CHITON. 
Prats IX. 
Species 47. (Mus. Cuming.) 
CHITON SPICULOSA. 
semilunaribus, undique rugosis ; nigricante-fuscd, liga- 
mento corneo, spiculorum vitreorum cristis densis vivide 
olivaceis munito. 
THE sPIcuLOUS CHIToN. Shell somewhat elongately 
ovate, valves semilunar, rough throughout; blackish 
brown; ligament horny, furnished with thick tufts 
of bright olive glassy spicule. 
Hab. West Indies. 
T am not aware that this beautiful species has been des- 
cribed; the dense tufts of spiculee with which it is sur- 
rounded at the junction of the valves look like silk or spun 
glass. 
Chit. testé subelongato-ovatd, valvis 
Species 48. (Fig. a, and 4. Mus. Cuming.) 
CHITON SETIGER. Chit. testd ovatd, valvd anticd terminali 
radiatim carinatd, carinis subdistantibus, posticd umbo- 
natd, ceterarum areis lateralibus levibus aut transver- 
sim granulatis, margine anticd carinatd, centralibus aut 
levibus aut oblique granoso-rugulatis, presertim versus 
latera; rubescente, interdum flavidad, maculis nigris 
longitudinalibus varie pictd ; ligamento corneo, setis 
longiusculis palantibus irregularibus dense obsito. 
THE BRISTLY CurTron. Shell ovate, anterior terminal 
valve radiately keeled, keels rather distant, the pos- 
terior umbonated, lateral areas of the rest smooth or 
transversely granulated, anterior margin keeled, cen- 
tral areas either smooth or obliquely granosely 
wrinkled, especially towards the side; reddish, some- 
times yellowish, variously painted with longitudinal 
black blotches ; igament horny, densely beset with 
rather long irregular strageling bristles. 
Kine, Zool. Journal, vol. v. p. 338. 
Hab, Tierva del Fuego and Strait of Magalhaens ; King. 
Variety 8. (Fig. 48. 6.) 
Testa viridis, maculis nigris sepé undulatis, setis brevioribus 
numerosioribus. 
Shell green, black spots often waved, bristles shorter and 
more numerous. 
Chiton Fremblii, Broderip. 
An eadem? Chiton biramosus, Quoy. 
Hab. Valparaiso, Chili (found on one exposed rock only 
covered by a small sea-weed); Cuming. 
These are very characteristic varieties, and evidently 
states of the same species; the sides of the valves are 
angled and appressed, and there is a peculiarity in the irre- 
guar straggling bristles, which beset the ligament. 
Species 49. (Mus. Cuming.) 
CHITON ACULEATUS. Chit. testd subelongato-ovatd, valvis 
terminalibus, posticéd wmbonatd, caterarum areisque 
lateralibus, granorum radiis irregularibus subdistanti- 
bus ornatis, granis solitariis, centralibus medio levibus, 
utringue densé oblique rugatis ; piceo-fuscd ; ligamento 
corneo, spinis numerosis, longitudine et crassitudine 
variantibus, obsito. 
THE PRICKLY CurTon. Shell somewhat elongately ovate, 
terminal valves, the posterior wmbonated, and the 
lateral areas of the rest ornamented with rather dis- 
tant irregular rays of solitary granules, central areas 
smooth in the middle, densely obliquely wrinkled on 
each side; pitch-brown, ligament horny, beset with 
numerous spines varying in length and thickness. 
Lixnaus, Syst. Nat. (12th edit.) pl. 1106. 
Chiton tuberculiferus, Sowerby. 
Chiton spiniferus, Frembly. 
Hab. Chili (on exposed rocks); Frembly, Cuming. 
There appears to me very little doubt but that the 
C. spiniferus of Frembly, though published as a distinct 
species by M. Deshayes in his new edition of Lamarck, is 
the old Linnzean C. aculeatus in fine conditon. 
It is an abundant species and inhabits very exposed 
situations on rocks assailed by the constant buffetings of 
the waves; the shell is consequently very difficult to pro- 
cure with its sculpture fairly developed. A figure of this 
species in Chemnitz, Conch. Cab. v. 10. pl. 173. f. 1692, 
is evidently drawn from a specimen mostly deprived of 
spines, with the surface of the valves, as is very com- 
monly the case, completely eroded; the figure in the 
Encyclopédie Méthodique is merely a copy of this, so that 
no authentic illustration of the species appeared, in its 
natural condition, until the publication of Mr. Frembly’s 
figure in the Zoological Jounal under the name C. spini- 
Serus. 
Species 50. (Mus. Cuming.) 
Curron Peruvianus. Chit. testé ovata, valvis undigue 
February, 1847. 
