CHITON.—PuatEe XXVII. 
terminal valve retusely umbonated, lateral areas 
scarcely distinguished ; greenish-black, valves longi- 
tudinally painted in the middle with a brown band ; 
ligament horny. 
Hab. Australia, on the rocks; Cunningham. 
This fine shell which I at first thought to be a variety 
of the C. piceus, is certainly distinct from that species ; on 
comparing the descriptions and figures the valves may be 
observed to differ both in form and sculpture. 
Tt was collected in Australia by the late Mr. Allan 
Cunningham, a most indefatigable traveller, who has 
contributed largely to our stores both of zoological and 
botanical specimens, and I gladly adopt his name already 
attached to the specimen in manuscript. 
Species 90. (Mus. Cuming.) 
CHITON sPINULOSUS. Chit. testé ovata, valvis granulorum 
liris eximiis undique-nitidé eaculptis, terminali posticad 
umbonata ; fulvo-spadiced, macula trigond rufa sum- 
mitate umbonali utriusque valve, valvarum marginibus 
posticis rufo alboque pulcherrimé articulatis ; liga- 
mento corneo, subarenaceo. 
THE SPINULOSE Cuiton. Shell ovate, valves neatly sculp- 
tured throughout with delicate ridges of granules, 
posterior terminal valve umbonated; fulvous bay 
colour, with a triangular dark red spot on the umbo- 
nal summit of each valve, posterior edges of the 
valves very prettily articulated red and white ; liga- 
ment horny, subarenaceous. 
Sowersy, Conch. Illus. f. 84 and 84 @, (not f. 70 and 71). 
Hab. 2 
Well characterized by its neatly defined rows of delicate 
granules and peculiar style of painting. 
Species 182. (Fig. 182 and 183, Mus. Cuming.) 
CHITON MARGINATUS. Chit. test@ ovatd, latiusculd, sub 
lente undique minutissimé reticulatd, areis lateralibus 
vie distinctis, valvarum marginibus posticis obsolete 
minute denticulatis ; albidd, nigro aut viridi promiscué 
variegaté ; ligamento arenaceo, tessellato. 
THE MARGINED CurTon. Shell ovate, rather broad, 
under the lens very minutely reticulated, lateral areas 
scarcely distinguished, posterior edges of the valves 
obsoletely minutely denticulated; whitish, promis- 
cuously variegated with black or green; ligament 
arenaceous, tessellated. 
Pennant, Brit. Zool. vol. iv. p. 71. pl. 36. f. 2. 
Hab. Britian. 
The commonest and most variable of the British species. 
Figure 154. 
Probably a variety only of C. ongicymba. 
