ar 
MOLLUSCA AND SHELLS. 
6 
128 a, side of the last whorl, enlarged; 128 b, natural size.—P- 
t11. 
Fig. 130. PLANORBIS CORPULENTUS, sid 
130 a, the locomotive disk of the a 
e view of the shell, with 
nimal; 130 8, the 
the animal ; 
head, in outline.—p. 113. 
Fig. 131. PLANORBIS VERMICULARIS, enlarged view of the shell, 
from above; 131 a, the same, from beneath; 131 4, the same, in 
front; 151 ¢, natural size.—p. 112. . : 
Fig. 132. PLANORBIS OPERCULARIS, enlarged view of the shell, 
he same, in front; 132 0, the same, from 
from above; 132 a, the ; 
beneath ; 132 ¢, natural size.—p. $15. 
Fig. 133. PLANORBIS KERMATOIDES, outline of the shell, with the 
animal.—p. 114. 
Fig. 134. PuysA VENUSTULA, shell, with the anim 
134 a, lateral view of the shell and animal, enlarged ; 
al, from be- 
neath ; 
134 b, natural size.—p. 11o. 
Fig. 135.—PuHysa RIVALIS, shell, in outline, with the animal.— 
120. 
: Fig. 186. Puysa TraBuLara, front view of the shell; 136 a, late- 
ral view of the animal and shell; 136 4, shell, w ith the animal, 
seen from beneath.—p. 116. 
Vig. 137. Puysa crpsosa, lateral view of the shell, with the 
animal; 137 a, front view of the shell.—p. 117%, 
PLATE 9. 
Fig. 138. Paysa vireinea, ventral view of the shell; 138 a, 
dorsal view of the shell.—p. 120. 
Fig. 189. Puysa sinuata, ventral view of the shell; 139 a, 
profile view of the shell_—p. 118. 
Fig. 140. Puysa RETICULATA, an elongated specimen, ventral 
view; 140 a, dorsal view of the same; 140 4, dorsal view of a 
short specimen.—p. 118. 
Fig. 141. Liwnea Lepipa, ventral view of the shell; 141 a, dor- 
sal view of the shell—p. 121. 
Fig. 142. Linnea voturata, ventral view of the shell, enlarged; 
p. 122. 
Fig. 143. Dompeya opovara, ventral view of the shell; 143 a, 
dorsal view of the shell.—p. 124. 
Fig. 144. Domprya FLuminea, lateral view of the shell and 
animal; 144 a, ventral view of the shell and animal.—p. 124. 
Fig. 145. Domprya rascrata, ventral view of the shell; 145 a, 
dorsal view of the shell—p. 123. 
142 a, dorsal view of the same; 142 4, natural size. 
Fig. 146. MELANopsiIs zELANDICA, lateral view of the shell, with 
the animal; 146 a, ventral view of the same; 146 0, aperture of 
the shell—p. 180. 
Fig. 147, AmMpuLLARIA COLUMELLARIS, ventral view of the shell ; 
147 a, dorsal view of the shell. —p. 126. 
Fig. 148. AmNicoLA ANTIPODARUM, 
Fig. 149. AmnicoLa coroLia, the animal, enlarged, as seen from 
below; 149 a, lateral view of the animal, with the shell, e 
149 4, ventral view of the shell, enlar ged; 149 c, 
p. 129. 
Fig. 150. AmNicoua BADIA, ventral view of the shell, enl 
150 a, dorsal view of the shell, enlarged; 150 b, natur 
p. 126. 
nlarged ; 
natural size,— 
arged 
al size,— 
Fig. 151. Amnicona GRACILIS, ventral view 
151 a, dorsal view of the shell, enl 
p. 127 
Fig. 152. Crneuta PETENINGENSIS, ventr 
enlarged; 152 a, dorsal y 
size.—p. 180. 
of the shell, enlarged ; 
arged; 151 6, natural size.— 
al view of the shell, 
iew of the shell, enlarged ; 
152 6, natural | 
Fig. 153. MELANIA TETRICA, ventral view of the shell; 153 a, 
dorsal view of the shell; 153 6, outline figure of an unarmed 
specimen.—p. 133. 
Fig. 154. MELANIA CYBELE, ventral view of the shell; 154 a, 
dorsal view of the shell; 154 6, lateral view of the animal; 154 ¢, 
the operculum, outer and inner surface.—p. 152 
Fig. 155. MErLANIA TERPSICHORE, ventral view of the shell; 155 
: abies SEs r a ry 
a, ventral view of the shell; 1556, figure of a young specimen,— 
| p. 133. 
ce} 
Fig. 156. MELANIA SCIPIO, lateral view of the animal and shel]: 
d 
156 a, locomotive disk of the animal; 156 0, lateral view of a 
young specimen, with the animal, to show the velvet; 156 c, 
young shell, to show the coloring ; 156 d, profile view of the aper- 
ture; 156 @, the operculum, outer and inner surface.—p, 13 
PLAT iy £0. 
Fig. 157. MELANIA VAINAFA, lateral view of the shell, with the 
animal; 157 a, view of the shell, with the animal, from beneath ; 
157 5, the operculum.—p. 138 
Fig. 158. MELANIA sciTuLA, ventral, 158 a, dorsal, and 158 b, 
profile views of the shell.—p. 140. 
Fig. 159. Meianra LuTosA, lateral view of the shell, with the 
animal; 159 a, the animal, seen from beneath; 159 0, profile of 
the aperture, in outline; 159 c, the operculum.—p. 136. 
Fig. 160. MELANIA PERPINGUIS, lateral view of the shell, with 
the animal; 160 a, lateral view of a young specimen, with the 
animal; 160 6, ventral view of the shell; 160 ¢, a young shell, 
dorsal view.—p. 142. 
Fig. 161. MeLanra 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. MrLANnraA 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. Creritarum (Potamis) sacratum, ventral view of the 
shell; 166 a, dorsal view of the shell.—p. 144. 
Hig, 167. Ceriratum ApUNCUM, ventral view of the shell; 1674, 
dorsal, and 167 4, profile views of the shell.—p. 147. 
Fig. 168. Ceriraium rrrorAtum, ventral view of the shell; 168 
a, profile view of the shell.—p. 148. 
Fig. 169. Crriruium invAGINATUM, ventral view of the shell; 
169 a, dorsal view of the shell; 169 2, details of sculpture, mag- 
nified.—p. 146. 
Fig. 170. Ceriraium sorpipuLum, ventral aspect of the shell, 
enlarged ; 170 a, dorsal view of the shell, enlarged ; 170 4, details 
of sculpture, magnified; 170 ¢, natural size.—p. 145. 
\o A. | . . 
Fig. 171. Crrtraium rcEenum, ventral view of the shell, en- 
| larged; 171 a, the shell, natural size; 171 , details of sculpture, 
| magnified.—p. 151. 
Fig. 172. Ceriraivm pusitium, ventral view of the shell, en- 
larged; 172 a, dorsal view; 172 4, natural size.—p. 150. 
Fig. 173. Crriraium JANTHINUM, ventral view of the shell, en- 
larged; 173 a, natural size ; 173 6, details of sculpture, magni- 
fied.—p. 152 
