ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 
683 
East Asia. West America. 
J VC Lasea rubra .......... 
JK VC Mytilus edulis ........ 
— VC Modiola modiolus ...... 
— V = Modiolaria marmorata . . 
JK V_ = Modiolaria levigata .... 
— I Crenella decussata...... 
JK V_ Nucula tenuis 
Beg ee. VCIF Acila castrensis .... 
K V_Yoldia lanceolata 
‘Ve Leda minuta 73332104 
I Limea subauriculata.., . 
VC Hinnites giganteus 
(Asia) | V_ Limnea palustris ...... 
— VC Cylichna attonsa ...... 
— V_ Haminea hydatis ...... 
— VC Dentalium Indianorum. . 
JK,ceca | V  Lepeta cecoides ...... 
_ V_ Margarita helicina...... 
— Ve Margarita PVahlii...... 
— V Mésalia lacteola........ 
— V_=Lacunavincta ........ 
K(turricula})V Bela fidicula .......... 
— V_ Bela excurvata ........ 
— VC Scalaria Indianorum .... 
K V_ Velutina laevigata ...... 
1 V  Natica clausa.......... 
—_ V CI Eulima micans........ 
— V_ Cerithiopsis tubercularis 
— VI Triforis adversus ...... 
— CI Erato columbella ...... 
— VC Purpura saxicola ...... 
_ V_ Chrysodomus liratus.,.. 
— V_ Trophon multicostatus . . 
127 
Cobboldiz, RM 
RM 
RM 
C 
Cortesyi, C 
M 
eylindracea,CR 
entale, M 
turricula, R 
Trevelliana, R 
M 
R 
polita, CR 
C 
C 
Maugerize, C R 
British. 
rubra 
edulis 
modiolus 
marmorata 
nigra 
decussata 
tenuis 
caudata 
subauricul. 
palustris 
attonsa 
hydatis 
entale 
(czeca, Vor.) 
helicina 
yvincta 
turricula 
Trevelliana 
communis 
leevigata 
(Norway) 
micans 
tubercularis 
adversus 
lapillus 
(N orway) 
E. America. 
edulis 
modiolus 
marmorata 
leevigata 
glandula 
tenuis 
lanceolata 
minuta 
palustris 
striolatum 
ceca, Gr. 
helicina 
Vahlii, Gr. 
lactea, Gr. 
vincta 
turricula 
levigata 
clausa 
—— 
CYVasr) 
lapillus 
10-costatus 
Gunneri 
. The following species (besides others dredged by Mr. A. Adams, but not 
yet determined) have been found on both the Asiatic and American shores of 
the N. Pacific, in addition to those recorded by Middendorff, v. Brit. Assoc. 
Report, p. 223. 
Terebratella Coreanica. 
Waldheimia Californica. 
Waldheimia pulvinata. 
Waldheimia Grayi. 
Glycimeris generosa. 
Schizothrus Nuttallii. 
Solen sicarius. 
Sanguinolaria Nuttallii. 
Tellina Bodegensis. 
Cardium modestum., 
Amusium caurinum. 
Placunanomia macroschisma. 
oe grandis. 
 Drillia inermis. 
Lunatia palli 
Priene Orego 
da. 
nensis, 
Cerostoma foliatum. 
Siphonalia Kellettii. 
128. The Vancouver and Californian districts have so many characteristic 
species in common (111 out of 492), that they must be regarded as con- 
stituting one fauna, differing as do the British and Mediterranean regions, 
Full particulars as to the range of the different species may be expected in 
Dr. Cooper’s Report to the Californian Geological Survey. One fact must, 
however, be here specially noted, viz. the great peculiarity of the island-fauna. 
Although the Sta. Barbara group are so near the mainland, the dredge has 
not only produced maiuy species not known on the continent, but also many 
