CHITON.—Ptatr XXI. 
ovate to somewhat elongately ovate; it is characterized by 
a particularly neat style of sculpture. 
Species 141. (Mus. Cuming.) 
CHITON cImMoLIus. Chit. testi oblongo-ovatd, valvis termi- 
nalibus ceterarum areisque lateralibus radiatim gra- 
natis, granis solitarius, subirregularibus, peculiariter 
decumbentibus, valudé anticé terminali umbonem versus 
retrorsum inflexd, posticdé conspicue wmbonata, areis 
centralibus medio levibus, utringue liratis, liris tenui- 
bus, viv granulatis subdistantibus interstitis excavatis ; 
lutescente-fusca ; ligamento squamato-coriaceo, tessel- 
lato. 
THE FULLER’S-EARTH Curron. Shell oblong-ovate, ter- 
minal valves and lateral areas of the rest radiately 
grained, grains solitary, somewhat irregular, pecu- 
liarly decumbent, anterior terminal valve reflected 
back towards the umbo, posterior conspicuously um- 
bonated, central areas smooth in the middle, ridged 
on each side, ridges thin, scarcely granulated, rather 
distant, interstices hollowed ; yellowish-brown ; liga- 
ment squamately coriaceous, tessellated. 
Hab. Australia. 
Allied in form, but not in sculpture, to the C. volvoz ; 
ata loss for a name, I have distinguished its resemblance 
in colour to the common fuller’s clay. 
Species 142. (Mus. Brit.) 
Curton Nova#-Hottanpia. Chit. testé oblongo-ovatd, 
valvis terminalibus ceterarum areisque lateralibus ob- 
scuré radiatim verrucoso-liratis et concentricé irregu- 
lariter sulcatis, areis centralibus levibus, aut, sub lente, 
minutissime reticulatis; viridi, olivaceo maculatéd ; 
ligamento granoso-coriaceo, nigricante. 
Tue New Hottanp Curron. Shell oblong-ovate, ter- 
minal valves and lateral areas of the rest obscurely 
radiately verrucosely ridged and concentrically irre- 
gularly grooved, central areas smooth, or, under the 
lens, very minutely reticulated ; green, blotched with 
olive; ligament granosely coriaceous, blackish. 
Gray, MSS. British Museum. 
Hab. New Holland. 
The general aspect of this shell is not much unlike that 
of the C. australis, from the same locality; it is, however, 
amply distinguished by its smooth central areas, the ob- 
scurely wart-like character of the radiating ridges of the 
lateral areas and its olive-blotched style of painting. 
