XIV 
CONTENTS. 
Page. 
Order IX. Plagiostomi—Continued. 
Family Scylliodontidae... 362 
Triakis-- 362 
Triakis semifasciatus_ 362 
Family Mustelidae.....-... 364 
Mustelus felis.-.-.-. 364 
Family Cestraciontidae___-___ 364 
Cestiacion_ 365 
Cestracion francisci_ 365 
Family Notidanidae- 366 
Heptanchus maculatus- 367 
Family Spinacidae---.-.--- 367 
Acanthias___-_ 367 
Acanthias sucklii- 368 
Sub-order II. Rajae....-......— 369 
Family Rhinobatidae_._ 369 
Ehinobatus. 370 
Rbinobatus productus_ 370 
Family Torpedinidae__ _ 371 
Narcine californica_ __ 371 
Family Raiidae_ 371 
Raja.......... 372 
Raja cooperi_._____ 372 
Uraptera. 373 
Uraptera binoculata_.___...... 373 
Family Myliobatidae... 374 
Rkinoptera .. 374 
lihinoptera vespertilio_ 375 
Order X. Dermopteri. 376 
Sub-order. Marsipobranchii s. Cyclostomi. 376 
Family Petromyzontidae_ 376 
Petromyzon_i_...._ 377 
1. Petromyzon tridentatus__ 377 
2. Petromyzon ciliatus_....._ 378 
3. Petromyzon lividus_ 379 
4. Petromyzon plumbeus_„_ 380 
5. Petromyzon astori_ 380 
Ichthyomyzon. 381 
1. Ichthyomyzon castaneus_ 381 
2. Ichthyomyzon hirudo_ 382 
Ammocoetes _ _ 383 
Ammocoetes cibariu's- 383 
Scolecosoma_ 384 
List of the plates_ - 385 
Alphabetical index. 389 
