02 



INDEX TO ILLTSTEATIONS. 



Calliostoma annulatum. 

 Attached to kelp. 



Calliostoma can alicula- 

 tum. Thin ; on kelp. 



Trochiscus Norrissii. 

 Ro<:ks. 



Omphalitis fusees c e n s. 

 Basal view. 



L e p t o n y x sanguineus. 

 Rocks. Shelly opercu- 

 lum. 



Plate IX. 



Haliotis Cr ach e r odii. 

 Rocks. 



Haliotis rufescens. Rocks. 



Fissurella volcano. 



Lucapina crenulata. 



Crepidula adunca. Shells. 



Plate X. 

 Hipponyx cranioides. 



Scurria mitra. Roots of 

 sea weeds. 



Nacella iucessa. Sea- 

 weed. 



Acmapa pelta. Rocks. 



Acmsea persona. Rocks. 



Acmsea patina. Rocks. 



Acmsea spectrum. Shells. 

 Plate XI. 



Lottia gigantea. Rocks. 



Tornatella punctocselata. 



Ischnochiton Magdalen- 

 sis. Under stones. 



Mopalia muscosa. 



Katherina tunicata. 

 Rocks. 

 Bulla nebulosa. 

 Plate XII. 



Placuanomia macroschis- 

 ma. 



Pecten aequisulcatus. 



Pecten latiauritus. Sea- 



weed. 



4. Hinnites giganteus Deep 



water. 



5. Lima orientalis. Sea- 



weed. 



6. M y t i 1 u s 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. Pachydesma crassatelloi- 



des. 



2. Saxidomus Nuttallii. 



3. Tapes staminea. Gravel. 



4. Rupellaria lamellifera. 



5. Amiantis callnsa. 



Plate XV. 



1. Tellina Bodegensis. 



2. Macoma i neon spi cua. 



Sand. 



3. Macoma nasuta. Mud. 



4. Psammobia rubroradiata. 



5. Donax Californicus. 



6. Maclnera patula. 



Plate XVI. 



1. Solerurtus C a 1 ifornicus. 



Mud. 



2. Platyodon cancellatus. 



3. Pholadidea penita. I n 



rocks. 



4. Zirphsea crispata. Hard 



clay. 



5. Parapholas Californica. 



In rucks. 



