268 MOLLUSCA. 
~ 
distinctive. It has much the character and marking of C. Broderipii, 
Reeve, but is nearly twice as large. On removing the epidermis the 
surface below is polished, finely reticulated with zigzag, fawn-coloured 
lines, with sometimes one or two zones of purplish, or of ivory-white 
lunate spots. 
Figure 337, ventral view of the shell, enlarged ; 337 a, dorsal view, 
with the epidermis removed ; 337 4, natural size. 
CoLUMBELLA VALGA (Gould). 
T. ovato-lanceolata, sub-distorta, fulvo-marmorata et lineolis crebris 
rufis cincta, ad apicem rosacea: spira acuminata, anfractibus novem 
ad decem convexiusculis, supernis longitrorsum tenuiter plicatis, ultimo 
levi, contracto, ceteris nonconformibus dimidiam longitudinis teste 
superante ; sutura profundd: apertura angusta, lunata ; labro arcuato 
acuto, intus sulcato: columella transversim plicata, callosa; sinu 
stphonali angusto, producto. 
Columbella valga, Goutp; Proceed. Boston Soc. Nat. Hist., iii. 169. 
January 1850. Expedition Shells, 71. 
ANIMAL deep ochreous yellow ; siphon annulated with ochreous. 
SHELL small, solid, ovate-lanceolate, somewhat gibbous, shining, of 
a pale fawn-colour, girdled by threadlike chestnut bands, of which 
there are four or five on the upper whorls; these upper whorls have 
delicate, longitudinal folds, which appear on the lower whorl, but 
shghtly at its upper portion; base of the lower whorl with a few re- 
volving threads. Whorls nine or ten. slightly convex, the penulti- 
mate whorl large in proportion to the basal whorl, so as to give the 
shell a gibbous or distorted form; last whorl three-fifths the whole 
length of the shell, tapering to the base ; rostrum somewhat elongated, 
recurved ; suture linear, deeply impressed. Aperture narrow, two- 
fifths the length of the shell; outer lip regularly and slightly arcuated 
with rib-strie within; pillar margin angular at its upper third, well 
covered with callus. 
Length half an inch; breadth one-fifth of an inch. 
