GASTEROPODA. 319 
defined, but the latter are a little raised, and under a magnifier they 
usually exhibit two or three radiating striz and conspicuous lines of 
growth; the central areas also have the dots in parallel, longitudinal 
lines, most marked at the margin, and becoming oblique at the centre. 
Terminal valves similarly marked, the posterior one very slightly 
beaked. Margin covered with pale, microscopic scales; within, very 
pale green. 
Length three-fifths of an inch; breadth seven-twentieths of an inch. 
Inhabits Orange Harbour. 
This is a narrow, elongated species, somewhat of the form of C. 
longicymba, but I am not able to find any description to which it cor- 
responds in sculpture. 
Figures 413, 413, dorsal and ventral views of the shell; 413 3, 
branchie ; 413-c, a single branchial plume. 
CuIToN FRUTICOSUS (Gould). 
Testa ovalis, valde elongata, transversim arcuata, omnino textiliter 
punctata, olivacea, maculis minutis saturatioribus fulgurantibus 
variegata; valvis haud .rostratis ; arets laterakbus prominentibus, et 
linets elevatis interruptis ramosis radiatis ; areis centralibus linets lon- 
gitudinalibus rugosis, ad latera prefundis, ad dorsum evanidis et 
arcuatis sculptis ; area postertort magna, umbonata, lineis tnconspicuts, 
interdum. divaricatis, radiata: intus flavo-olivacea : ligamentum latum, 
palhdum, minutissime granulatum. 
Chiton fruticosus, GouLp ; Proceed. Boston Soc. Nat. Hist., i. 142. 
July 1846. Expedition Shells, 4. 
SHELL much elongated, and very little narrowed at extremities, 
arched from side to side, destitute of a keel or beaks. Colour a dirty 
olive, yellowish along summits and variegated with small, purplish- 
coloured spots, arranged somewhat in zigzag, and generally a lighter 
stripe along each side. Lateral areas prominent and deeply sculp- 
tured, leaving undulating, branched, interrupted rays; central areas 
deeply sculptured near the ligament with longitudinal, rugose lines, 
which become smaller upwards, so that the dorsum appears at first 
