CHITON. 
Puate XXIII, 
(Specimens moderately magnified.) 
Species 152. (Mus. Brit.) 
CHITON CANCELLATUS. Chit. testé oblongo-ovatd, valvis 
terminalibus ceterarum areisque lateralibus creberrimé 
granulatis, posticé terminali conspicue umbonatd, areis 
centralibus longitudinaliter minute sulcatis, sulcis latera 
versus subprofundis ; albicante ; ligamento corneo are- 
naceo. 
THE CANCELLATED CHITON. Shell oblong-ovate, terminal 
valves and lateral areas of the rest very closely granu- 
lated, posterior terminal valve conspicuously umbo- 
nated, central areas longitudinally minutely grooved, 
with the interstices cancellated, grooves rather deep 
towards the sides; whitish; ligament horny, arena- 
ceous. 
Leacu? Sowerby, Conch. Illus. f. 104. @ and 6. 
Hab. Coast of Scotland. 
This shell, with the aid of a good lens, will be found to 
have a very neat arrangement of sculpture, the central areas 
being curved with finely cancellated grooves, whilst the 
lateral are crowded with minute granules. It is perfectly 
distinct from the white variety of C. cinereus which has 
been confounded with it. 
Species 153. (Mus. Brit.) 
CHITON PULCHELLUS. Chit. testd ovatd, valvis terminali- 
bus radiatim nodoso-costatis, costis amplis areis latera- 
libus bicostatis, centralibus peculiariter minute foveo- 
latis ; ligamento corneo ; undique luteo-albidd. 
THE PRETTY CHITON. Shell ovate, terminal valves radi- 
ately nodosely ribbed, ribs large, lateral areas two- 
ribbed, central areas peculiarly minutely pitted ; liga- 
ment horny; yellowish white throughout. 
Gray, Spicilegia Zoologica. 
Hab. Arica, Peru; Rev. W. V. Hennah. 
The central areas of this pretty species are distinguished 
by a peculiarly indented or honey-comb style of sculpture. 
Species 154. (Mus. Brit.) 
CHITON INauINATUS. Chit. testd oblongo-ovaté, valvis 
terminalibus ceterarum areisque lateralibus concentricé 
subobscureé costatis, tenué radiatim sulcatis, areis cen- 
tralibus longitudinaliter tenuiliratis ; ligamento corneo, 
arenaceo ; albidd, macula fuscescente per summitatem 
umbonalem utriusque valve tinctd. 
THE SOILED Cuiton. Shell oblong-ovate, terminal valves 
and lateral areas of the rest concentrically somewhat 
obscurely ribbed, finely radiately grooved, central 
areas longitudinally finely ridged; ligament horny, 
arenaceous ; whitish, stained with a light brown spot 
along the summit of each valve. 
"Hab. Van Dieman’s Land; Dr. Sinclair. 
This shell is sometimes partially stained throughout 
with the faint brown colour which appears on the umbonal 
summit. 
Species 155. (Mus. Brit.) 
CHITON SEGMENTATUS. Chit. testd suboblongo-ovatd, valvis 
terminalibus ceterarum areisque lateralibus nodis gran- 
dibus solitariis radiatim ordinatis pulcherrimé celatis, 
areis centralibus longitudinaliter tenuiliratis, liris an- 
gustis, subgranulatis, interstitiis excavatis ; ligamento 
corneo, granoso-coriaceo ; albicante, lateribus rufescen- 
tibus, maculé albé, fusco-marginaté, per summitatem 
utviusque valve. 
THE EMBROIDERED CuirTon. Shell somewhat oblong ovate, 
terminal valves and lateral areas of the rest very beau- 
tifully carved with rays of large isolated nodules, cen- 
tral areas longitudinally finely ridged, ridges narrow, 
slightly granulated, interstices hollowed; ligament 
horny, granosely coriaceous; whitish, sides reddish, 
with a brown-edged white spot along the summit of 
each valve, 
9 
Hab. 
A truly interesting species, amply distinguished from 
any other. 
Fig. 156. (Mus. Gray.) 
CuIton MiLLERI. Chit. testd ovatd, levigatd, areis cen- 
tralibus, sub lente, minutissimé reticulatis, lateralibus 
tenuissimé striatis ; olivaced vel interdum albd, nigro 
maculaté aut punctatéd ; ligamento granoso-coriaceo, 
nigro luteoque tessellato. 
May, 1847. 
