CHITON.—Ptate XXIII. 
Mituer’s Curron. Shell ovate, smooth, central areas, 
under the lens, most minutely reticulated, lateral 
areas very finely striated; olive or sometimes white, 
blotched and dotted with black; ligament granosely 
coriaceous, tessellated with black and yellow. 
Gray, Spicilegia Zoologica. 
Hab. Hastern Seas. 
Extremely variable in colour, as may be seen in the 
further varieties figured in Pl. XXIV. 
Species 157. (Mus. Gray.) 
Curton Mupiterranevs. Chit. testd oblongo-ovatd, valvis 
terminalibus ceterarum areisque lateralibus concentrice 
undulato-scabris, centralibus longitudinaliter sulcatis ; 
albicante ; ligamento granoso-coriaceo, fuscescente. 
Tur MepITerRaNnzaN Curton. Shell oblong-ovate, ter- 
minal valves and lateral areas of the rest undu- 
lately scabrous, central areas longitudinally grooved ; 
whitish ; ligament granosely coriaceous, pale brown. 
Gray, MSS. (private cabinet). 
Hab. Mediterranean. 
In order not to confound this shell with the C. Rissoz, 
it may be observed that the lateral areas. in that species 
are granulated. 
The central figure, without number, represents the young 
of C. Hennahi. 
Species 158. (Mus. Brit.) 
CHITON CARINULATUS. Chit. testd oblongo-ovatd, valvis 
terminalibus ceterarum areisque lateralibus concentricé 
et radiatim subobscuré liratis, granulis obtusis corru- 
gato-ordinatis creberrimeé exculptis, areis centralibus 
quoque granulatis, medio levibus, summitate peculiariter 
carinatis ; rubicundd ; ligamento subtiliter squamato- 
coriaceo. 
THE FINELY KEELED Curton. Shell oblong-ovate, ter- 
minal valves and lateral areas of the rest concentrically 
and radiately somewhat obscurely ridged, and sculp- 
tured with obtuse granules arranged in wrinkles, 
central areas also granulated, smooth in the middle, 
peculiarly keeled at the summit; ruddy rose; liga- 
ment finely squamately coriaceous. 
Hab. Van Dieman’s Land; Dr. Sinclair, R.N.° 
An extremely interesting species keeled in a peculiar 
manner along the umbonal summit. 
Species 159. (Mus. Cuming.) 
CHITON caTILLus. Chit. testd ovatd, anticé attenuaté, 
valvis terminalibus ceterarum areisque lateralibus con- 
centricé liratis, granulis minutis radiatis, centralibus 
subtilissimé sulcatis et cancellatis ; albidd ; ligamento 
corneo, arenaceo. 
Tue pisH Curton. Shell ovate, attenuated anteriorly, 
terminal valves and lateral areas of the rest concen- 
trically ridged, radiated with minute granules, central 
areas very finely grooved and cancellated; whitish, 
ligament horny, arenaceous. 
Hab. > 
Distinguished by its anteriorly attenuated form, and 
general arrangement of sculpture. } 
Species 160. (Mus. Gray.) 
CHITON CINGILLATUS. Chit. testd ovati, valvis levibus, 
liris duabus tribusve concentricis prope marginem cir- 
cumdaté ; olivaceé ; ligamento granoso-coriaceo. 
THE GIRDLED CuITOoN. Shell ovate, valves smooth, sur- 
rounded near the margin with two or three concentric 
ridges; olive; ligament granosely coriaceous. 
Hab. South America; Capt. Forbes Young. 
The ridges at the end of the lateral areas form rows of 
concentric circles round the shell which are very charac- 
| teristic. 
