GASTEROPODA. 213 
Inhabits the Straits of De Fuca, Oregon. Pickering. 
Nearly the same as N. zmpervia, Phil., from Cape Horn, which has 
a very depressed spire, and its umbilicus closed by a semicircular cal- 
lus. Its form and colour is like N. ammaculata, Totten., though it 1s 
much larger. It is more solid and less globular than N. Grenlandica. 
Figures 254, 254 a, ventral and dorsal views of the shell. 
Natica DILECTA ((Crould ). 
Testa parva, globulosa, solida, sub epidermide sordido eburnea, lineolis 
rubiginosis araneosts scutulata et prope suturam lturis castaneis 
maculata: spira rotundata, anfractibus quinque ventricosis: apertura 
semilunaris ; labro crasso; columella valde callifera, callo anticé et ad 
funiculum castaneo, et canal transverso feré diviso; umbilico amplo, 
Suniculo feré impleto. 
Natica dilecta, Goutp; Proceed. Boston Soc. Nat. Hist., i. 73. 
November 1848. Expedition Shells, 50. 
SHELL small, very solid, nearly globular, polished and shining, 
covered with a russet-coloured epidermis, under which the shell is 
ivory white, reticulated with a very minute network of rusty brown 
or fawn-colour, leaving occasional white patches, and with a series of 
chestnut-coloured blotches, revolving on all the whorls near the suture. 
Whorls five, well rounded, a little flattened and appressed posteriorly ; 
suture obovate ; the aperture is semicircular, setting off somewhat from 
the last whorl. The umbilicus is large, but nearly filled by the funi- 
culus, leaving only a sort of exterior canal, which crosses and nearly 
divides the columella: the outer lip is thick; pillar lip covered with 
callus, which is copious above, and at the basal point where the pillar 
meets the lip ata right angle. This point is tinted chestnut-brown, as 
well as the callus which covers the funiculus. The operculum is 
undoubtedly bony. 
Diameter five-eighths of an inch. 
Probably obtained at the mouth of the Rio Negro, Patagonia. 
54 
