344 MOLLUSCA. 
PATELLA FIMBRIATA (Gould). 
Testa elevata, oblique conica, fusco-purpurea, cinereo tincta, costulis dis- 
tantibus rotundatis radiata, costulis tuberculos fornicatos in seriebus 
concentricis instructos gerentibus ; apice acuto subcentral: apertura 
ovata ; limbo lato, nigro pectinato: facies interna nitida, caruleo-alba, 
secundum costulos radiata, fundo saturatiori. 
Patella fimbriata, Goutp ; Proceed. Boston Soc. Nat. Hist., 1. 149. 
July 1846. Expedition Shells, 7. 
Suey elongated-oval, conical, apex acute, nearly central; colour 
dusky, with a tint of olive, purplish near the margin; surface with 
about twenty-two small, radiating, pretty regularly disposed, rounded 
ribs, on which are arranged distant, dark-coloured, horizontally com- 
pressed, sometimes even vaulted nodules, disposed in concentric ranges. 
Interior channeled to correspond with the ribs, bluish porcelain-white, 
with a pitchy blotch at centre; marginal limb wide, scolloped, the 
raised portions black, and the depressed spaces bluish. Muscular 
impression scarcely perceptible; when held to the light it appears 
tessellated about the apex, and radiated with light colour between the 
ribs towards the margin. 
Length an inch and one-fifth; breadth nearly an inch; height 
nearly half an inch. 
Inhabits the Straits of De Fuca, Oregon. Lieutenant Case. 
A specimen having the same shape, number of ribs, and interior, 
has the nodules less conspicuous and flattened, the ground-colour deep 
olive, flecked irregularly with whitish. 
It is much like P. granularis, in shape. The undulations within, 
corresponding to the ribs, are marked with unusual distinctness. Its 
ribbed surface and destitution of striz distinguish it from all the varie- 
ties of P. pintadina. 
Figures 445, 445 a, outer and inner views of the shell; 445 0, profile 
view. 
