CHITON. 
Puate XXV. 
Species 166. (Mus. Cuming.) 
Curron HAsTatus. Chit. testd lanceolato-ovatd, valvit 
posticé terminali peculiariter acuminata, valvis sum- 
mitate levibus, utrinque minute granoso-scabris ; cinereo- 
albidd, medio nigricante ; ligamento corneo, fasciculis 
parvis munito. 
THE spEaRED Curron. Shell lanceolately ovate, pos- 
terior terminal valve peculiarly acuminated, valves 
smooth at the summit, minutely granulously roughened 
on each side; ashy white, blackish in the middle; 
ligament horny, furnished with small fasciculi. 
Sowrrsy, Conch. Illus. f. 127. 
Hab. ——? 
The acuminated growth of the valves constitutes a re- 
markable feature in this species ; in sculpture it approaches 
the C. hirudiniformis. 
Species 167. (Mus. Cuming.) 
Cuiton Luzonicus. Chit. testéd ovata, valvis terminalibus 
ceterarum areisque lateralibus radiatim granulato- 
liratis, centralibus longitudinaliter liratis, liris subdis- 
tantibus ; albidd, viridi longitudinaliter fammatd ; lig- 
amento corned. 
THE Luzon Cuiton. Shell ovate, terminal valves and 
lateral areas of the rest radiately granulously ridged, 
central areas longitudinally ridged, ridges rather 
distant; whitish, longitudinally flamed with green ; 
ligament horny. 
Sowerby, Pro. Zool. Soc. 1841. 
Hab. Sorsogon, Island of Luzon, Philippines (found at- 
tached to dead shells at the depth of fifteen fathoms) ; 
Cuming. 
Apparently distinct, though it has the appearance of 
being an immature shell. 
Fig. 168. (Mus. Cuming.) 
This appears to be identical with Mr. Gray’s C. pul- 
chellus. 
For Sp. 168. see Pl. XX VII. 
Species 169. (Mus. Cuming.) 
CHITON ANTIQUUS. Chit. testd oblongo-ovatd, valvis ter- 
minalibus radiatim costatis, areis lateralibus bicostatis, 
costis grandibus, tumidis, subnodosis, areis centralibus 
longitudinaliter tenuiliratis, lirarum interstitiis minute 
clathratis ; olivaceo-viridi ; ligamento corneo, squamato- 
coriaceo. 
THE ANTIQUE CHITON. Shell oblong-ovate, terminal valves 
radiately ribbed, lateral areas two-ribbed, ribs large, 
swollen, subnodose, central areas longitudinally finely 
ridged, interstices between the ridges minutely lat- 
ticed; olive-green; ligament horny, squamately co- 
riaceous. 
Hab. Australia. 
In the specimen of this beautifully carved species here 
represented, the ligament is unfortunately denuded of its 
scales; it approaches the C. pudchellus but differs in the 
sculpture of the central areas. 
Species 170. (Mus. Cuming.) 
CHITON DIsSIMILIs. Chit. testé oblongo-ovatd, valvis 
terminalibus ceterarum areisque lateralibus levibus, 
areis centralibus longitudinaliter sulcatis, medio levibus ; 
rufo-fuscescente, alboque varid; ligamento granoso- 
coriaceo, tessellato. 
THE DISSIMILAR Carton. Shell oblong-ovate, terminal 
valves and lateral areas longitudinally grooved, smooth 
in the middle; variegated with reddish brown; liga- 
ment granosely coriaceous, tessellated. 
Hab. ? 
Approximating in some measure to the C. tulipa. 
Species 171. (Mus. Cuming.) 
Curton Casnranus. Chit. testd subelongtato-ovata, valvis 
terminalibus ceterarum areisque lateralibus concen- 
tricé costatis, costis grossis, areis centralibus longitu- 
dinaliter striatis ; opaceo-albd ; ligamento corneo. 
Tue Caserta Curron. Shell somewhat elongately ovate, 
terminal valves and lateral areas of the rest concen- 
trically ribbed, ribs stout, central areas longitudinally 
striated ; opake-white ; ligament horny. 
Port, Test. utr. Sicil. pl. 4. f. 1. 
Hab. Mediterranean. 
A solid shell remarkable for the bold concentric sculpture. 
of its terminal and lateral areas. 
May, 1847. 
