CHITON.—Prate IX. 
minute granoso-striatis, granis solitariis ; nigricante- 
viridi ; ligamento corneo, pilis aterrimis densissimé 
obsito, pilis quoque per interstitia valvarum intrudenti- 
bus. 
Tue Peruvian Curton. Shell ovate, valves minutely 
granosely striated throughout, grains solitary; blackish 
green ; ligament horny, very thickly beset with jet 
black hairs, with hairs also passing out through the 
interstices between the valves. 
Lamarck, Anim.sans. vert. (Deshayes’ edit.) vol.vii.p.491. 
Hab. Valparaiso, Chiloe, Iquiqui &c., Peru (under stones 
at low water, and attached to shells in sandy mud at 
a depth of about nine or ten fathoms) ; Cuming. 
Easily distinguished by its profuse display of harsh vege- 
table-fibre-like hair which both crowds the ligament and 
passes out through the interstices between the valves. 
Species 51. (Mus. Cuming.) 
Curron spinosus. Chit. testd subelongato-ovatd, valvis ter- 
minalibus caeterarum areisque lateralibus irregulariter 
granoso-rugosis, centralibus levibus ; purpureo-nigra, 
ligamento corneo, spinis solidis, erectis, aterrimis, lon- 
gitudine variantibus, armato. 
Tur spinous Cuiron. Shell somewhat elongately ovate, 
terminal valves, and lateral areas of the rest irregu- 
larly granosely roughened, central areas smooth; 
pwrple-black ; ligament horny, armed with jet black 
erect solid spines of various lengths. 
BrvuGurereE, Journ. d’Hist. Nat. vol. i. p. 25. pl. 2.f. 1, 2. 
Hab. New Holland. 
The spines of this fine species are quite peculiar; smooth 
and black as ebony, they are of a horn-like tubular struc- 
ture, filled up with hard brownish calcareous matter. 
Species 52. (Mus. Cuming.) 
CHITON BREVISPINOSUS. Chit. testd subabbreviato-ovata, 
valvis terminalibus, postica umbonatd, retusa, ceterarum 
areisque lateralibus concentricé granulatis centralibus, 
umbonibus peculiariter appressis, medio levibus, latera 
versus subtiliter granoso-rugulatis ; intense ceruleo- 
nigra ; Ugamento corneo, spinis solidis brevibus, ater- 
rimis, apice albis, densissimé armato. 
THE SHORT-SPINED CuIToN. Shell somewhat abbreviately 
ovate, terminal valves, the posterior umbonated and 
retuse, and lateral areas of the rest concentrically 
granulated, central areas, the umbones peculiarly ap- 
pressed, smooth in the middle, finely granosely 
wrinkled towards the sides ; intense blue-black ; liga- 
ment horny, very thickly armed with short solid 
spines, jet black but white at the top. 
SowErsy, Mag. Nat. Hist., 1840. Conch. Illus. f. 136. 
Hab. Island of Johanna, East Africa (under stones); 
Rey. W. V. Hennah. 
Though abundantly distinguished from the C. spinosus 
in the form and sculpture of the valves, the posterior of 
which is abruptly umbonated, this species is more remark- 
ably characterized by the spines being invariably white at 
the apex; they are shorter and more thickly crowded than 
in the preceeding species, and look exactly as if they had 
been singed at the top. 
