324 MOLLUSCA. 
Curron puntcEus, (Couthouy MS.) 
Testa parva, oblongo-elliptica, elevata, ad dorsum carinata, punctatis- 
sima, punicea, gradibus @tatis conspicuis obtusis signata: arets late- 
ralibus prerupté elevatis, et sparsim granulatis ; arets centralibus 
costulis longitudinalibus parallelis ad sex, plerumque ad medium dis- 
locatis, clathratis ; valvd posteriori rostro parvulo acuto et septo trans- 
versali notato: ligamentum minutissime imbricatum, adversum suturas 
allido fasciatum. 
Chiton puniceus (Covrnouy MS.); Proceed. Boston Soc. Nat. 
Hist., ii. 143. July 1846. Expedition Shells, 5. 
Anrmat with the head large, distended on each side into a sort of 
lappet. Foot large, oval, flesh-colour ; branchie small, appearing like 
a series of small tubercles, and only extending from midway of the 
foot to the anal canal, pale ochreous. 
SHELL small, thin, elongated, elliptical, elevated, and sharply cari- 
nated along the back, of a dull rose, or bright brick-red colour, and 
everywhere minutely punctured. The lateral areas are very abruptly 
and distinctly elevated, regularly ridged by the obtusely rounded 
stages of growth, and bearing a few scattered granules. Central areas 
with the lines of increase well marked, and remarkably barred with 
about six elevated, longitudinal, parallel ridges, which are generally 
dislocated about the middle by some of the lines of increase. The 
posterior valve has a very minute, and acute, nearly central umbo, 
with an abrupt depression passing transversely through it; the margin 
is very minutely imbricated by prismatic scales, coloured like the 
shell, and with yellowish bands crossing it, opposite to the junctures 
of the valves. 
Length half an inch; breadth three-tenths of an inch. 
Inhabits Orange Harbour, Tierra del Fuego. 
In colour and shape it resembles C. ruder, but is larger and diffe- 
rently sculptured, and remarkable for the series of parallel ridges on 
the intermediate areas. 
