MOLLUSCA AND SHELLS. 
Fig. 127. TRUNCATELLA PORRECTA, ventral view of the shell, en- 
larged ; 127 a, side view of the last whorl, enlarged, 127 0, aper- 
ture, closed by the operculum, enlarged ; 127 c, natural size.—p. 
110. 
Fig. 128. TRUNCATELLA ROSTRATA, front of the shell, enlarged, 
128 a, side of the last whorl, enlarged, 128 b, natural size.—p. 
111. 
Fig. 130. PLANORBIS CORPULENTUS, side vievv of the shell, vith 
the animal; 130 a, the locomotive disk of the animal; 130 0, the 
head, in outline.—p. 113. 
Fig. 151. PLANORBIS VERMICULARIS, enlarged view of the shell, 
from above; 181 a, the same, from beneath; 131 b, the same, in 
front; 131 c, natural size —p. 112. 
Fig. 132. PLANORBIS OPERCULARIS, enlarged view of the shell, 
from above; 132 a, the same, in front; 182 6, the same, from be- 
neath; 132 c, natural size. —p. 113. 
Fig. 133. PLANORBIS RERMATOIDES, outline of the shell, with the 
animal. —p. 114. 
Fig. 134. PHYSA VENUSTULA, shell with the animal, from be- 
neath; 134 a, lateral view of the shell and animal, enlarged, 134 
b, natural size. —p. 115. 
Fig. 135. PHYSA RIVALIS, shell, in outline, with the animal. —p. 
120. 
Fig. 136. PHYSA TABULATA, front view of the shell; 136 a, late- 
ral view of the animal and shell; 136 5, shell with the animal, 
seen from beneath.—p. 116. 
Fig. 137. PHYSA GIBBOSA, lateral view of the shell, with the 
animal, 137 a, front view of the shell.—p. 117. 
PEATE 9 20 
Fig. 138. PHYSA VIRGINEA, ventral view of the shell; 138 a, 
dorsal view of the shell.—p. 120. i 
Fig. 139. PHYSA SINUATA, ventral view of the shell; 139 a, pro- 
file view of the shell—p. 118. 
Fig. 140. PHYSA RETICULATA, an elongated specimen, ventral 
view; 140 a, dorsal view of the same; 140 b, dorsal view of a 
short specimen.—p. 118. 
Fig. 141. LIMNEA LEPIDA, ventral view of the shell; 14la, 
dorsal view of the shell.—p. 121. 
Fig. 142. LIMNEA VOLUTATA, ventral view of the shell, enlarged ; 
142 a, dorsal view of the same; 142 5, natural size.—p. 122. 
Fig. 143. DomBEYA OBOVATA, ventral view of the shell; 143 a, 
dorsal view of the shell.—p. 124. 
Fig. 144. DOMBEYA FLUMINEA, lateral view of the shell and ani- 
mal; 144 a, ventral view of the shell and animal.—p. 124. 
Fig. 145. DOMBEYA FASCIATA, ventral view of the shell; 149 a, 
dorsal view of the shell. —p. 123. 
Fig. 146. MELANOPSIS ZELANDICA, lateral view of the shell, with 
the animal; 146 a, ventral view of the same; 146 b, aperture of 
the shell —p. 130. 
Fig. 147. AMPULLARIA COLUMELLARIS, ventral view of the shell ; 
147 a, dorsal view of the shell.—p. 126. 
` Fig. 148. AMNICOLA ANTIPODARUM. 
Fig. 149. AMNICOLA COROLLA, the animal, enlarged, as seen from 
below; 149 a, lateral view of the animal, with the shell, enlarged ; 
149 2, ventral view of the shell, enlarged; 149 c, natural size.— 
p. 129. 
Fig. 150. AMNICOLA BADIA, ventral view of the shell, enlarged ; 
150 a, dorsal view of the shell, enlarged; 150 b, natural size.—p. 
126. 
Fig. 151. AMNICOLA GRACILIS, ventral view of the shell, en- 
larged, 151 a, dorsal view of the shell, enlarged; 1510, natural 
size.—p. 127. 
