62 INDEX TO ILLUSTRATIONS. 
8. Calliostoma annulatum. 
Attached to kelp. 
4. Calliostoma can alicula- 
tum. Thin ; on kelp. 
5. Trocliiscus N orrissii. 
Hocks. 
6. Omphalius fusees c e n s. 
Basal view. 
7. Leptonyx sanguineus. 
Rocks. Shelly opercu- 
lum. 
Plate IX. 
1. Haliotis Cr a c li e r o d i i. 
Rocks. 
2. Haliotis rufescens. Rocks. 
3. Fissurella volcano. 
4. Lucapina crenulata. 
5. Crepidula adunca. Shells. 
Plate X. 
1. Hipponvx cranioides. 
2. Scurria mitra. Roots of 
sea weeds. 
3. Nacella incessa. Sea- 
weed. 
4. Acmsea pelta. Rocks. 
5. Acmsea persona. Rocks. 
6. Acmsea patina. Rocks. 
7. Acmsea spectrum. Shells. 
Plate XI. 
1. Lottia gigantea. Rocks. 
2. Tornatella punctocselata. 
3. Ischnochiton Magdalen- 
sis. Under stones. 
4. Mopalia muscosa. 
5. Katherina tunicata. 
Rocks. 
6. Bulla nebulosa. 
Plate XII. 
1. Placuanoraia macroschis- 
ma. 
2. Pecten sequisulcatus. 
3. Pecten latiauritus. Sea- 
weed. 
4. Hinnites giganteus Deep 
water. 
5. Lima orientalis. Sea- 
weed. 
6. My til us Californianus. 
Rocks. 
Plate XIII. 
1. Adula falcata. In rocks. 
2. Septifer bifurcatus. 
3. Chama pellucida. Rocks, 
4. Cardium corbis. 
5. Lucina Californica. 
6. Kellia Laperousii. Holes 
in rocks. 
7. Lazaria subquadrata. 
Plate XIV. 
1. Pacliydesma crassatelloi- 
des. 
2. Saxidomus Nuttallii. 
3. Tapes staminea. Gravel. 
4. Rupellaria lamellifera. 
5. Amiantis callosa. 
Plate XV. 
1. Tellina Bodegensis. 
2. Macoma i neon spi c ua. 
Sand. 
3. Macoma nasuta. Mud. 
4. Psammobia rubroradiata. 
5. Donax Californicus. 
6. Maclisera patula. 
Plate XVI. 
1. Solecurtus Californicus. 
Mud. 
2. Platyodon cancellatus. 
3. Pholadidea penita. In 
rocks. 
4. Zirphsea crispata. Hard 
clay. 
5. Parapholas C a lifornica. 
In rocks. 
