta_ 285 
2. Gila elegans_______ 286 
3. Gila gracilis_____ 287 
Tigoma. 288 
1. Tigoma conformis______ 289 
2. Tigoma bicolor_____ 289 
3. Tigoma obesa ...._____ 290 
4. Tigoma humboldti__ 291 
5. Tigoma egregia........ 291 
6. Tigoma lineata________ 292 
7. Tigoma gracilis. 293 
8. Tigoma crassa_ 293 
Cheonda. 294 
1. Cheonda cooperi__ 294 
2. Cheonda coerulea_ 295 
Siboma. 296 
1. Siboma crassicauda_ 296 
• 2. Siboma atraria. 297 
Ptychocbeilus_ 298 
1. Ptychocheilus oregonensis_ 298 
2. Ptychocheilus grandis _ 299 
3. Ptychocheilus rapax_ 300 
4. Ptychocheilus vorax_-_- 301 
Clinostomus____-.-... 302 
Family Cyprinodontidae_- 302 
Fundulus_ 303 
Fundulus parvipinnis______-.. 303 
Family Esocidae_ 304 
Family Salmonidae.. 304 
Salmo.-. 305 
1. Salmo scouleri__ 305 
2. Salmo quinnat__ 306 
3. Salmo spectabilis_ 307 
Fario. 308 
1. Fario aurora__ - 308 
2. Fario tsuppitch.....-. 310 
3. Fario argyreus_ 312 
4. Fario gairdneri_ 313 
5. Fario clarkii. - 314 
6. Fario stellatus..-.-. 316 
Salar. 318 
1. Salar lewisi_-_------- — -- 318 
2. Salar virginalis_ 320 
3. Salar iridea_ 321 
Osmerus__ 323 
Osmerus pretiosus__...--- -- 324 
Thaleichthys_- 325 
Thaleichthys stevensi_ 325 
Coregonus_ 326 
Coregonus williamsoni_ 326 
Family Scopelidae_ 328 
Saurus (Laurida) lucioceps_ 328 
Family Clupeidae. 328 
