CHITON.—Puate IIT. 
Hab. Lord Hood’s and James Islands, Gallapagos (under 
stones); Cuming. 
This fine species is of one uniform intense shining black, 
its absence of colour bemg amply compensated by the 
boldness of its sculpture. 
Species 16. (Mus. Cuming.) 
Curron sauamosus. Chit. testi oblongo-ovatd, valvis 
terminalibus decussatim granoso-radiatis, granis mar- 
ginem versus subprominentibus, valvis ceteris areis late- 
ralibus margine postico serratis, radiatim liratis, lives 
callositatibus parvis graniformibus, oblique interruptis, 
areis centralibus vertice levibus, utringue liratis, liris 
umbones versus concentricé curvatis ; olivaceo-cinered, 
hic illic saturatioré varia ; ligamento sqyuamato-coriaceo, 
olivaceo-cinereo, maculis grandibus olivaceis tessellato. 
THE scaLy Curron. Shell oblong-ovate, terminal valves 
decussately granosely rayed, grains rather prominent 
towards the margin, the rest of the valves with the 
lateral areas serrated along the posterior edge, 
radiately ridged, ridges obliquely interrupted, with 
small grain-like callosities, central areas smooth along 
the top, ridged on both sides, ridges concentrically 
curved towards the umboes; olive-ash, here and 
there variegated of a darker tint; ligament squamately 
coriaceous, olive-ash, tessellated with large olive spots. 
Variety 8. (PI. IV. Fig. 23. Mus. Cuming.) 
Testa omnino nitide olivaceo-nigricans. 
Shell altogether shining olive-black. 
Linnaus, Syst. Nat. (12th edit.) p. 1107. 
Hab. West Indies. 
When we consider that 
corpore sguamuloso”’ was the sole diagnose which Linnzeus 
attached to this species, it is not to be wondered that more 
than one should have been confounded with it by subse- 
quent authors. Little did the profound author of the ‘ Sys- 
tema Nature’ think that the brief enumeration of characters 
just quoted, might be applied to some scores of species then 
abounding in their concealed places of attachment, along 
the shores of the South Pacific Ocean. 
It is only necessary, however, in the present instance to 
refer to the C. Sicudus, represented in Pl. 2; in that species 
which has been confounded with the C. sgwamosus by both 
Lamarck and Philippi, the longitudinal grooves of the 
central areas are straight, in this they are concentrically 
curved towards the umboes; the radiating ridges of the 
lateral areas are regular and smooth in the C. Siculus, 
in the C. sguamosus they range obliquely and are inter- 
rupted at intervals with small granular callosities, the 
posterior edge of the areas, too, are serrated; the terminal 
valves of the former species, like the lateral areas, are 
rayed with simple, smooth ridges, divided hemispherically 
“testa octovalvi semistriatd, 
crosswise into granules, like an engine-turned watch-case, 
and the ligament is much more coarsely coriaceous. 
Species 17. (Mus. Cuming.) 
CuiTon CHILENSIS. Chit. testd, oblongo-ovatd, antice sub- 
attenuata, valvis medio anticé tenuisulcatis, utringue 
striis concentricis et obliquis obscuré decussatis, umbo- 
nibus levibus, appressis ; intense castaned, fere nigra, 
umbonibus lutescentibus rufo exiliter pictis ; ligamento 
corneo, levi, translucido. 
Tue Cuiti Curron. Shell oblong-ovate, a little attenu- 
ated anteriorly, valves finely grooved in the middle 
anteriorly, obscurely decussated with concentric and 
oblique striz on either side, umboes smooth, short, 
appressed ; very dark red-chesnut, almost black, um- 
boes yellowish faintly painted with red: ligament 
horny, smooth, transparent. 
Hab. Valparaiso, Chili (in crevices of rocks and under 
stones); Frembly, Cuming. 
Distinguished from C. elegans, amongst other characters, 
by the absence of granules, and different style of painting ; 
and from C. Chiloensis by the broad appressed structure of 
the umboes, painting, &c. 
Species 18. (Mus. Cuming.) 
Curron cymBroLa. Chit. testd oblongo-ovatd, utringue 
attenuatd, precipue postice, medio angulato-elevatd, 
valois undique levibus, posticd terminali umbonaté ; 
spadiced, areis lateralibus lineis fuscescentibus, acute 
undatis, exiliter pictis, albo per marginem anticam arti- 
culatis, areis centralibus lineis fuscescentibus irregu- 
laribus longitudinatiter undulatis, ornatis, valvarum 
duarum anticarum (in hoc specimine) nigricante-casta- 
neis ; ligamento subtiliter granoso-coriaceo, spadiceo 
fuscoque tessellato. 
THE LITTLE Boat Cutton. Shell oblong-ovate, attenuated 
at both ends, especially at the posterior, angularly 
raised in the middle, valves smooth throughout, pos- 
terior terminal valve umbonated, light fawn-colour, 
lateral areas faintly painted with light brown zigzag 
lines, articulated with white along the anterior edge, 
central areas ornamented with irregular longitudinally 
waved light brown lines, of the two anterior valves 
(in this specimen) blackish-chesnut ; ligament finely 
granose, tessellated with brown and bay. 
Sowersy, Mag. Nat. Hist., 1840. Conch. Illus. f. 45. 
(not f. 85 and 86). 
Hab. ° 
It should be observed that the articulated painting of 
this species is on the front edge of the lateral areas, not on 
the posterior, as in most species in which this design of 
painting occurs 