Fig. 152. 
enlarged ; 152 a, dorsal view of the shell, enlarged ; 152 b, natural 
CINGULA PETENINGENSIS, ventral view of the shell, 
size.—p. 130. 
Fig. 153. MELANIA TETRICA, ventral view of the shell; 153 a, 
dorsal view of the shell, 1580, outline figure of an unarmed 
specimen.—p. 183. 
Fig. 154. MELANIA CYBELE, ventral view of the shell; 154 a, 
dorsal view of the shell; 154 2, lateral view of the animal; 154 
c, the operculum, outer and inner surface.—p. 132. 
Fig. 155. MELANIA TERPSICHORE, ventral view of the shell; 155 
a, ventral view of the shell, 155 b, figure of a young specimen.— 
p. 133. 
Fig. 
156 a, 
young specimen, with the animal, to show the velvet; 156, 
156. MELANIA SCIPIO, lateral view of the animal and shell; 
locomotive disk of the animal; 156 b, lateral view of a 
young shell, to show the coloring; 156 d, profile view of the 
aperture; 156 e, the operculum, outer and inner surface. —p. 134. 
~ Fig. 157. MELANIA VAINAFA, lateral view of the shell, with the 
animal; 157 a, view of the shell, with the animal, from beneath; 
157 b, the operculum.—p. 138. 
Fis. 158. MELANIA SCITULA, ventral, 158 a, dorsal, and 158 2, 
profile views of the shell.—p. 140. 
Fig. 159. MELANIA LUTOSA, lateral view of the shell, with the 
animal; 159 a, the animal, seen from beneath; 159 b, profile of 
the aperture, in outline, 159 c, the operculum.—p. 156. 
Fig. 160. MELANIA PERPINGUIS, lateral view of the shell, with 
the animal; 160 a, lateral view of a young specimen, with the 
animal; 1600, ventral view of the shell; 160 c, a young shell, 
dorsal view.—p. 142. 
Fig. 161. MELANIA CORPOROSA, lateral view of the shell, in out- 
line, with the animal; 161 a, view of the shell and animal, from 
beneath.—p. 137. 
Fig. 162. MELANIA FURFUROSA, ventral view of the shell; 162 
a, dorsal view of the shell.—p. 139. 
Fig. 163. MELANIA BULBOSA, ventral view of the shell; 163 a, 
dorsal view of the shell. —p. 142. 
Fig. 164. MELANIA SILICULA, ventral view of the shell; 164 a, 
dorsal view of the shell.—p. 141. 
Fig. 165. MELANIA PLICIFERA, ventral view of a variety from 
Lake George, Oregon.—p. 143. 
Fig. 166. Cerrrmum (Potamis) SACRATUM, ventral view of the 
shell; 166 a, dorsal view of the shell.—p. 144. 
Fig. 167. CERITHIUM ADUNCUM, ventral view of the shell, 167 a, 
dorsal, and 167 b, profile views of the shell.—p. 147. 
Fig. 168. CERITHIUM IRRORATUM, ventral view of the shell; 168 
a, profile view of the shell.—p. 148. 
Fig. 169. CERITHIUM INVAGINATUM, ventral view of the shell; 
169 a, dorsal view of the shell, 169 2, details of sculpture, magni- 
fied.—p. 146. : i 
Fig. 170. CERITHIUM SORDIDULUM, ventral aspect of the shell, en- 
larged; 170 a, dorsal view of the shell, enlarged; 170 b, details of 
sculpture, magnified ; 170 c, natural size.—p. 145. 
Fig. 171. CERITHIUM EGENUM, ventral view of the shell, en- 
larged; 171 a, the shell, natural size; 171 2, details of sculpture, 
magnified.—p. 151. 
Fig. 172. CERITHIUM PUSILLUM, ventral view of the shell, en- 
larged, 172 a, dorsal view ; 172 b, natural size.—p. 150. 
Fig. 173. CERITHIUM JANTHINUM, ventral view of the shell, en- 
larged; 173 a, natural size; 173 b, details of sculpture, magnified. 
—p. 152. 
