CHITON. 
Pirate XXI. 
Species 136. (Mus. Gray.) 
Cuiron Coutrer. Chit. testd ovatd, valud anticé termi- 
nali octo-radiatd, posticd parvd, umbonatd, areis late- 
ralibus granatis, marginibus conspicué elevatis, fortiter 
granatis, areis centralibus longitudinaliter tenuiliratis, 
iris minute granulatis, subundulatis, interstitiis exca- 
vatis ; olivaceo-nigricante ; ligamento corneo, densissimé 
longisetoso. 
CouLurg’s Curton. Shell ovate, anterior terminal valve 
eight-rayed, the posterior small, umbonated, lateral 
areas grained, edges conspicuously raised, strongly 
grained, central areas longitudinally finely ridged, 
ridges minutely granulated, a little waved, interstices 
excavated ; olive-black, igament horny, very thickly 
beset with long bristles. 
Gray, MSS. (private cabinet.) 
Hab. ? 
A most elaborately sculptured species, chiefly remarkable 
on account of the lateral areas being depressely flattened, 
whilst their strongly granulated edges are conspicuously 
raised, in the form of diverging ridges. It appears to 
have been collected during the voyage of H.M.S. Blos- 
som, and is extremely well figured by Mr. Sowerby in Capt. 
Beechey’s volume of the Zoology (Pl. 41. fig. 17); having 
been named, however, C. se¢osus in error, Mr. Gray pro- 
poses that it be dedicated to the memory of the late 
Mr. Collie, assistant-surgeon of the Expedition. 
Fig. 137. (Mus. Gray.) 
The specimen here represented proves to be a state of 
the C. Barnesii, in which the ligament is stripped of its 
calcareous grains, and the valves contracted one upon the 
other. For Species 137, see Pl. XX VI. 
Species 138. (Mus. Brit.) 
Cuiton Guripinew. Chit. testd ovatd, valvis medio levi- 
bus aut striatis, ad latera unicostatis et nitidé undato- 
corrugatis, posticé terminali retusd ; lateribus viridi- 
bus, medio albd, nigro flammaté ; ligamento corneo, 
translucido, densé setoso. 
GuILpING’s Cuiton. Shell ovate, valves smooth, or 
striated in the middle, with a single rib at the sides, 
the ground sculpture being neatly waved-wrinkled, 
posterior terminal valve retuse; sides green, white in 
the middle, flamed with black; ligament horny, 
transparent, densely bristled. 
Chiton setosus, Wood, Ind. Test. Supp. 
Hab. St. Vincents, West Indies. 
I dedicate this interesting and apparently rare species, 
to the memory of the Rev. Lansdowne Guilding, to whom 
science is much indebted for his investigation of the 
natural history of the island of which it is an inhabitant. 
Species 139. (Mus. Brit.) 
CHITON NOBILIS. Chit. testd ovati, levigatd aut puncti- 
unculis minutis elevatis undique creberrimée notaté, 
areis lateralibus eailiter radiatim sulcatis ; rufescente- 
chocolato-fusca, immaculatd ; ligamento corneo, setis 
duris brevissimis obsito. 
THE NOBLE CurITon. Shell ovate, smooth or very closely 
marked throughout with minute raised dots, lateral 
areas faintly radiately grooved; reddish chocolate- 
brown, unspotted ; ligament horny, beset with very 
short hard bristles. 
Gray, MSS. British Museum. 
Hab. 2 
A fine species, of simple character yet perfectly distinct ; 
indeed it has no similitude with any hitherto described. 
Species 140. (Mus. Brit.) 
CHITON vIRGULATUS. Chit. testa oblongo- vel subelongato- 
ovatd, valvis terminalibus ceterarum areisque lateralibus 
creberrime radiatin striatis, striis elevatis, crassiusculis 
deinde tenuioribus et undulatis, areis centralibus pul- 
cherrime longitudinaliter arcuatim elevato-striatis ; oli- 
vaced, medio lutescente olivaceo variegata ; ligamento 
granoso-coriaceo, tessellato. 
THE stRipeD CuiTon. Shell oblong or subelongately 
ovate, terminal valves and lateral areas of the rest 
very closely radiately striated, striz raised, rather 
thick, then thin, and little waved, central areas very 
beautifully arcuately elevately striated; dark olive, 
yellowish in the middle, variegated with olive; liga- 
ment granosely coriaceous, tessellated. 
Sowzrsy, Mag. Nat. Hist. 1840. 
Hab. ? 
The form of this species varies considerably from oblong- 
May, 1847. 
