CHITON. 
Puate XVI. 
(Figures slightly magnified.) 
Species 87. (Fig 87 and 90. Mus. Cuming.) 
CHITON UNDULATUS. Chit. testd ovatd, valvis transverse 
subangustis, medio rostratis, levibus, areis lateralibus 
interdum obscuré liratis ; albidd aut rubido-lutescente, 
valvis lineis concentricis viridibus conspicue ornatis, 
ligamento corneo, subarenaceo. 
THE waved Curton. Shell ovate, valves transversely 
rather narrow, beaked in the middle, smooth, lateral 
areas sometimes obscurely ridged; whitish or reddish 
yellow, valves conspicuously ornamented with green 
concentric lines, ligament horny, subarenaceous. 
Quoy and Gaimarp, Zool. Voy. de l’Astrolabe, v. 3. p. 
393. pl. 75. 
Extremely variable in respect to colour, but the general 
design of the painting is characterised by a waved concen- 
tric arrangement, mostly green. 
Species 88. (Mus. Cuming.) 
CuITon PERTUSUs. Chit. testd oblongo-ovaté, valvis medio 
elevatis, undique creberrimé sulcatis, liris arearum cen- 
tralium tenuibus, umbones versus convergentibus, sulcis 
interstitialibus pertusis, valvarum margine postico ser- 
rato; rubidd, punctis paucis minutis albis aspersd ; 
ligamento corneo, setis brevibus perpaucis obsito. 
THE PRICKED Curton. Shell oblong-ovate, valves ele- 
vated in the middle, very closely grooved throughout, 
ridges of the central areas thin, converging towards 
the umbones, interstitial grooves pricked, posterior 
edge of the valves serrated; dark red, sprinkled with 
a few minute white dots; ligament horny, very 
sparingly beset with short bristles. 
Hab. Simon’s Bay, Cape of Good Hope; W. V. Hennah. 
The pricked interstices between the close-set ridges 
which constitute one of the distinguishing features of this 
species are scarcely discernible without the lens. 
Species 89. (Mus. Cuming.) 
Curron Catirornicus. Chit. testé oblongo-ovatd, valvis 
medio subrostratis, undique subtilissimé corrugato-cre- 
nulatis, terminalibus ceterarum areisque lateralibus 
laticostatis ; fusco-viridi, ligamento corneo, pilis setis- 
que densé obsito. 
Tue CaLirorntan Cuiron. Shell oblong ovate, valves 
somewhat beaked in the middle, very finely corrugately 
granulated throughout, terminal valves and lateral 
areas of the rest broad-ribbed ; brownish green, liga- 
ment horny, thickly beset with hairs and bristles. 
Nurratt, MSS. 
Hab. California. 
Distinguished by its broad though somewhat obscure 
ribs. 
Species 91. (Mus. Cuming.) 
CHITON TEXTILIS. Chit. testd oblongo-ovatd planiusculd, 
valvis terminalibus ceterarum areisque lateralibus ra- 
diatim liratis, liris planatis, sulcis concentricis perpau- 
cis decussatis, areis centralibus minutissime et pulcher- 
rime, cellulosis cellulis subprofundé excavatis ; sordidé 
alba ; ligamento minuté granoso-coriaceo, quoque sor- 
didé albo. 
THE TEXTILE Curton. Shell oblong ovate, rather flat- 
tened, terminal valves and lateral areas of the rest 
radiately ridged, ridges flattened, crossed with a few 
concentric grooves, central areas very minutely and 
beautifully celluled, cellules rather deeply excavated ; 
dead white; ligament minutely granosely coriaceous, 
also dead white. 
Gray, Spicilegia Zoologica, p. 5. pl. 6. f. 20. 
Hab. Cape of Good Hope (under stones at low water). 
Of an uniform dead white, remarkably distinguished 
by the very minute elaborate cellular honey-comb sculpture 
of the central areas. 
Species 92. (Mus. Cuming.) 
CHITON PALLIDUS. Chit. testd oblongo-ovata, valvis undi- 
que levibus ; sordidé alba ; ligamento corneo, arenaceo, 
Susco. 
THE PALE CurIton. Shell oblong-ovate, valves smooth 
throughout ; dead white ; ligament horny, arenaceous, 
brown. 
? 
Hab. 
Perfectly distinguished from the preceding species by 
its smooth surface and dark brown ligament. 
March, 1847. 
