CHITON. 
Pratt XXVII. 
Species 168. (Mus. Cuming.) 
Curron crrecumvaLLatus. Chit. testdé oblongo-ovatd, 
valvis terminalibus caterarum areisque lateralibus liris 
concentricis eaculptis, centralibus minutissime reticu- 
latis, valved terminali posticd wmbonatd ; nigricante 
rufa, nigro maculata, ligamento arenaceo, tessellato. 
THE INTRENCHED Curron. Shell oblong-ovate, terminal 
valves and lateral areas of the rest sculptured with 
concentric ridges, central areas very minutely reticu- 
lated, posterior terminal valve umbonated; blackish 
red, spotted with black, ligament arenaceous, tessel- 
lated. 
Hab. New Zealand. 
Approaching C. longicymba, but distinguished from 
that species by the conspicuous concentric ridges with 
which it is encircled. 
Species 178. (Mus. Belcher.) 
CHITON scuTIGER. Chit. testd elongata, subangustd, valvis 
medio levi-carinatis, subrostratis, utrinque minute et 
ereberrime granulatis ; peculiariter ustulato-rufa ; liga- 
mento dense setoso, valvarum latera obducto, spiculorum 
cristis parvis munito. 
THE SHIELD-BEARING Curton. Shell elongated, narrow, 
valves smoothly keeled in the middle, slightly beaked, 
minutely and very closely granulated; peculiarly 
burnt-red colour; ligament densely bristled, spread 
over the sides of the valves, and furnished with small 
tufts of spicula. 
Apams and REEvE, Moll. Voy. Samarang. 
Hab. Island of Quelpart ; Korean Archipelago; Adams. 
It is somewhat difficult to discriminate between this 
and the C. hirudiniformis beyond noting a difference of 
colour, except by comparison of specimens in good condi- 
tion, before the ligamentary portion of the mantle has 
become dried and contracted: they are, however, distinct, 
and the simple difference of colour is, in this instance, a 
character to be relied on. 
Species 179. (Mus. Cuming.) 
CHITON LAvIGATUS Chit. testd ovatd, latiusculd, levi aut 
concentrice striatd, areis lateralibus vix distinctis, val- 
varum marginibus posticis minute denticulatis ; albidd, 
coccineo-rufo variegatd et maculata ; ligamento corneo. 
THE smootH Curron. Shell ovate, rather broad, smooth 
or concentrically striated, lateral areas scarcely dis- 
tinguished, posterior edges of the valves minutely 
denticulated ; whitish, blotched and variegated with 
scarlet red, ligament horny. 
Frumine, Edin. Ency. v. 7. p. 103. 
Chiton latus. Lowe. 
Hab. Britain; Lowe. West coast of Sweden; Lovan. 
Easily distinguished by its scarlet red painting, the 
denticulated edges of the valves being articulated red and 
white, whilst the valves are richly tinged with rose-red 
posteriorly in the interior. 
Species 180. (Mus. Cuming.) 
Curron crrceLtatus. Chit. testd oblongo-ovatd, valvis 
postice subproductis, levibus, sulcis circularibus pecu- 
liariter exsculptis ; atrd ; ligamento dense brevisetoso, 
valearum latera obsito, spiculorum cristis parvis munito. 
THE CIRCLED CurTon, Shell oblong-ovate, valves some- 
what produced posteriorly, smooth, peculiarly sculp- 
tured with circular grooves; jet black; ligament 
densely beset with short bristles, spreading over the 
sides of the valves and furnished with small tufts of 
spicula. 
Apams and Rexve, Moll. Voy. Samarang. 
Hab. Island of Quelpart ; Korean Archipelego; Adams. 
This is the largest of the tufted species, and quite pecu- 
liar in its style of sculpture ; the valves in all others of 
this group are minutely granulated, but in this they are 
smooth, and characterized by a number of fine grooves 
radiating in concentric order from the umbones. 
Species 181. (Mus. Cuming.) 
Curron Cunnincuamtit. Chit. testd oblongo-ovatd, valvis 
crassiusculis, undique concentricé liratis, striis elevatis 
ab umbonibus radiatis, posticd terminali, retuso-wmbo- 
natd, areis lateralibus via distinctis; viridi-nigrd, 
valvis medio fascid fuscd longitudinaliter pictd ; liga- 
mento corned. 
CunntneHam’s Curron. Shell oblong-ovate, valves 
rather thick, concentrically ridged throughout, radi- 
ated from the umbones with raised striz, posterior 
October, 1847. 
