ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 621 
Pan. | La |Aca-| Maz. 
Cat. |Paz.| pul.| Cat. 
P| A |170 
A | 172 
iP A |176 
Pp A | 175 
P| C/}181 
iP C | 189 
418 A | 190 
420| P 
192 
424 C | 193 
423| P 195 
416 A |} 194 
12 G 
696 
201 
395 200 
P| A | 202 
391} P| C | 204 
393 | P| A | 205 
206 
EP WAG |... G: 
387 | P| A | 207 
2 G 
iP 
390 
385 208 
386 C | 210 
381 A | 211 
383 | P 212 
215 
384 | P 215 
821| P| A | 224 
225 
A | 226 
229 
240 
P A | 239 
235 
243 
Other 
No. 
habitats.! ~ 
L. Mar. 
Gal. 
eahesic| 
E 
E. Mar. 
E 
EK 
E. Mar. 
Gal. 
119 
120 
121 
122 
123 
124 
125 
145 
Mare. 
L.Cal. 
L 
146 
147 
148 
149 
150 
151 
152- 
156 
157 
158 
159 
160 
161 
162 
163 
164 
165 
166- 
172 
178 
174 
List of Cape St. Lucas Shells. 
Modiola capax. A few living sp. “ Gal.” [?]. 
Crenella coarctata. In Spondylus. 
Lithophagus aristatus. Ta Spondylus. 
Lithophagus plumula. Tn Spondylus. 
Arca mulicostata. Adult valves, and jun. living. 
Byssoarca Pacifica. Raye. 
Byssoarca mutabilis. Valve. 
Barbatia Reeviana. Valves. 
Barbatia vespertilio. Valves. 
Barbatia illota. Valve. 
Barbatia solida. Rave. 
Barbatia gradata. Valve. 
Axinea gigantea. Large valves, and jun. living. 
Axinea, sp. ind. 
Pinna lanceolata. Fragment. 
Pinna maura. 1 sp., jun. 
Pinna rugosa. 1 sp., yun. 
Margaritiphora fimbriata, Living. 
7 Avicula Peruviana. Valves. 
Lsognomon Chemnitzianus. Common, living. 
Isognomon Janus. 4 sp. living. [One has close 
ligament-pits, passing into costellatus, just as no. 
38, var. passes into meisus. | 
Pecten submodosus. Several valves, and 1 living. 
[P. intermedia is only a var. of this species. ] 
Pecten ventricosus. Valves. [The young is P. 
circularis, Sby., pars. | 
Janira dentata. Very plentiful. 
Lima tetrica. 1 living, and valves [= L. squamosa, 
teste Cuming. W.I., Mediter., Pac. Is. ]. 
Lima arcuata. 1 fresh pair. [Can hardly be separa- 
ted from L. fragilis, Gal., Pac. Is.,in Mus. Cum. ] 
Spondylus calcifer. Valves. Red var., and speci- 
men changing into purple. 
Plicatula penicillata. 1sp. on Fasciolaria. 
Ostrea wridescens. A few living. 
Ostrea ? Virginica, jun. 
Ostrea Columbiensis. Valves. 
Ostrea amara. On Pomaulax. 
Cavolina ?telemus. Fragment. (Pelagic.) 
[Nudibranchs and Aplysia. Not yet determined. ] 
Bulla Adams, and var. Common. 
Bulla nebulosa, Rave. 
Bulla Quoyi. Very rare. 
Haminea vesicula. Plentiful, living. 
Haminea cymbiformis. 1 sp. [Closely related to 
AI. virescens. | 
Siphonaria equilirata. Dead. (ful. 
Siphonaria lecanium, with var. palmata, &c. Plenti- 
Onchidium Carpenteri. Very rare. 
Melampus olivaceus, Rare. 
[The rest of the Pulmonates will be tabulated 
afterwards, vide p. 630. ] 
Lanthina decollata. Very rare. 
Ischnochiton Magdalensis. Large and highly sculp- 
tured. Very rare. 
