CHITON. 
Prater VIII. 
Species 40. (Fig. a and 4, Mus. Cuming.) 
Curron ELoNGATUS. Chit. testd elongatd, valde angusta, 
valva terminali anticd octofariam carinata, interstitis 
inter carinas alternatim oblique sulcatis posticd ad 
eatremitatem umbonata, valvis ceteris creberrime tenui- 
sulcatis, areis centralibus sulcis longitudinalibus, late- 
ralibus antice carinatis, sulcis obliquis ; cinered aut 
purpureo-fuscd, carinis albo fuscoque undique articu- 
latis; ligamento lato, corneo, scabro, setis brevibus 
minutis obsito, postice fissurato. 
THE ELONGATED Curron. Shell elongated, very narrow, 
anterior terminal valve eight-keeled, interstices be- 
tween the keels alternately obliquely grooved, poste- 
rior umbonated to the extremity, the rest of the valves 
very closely finely grooved, central areas with the 
grooves longitudinal, lateral areas, keeled along the 
front, with the grooves oblique; ash or purple-brown, 
keels articulated throughout with white and brown; 
ligament broad, horny, rough, beset with very minute 
short bristles, slit at the posterior end. 
Hab. Raines’ Island, Torres Straits, New Holland; Ince. 
An interesting new species allied to the C. alatus, but of 
more diminutive proportions, with the valves more square. 
Species 41. (Mus. Cuming.) 
CHITON vioLAcnus. Chit. testd subelongatd, valvis sub- 
cordiformibus, planiusculis, medio acutis, undique sub- 
tiliter et creberrime granulatis ; intens® purpureo-rufa ; 
ligamento lato, corneo, fasciculis subtilissimis albidis 
vitreis utrinque valvas munito. 
THE VIOLET Cuiron. Shell somewhat elongated, valves 
nearly cordiform, rather flattened, sharp in the middle, 
finely and very closely granulated throughout ; intense 
purple-red; ligament broad, horny, with nine very 
fine brittle whitish fascicles on either side of the 
valves. 
Quoy and Garmarp, Voy. de l’Astrolabe, vol. iii. p. 403. 
pl. 73. £.15 to 20. 
Hab. New Zealand; Quoy and Gaimard. 
The fascicles or tufts of glassy fibres appear so extremely 
brittle as to be difficult to preserve. 
Species 42. (Fig. @ and 4, Mus. Cuming.) 
CHITON LIMACIFoRMIS. Chit. testd elongato-ovatd, valvis 
convewis, terminalibus peculiariter concentrice granu- 
latis, ceteris undique tenuissimé longitudinaliter sul- 
catis ; viridi alboque multifariam variegatd ; ligamento 
corneo, arenaceo. 
THE sLUG-sHAPED CuTon. Sholl elongately ovate, 
valves convex, terminal valves peculiarly concentri- 
cally granulated, the rest very finely longitudinally 
grooved throughout; multifariously variegated with 
green and white; ligament horny, arenaceous. 
SoweErsy, Pro. Zool. Soc., 1832, p. 26. 
Hab. Inner Lobos Island, Peru, and Guacamayo, Central 
America (under stones at low water); Cuming. 
The terminal valves of this species have a peculiar con- 
centric arrangement of the sculpture; the green and white 
appear in greater or less proportion in different specimens ; 
the ligament stripped of its arenaceous covering, as in 
fig. 4, is perfectly transparent. 
Species 43. (Mus. Cuming.) 
Cuiton iNctsus. Chit. testd vald? elongata, angustd, valvis 
oblongo-clypeiformibus, anticd terminali sexfariam cari- 
natd, carinis radiantibus, interstitiis alternatim oblique 
sulcatis, ceteris, posticd ad extremitatem umbonatd, 
longitudinaliter tenuisulcatis ; cinered aut viridescente, 
olivaceo-viridi variegaté et marmoratd; ligamento 
tenui corneo scabro, setis brevissimis obsito, utringue 
latissimé producto, postice fissurato. 
Tue cur Curron. Shell considerably elongated, narrow, 
valves oblong-shield-shaped, anterior terminal valve 
six-keeled, keels radiating, interstices alternately ob- 
liquely grooved, the rest of the valves, anterior ter- 
minal umbonated to the extremity, longitudinally 
finely grooved ; pale ash or greenish, variegated and 
marbled with olive green ; ligament thin, horny, rough, 
beset with very short bristles, very widely produced 
on either side, slit at the posterior end. 
Sowersy, Pro. Zool. Soc., 1841, p. 61. 
Hab. Daleguete, Island of Zebu, Philippines (under stones 
at low water); Cuming. 
Chiefly remarkable on account of the thin widely ex- 
panded growth of the ligament, and its posterior slit. 
February, 1847, 
