CHITON. 
Prats XXII. 
(Specimens moderately magnified.) 
Species 143. (Mus. Cuming.) 
Garton Sincnarri. Chit. testé ovati, valvis terminalibus 
ceterarum areisque lateralibus granis amplis depressius- 
culis conspicue radiatis, centralibus medio levibus, 
utringue corrugato-striatis ; ligamento squamato-cori- 
aceo ; olivaceo-viridi, albi-lentiginosé. 
Sinciarr’s Curtron. Shell ovate, terminal valves and 
lateral areas of the rest conspicuously rayed with large 
rather depressed grains, central areas smooth in the 
middle, wrinkled on each side; ligament squamately 
coriaceous ; olive-green, speckled with white. 
Gray, Spicilegia Zoologica. 
Hab. Van Dieman’s Land; Dr. Sinclair R.N. 
Very closely allied to the C. Capensis and pellis-serpentis, 
but distinguished from both by the peculiar structure of 
the granules, which, to use a mournful comparison, have 
an appearance like the nails on a coffin. 
Species 144. (Fig. a and 6. Mus. Brit.) 
Curton stRiouatus. Chit. oblongo-ovatd, valvis medio 
levibus, aut, sub lente, minutissimé reticulatis, latera 
versus concentricé undulato-striatis ; viridescente aut 
rosacea ; ligamento squamato-coriaceo, squamis parvis, 
sub lente minutissime striolatis. 
THE FINELY STRIATED Cuiron. Shell oblong-ovate, 
valves smooth, or, under the lens, very minutely 
reticulated, in the middle, concentrically undulately 
striated towards the sides; greenish or pinkish ; liga- 
ment squamately coriaceous, scales small, very mi- 
nutely striated under the lens. 
Gray, Spicilegia Zoologica. 
Hab. Rio de Janeiro. 
The fine transverse striae which characterize the scales 
of the ligament, are only to be discerned with the aid of a 
powerful lens. 
Species 145. (Mus. Brit.) 
CHITON castus. Chit. testé oblongo-ovatd, undique con- 
spicué granulatis, granulis solitariis, arearum centra- 
lium seriatim longitudinaliter ordinatis, lateralium pro- 
miscuis; subrosaced et lutescente ; ligamento corneo, 
setigero. 
Tue cHAsTE Curron. Shell oblong-ovate, conspicuously 
granulated throughout, granules solitary, arranged on 
the central areas in longitudinal rows, on the lateral 
areas promiscuously; pinkish and yellowish; liga- 
ment horny, bristly. 
Hab. P 
A very delicate and neatly sculptured species, distin- 
guished by the character and arrangement of the granules. 
Species 146. (Mus. Brit.) 
CHITON cRocINUs. Chit. testd ovatd, valvis terminalibus 
ceterarum areisque lateralibus rugis undulatis concen- 
tricé exculptis, superficie minutissime puncturatd, cen- 
tralibus liris minutis obliquis undulato-decussatis ; cro- 
cing, medio purpurascente tinctéd ; ligamento corneo, 
tessellato. 
THE SAFFRON Curton. Shell ovate, terminal valves and 
lateral areas of the rest concentrically sculptured with 
waved wrinkles, the surface being most minutely 
punctured, central areas undulately decussated with 
minute ridges; saffron yellow, stained in the middle 
with light purple; ligament horny, tessellated. 
Hab. ——? 
A species most peculiar in colour, and not less in sculp- 
ture; the surface of the central areas having the appearance 
of coarse cloth or canvas. 
Species 147. (Mus. Brit.) 
CHITON ILLUMINATUS. Chit. testa ovatd, valvis terminali- 
bus ceterarum areisque lateralibus minute granoso- 
scabris, centralibus subtilissimé liratis, liris subgranu- 
latis, interstitiis excavatis, minutissimé reticulatis ; 
ligamento corneo, arenaceo; undique rufi, ligdamento 
maculis albis ornato. 
THE ILLUMINATED CHITON. Shell ovate, terminal valves 
and lateral areas of the rest minutely granosely rough, 
central areas very finely ridged, ridges slightly gra- 
nulated, interstices hollow and very minutely reticu- 
lated; ligament horny, arenaceous; red throughout, 
ligament marked with white spots. 
Hab. Straits of Magalhaens. 
The shell and ligament are all of an uniform red colour, 
May, 1847. 
