336 MOLLUSCA. 
The radiating strie occupy the upper half of the shell, and the lower 
half is somewhat imbricated by the stages of growth. It is somewhat 
like P. Candez, D’Orb. 
Figures 448, 448 a, views of the exterior and interior of the shell. 
PaTELLA Luctuosa (Gould). 
Testa obliqué conica, crassa, vertice eccentrica, obscuré olivacea, inter- 
dum sanguineo tincta, costis majoribus ad duodecim rotundatis, sca- 
brosis, pallidis munita, minoribus quibusdam interjectis: apertura 
ovalis ; margine crenulato: facies interna livida, reflexionibus succi- 
neis micans ; limbo fasciis fuscis et albidis inequahibus alternantibus 
radiato. 
Patella luctuosa, Goutp; Proceed. Boston Soc. Nat. Hist., ii. 150. 
July 1846. Expedition Shells, 8. 
SHELL thick, rough, and angular, apex near the front, obliquely 
conical, outline arched, the anterior outline approaching to perpendi- 
cular, of an obscure olive-green colour, sometimes mixed with purple. 
The surface has about twelve, ash-coloured, principal ribs, which are 
rounded, lighter coloured, and roughened with scales and tubercles; 
between two of these are two or three similar, but much smaller ribs, 
which in young specimens are tubercular, beaded alternately jet and 
white. Aperture broad-ovate; the interior is of a dusky leaden hue, 
with amber-coloured reflections; the central spatulate spot is of a 
uniform colour, or paler at the centre, and the remainder is radiated by 
golden rays answering to the large ribs, and broader dusky ones, some- 
times subdivided by narrow white lines, answering to the secondary 
ribs; margin irregularly crenate, everted ; base arched, so that the shell 
rests on its extremities. 
Length an inch and a quarter; breadth one inch; height half an 
inch. 
Inhabits New Zealand. 
A small species, of unusually rough and irregular surface, and dull- 
