CHITON. 
Puare III. 
Species 12. (Mus. Cuming.) 
Cuiton Lyrxii. Chit. testd oblongo-ovatd, valvis sub- 
rotundatis, umbonibus rostratis, omnibus rugis tmpressis 
subtilibus oblique et concentricé decussatis ; valvis ad 
latera vivide viridibus, medio roseis, nigro per sum- 
mitatem umbonalem nitidé pictis; ligamento corneo, 
granoso-arenaceo, fusco-marmorato. 
Lyru’s Curron. Shell oblong-ovate, valves somewhat 
rounded, wmbones beaked, all obliquely and concen- 
trically decussated with fine impressed wrinkles ; 
valves bright green at the sides, rose pink in the 
middle and neatly painted with black along the um- 
bonal eminence; ligament horny, granosely arena- 
ceous, fawn colour, marbled with brown. 
SoweErsy, Pro. Zool. Soc., 1832. p. 26. 
Hab, Pitcairn’s Island, Polynesian Group (in small round 
hollows formed by Hchini in exposed situations at 
low-water mark); Cuming. 
This exquisite little species, named in honour of our 
celebrated geologist, is the gem of the genus; the colours 
are bright and brilliant, and disposed with adventitious 
beauty. 
Species 13. (Mus. Cuming.) 
Cuiton Buatnvitiit. Chit. testd suborbiculari-ovatd, 
valvis latissimis angustis, posticis parvis, terminali 
minima, valvd anticd terminali obscuré radiata, ceteris 
lavibus, concentricé lineatis, areis lateralibus concavo- 
impressis ; roseo, albo, fusco viridique varia ; ligamento 
corneo, setis brevibus hinc et hine remote munito, pos- 
tice contracto, anticé enormiter producto. 
BLAINVILLE’s Corton. Shell somewhat orbicularly ovate, 
valves very broad transversely, and narrow longitu- 
dinally, posterior small, the terminal very small, an- 
terior terminal valve obscurely rayed, the rest smooth, 
concentrically lineated, lateral areas concavely im- 
pressed; variegated with pink, white, brown, and 
green; ligament horny, remotely furnished here and 
there with short bristles, contracted posteriorly, enor- 
mously produced anteriorly. 
Broperip, Pro. Zool. Soc., 1832. p. 27. 
Hab. Toner Lobos Island, Peru (attached to a stone at 
the depth of seventeen fathoms); Cuming. 
This species, of which Mr. Cuming only collected a few 
examples, attached to one particular stone, at the above- 
named island, is chiefly remarkable on account of the 
extraordinary anterior extension of the ligament; extraor- 
dinary, because out of the vast amount of species forming 
the subject of this monograph, not one exhibits the least 
modification of such a condition. The shell is also re- 
markable, and widely distinct from any species hitherto 
discovered; together, they form a curious resemblance to 
the English coal-heavers’s cap. 
Species 14, (Mus. Cuming.) 
Cuiton CuiLonnsis. Chit. testd oblongo-oratd, valvis 
elevatiusculis, levibus aut concentricé striatis ; wmbo- 
nibus subrostratis ; lurido-viridi, medium versus pallidi- 
ore, fusco-nigricante pone umbones tinctd ; ligamento 
corneo, translucido. 
THe Curton Curron. Shell oblong-ovate, valves rather 
elevated, smooth or concentrically striated, umbones 
a little beaked; lurid green, paler towards the mid- 
dle, stained with a brown-black dash behind the 
umbones ; ligament horny, transparent. 
Sowerby, Pro. Zool. Soc., 1832, p. 58. 
Hab. Island of Chiloe, west coast of South America 
(under stones); Cuming. 
I cannot detect the punctured striee which Mr. Sowerby 
describes as characteristic of this species; it has been 
regarded a variety of the C. elegans, but may be readily 
distinguished by the more elevated and beaked structure 
of the valves, and absence of raised granules; there is also 
a pecularity in the colouring which does not accord with 
any of the multifarious varieties of painting which that 
species is known to exhibit. 
Species 15. (Mus. Cuming.) 
Curron suncatus. Chit. testé oblongo-ovatd, valvis om- 
nibus fortiter sulcatis, liris valvarum terminalium 
arearumque lateralium radiatim dispositis, hic illic 
irregulariter bifariam divergentibus, centralium longitu- 
dinalibus, wmbones versus leviter curvatis ; undique 
anthracind ; ligamento granoso-coriaceo, olivaceo-nigro. 
Tur GrooveD Curton. Shell oblong-ovate, all the 
valves strongly grooved, ridges of the terminal valves 
and of the lateral areas radiately disposed, here and 
there irregularly bifariously divergent, of the central 
areas longitudinal, slightly curved towards the wn- 
boes; coal-black throughout; ligament granosely 
coriaceous, olive-black. 
Woop, General Conchology, p. 16. 
February, 1847. 
