S62 MOLLUSC. PECTINIBRANCHIA. Haliotis, 
haliotidj:. 
GtEN. LX.XXV. HALIOTIS. — Left margin of the shell 
pierced by a row of holes. 
357. H. tuherculata. — Ovate-oblong, spirally striated with 
irregular transverse folds. 
Auris marina major, List. Conch, t. Dcxi. f. 2 — Hal. tub. Linn. Sjst. i. 
1256. Mont. Test. Brit. 473. — On rocks at low water-mark at Guern- 
sey and Jersey ; rarely thrown ashore on the southern coasts of 
England. 
Length from three to four inches, breadth from two and a quarter to 
three inches ; strong, opake, brownish on the outside, beautifully iridescent 
Muthin ; apex with a single spiral turn, slightly produced ; outer lip thin, 
inner lip thickened, inflected, and smooth. Animal with the sides ornament- 
ed with filaments, some of which pass through the holes in the shell ; hood 
emarginate, proboscis with two corneous cheek-plates, and a narrow spinous 
tongue. 
CREPIDULTDiE. 
Gen. LXXXVI. CALYPTREA.— Shell conical, with a 
central subspiral apex ; cavity with a restricted subspiral 
plate. 
358. C. dvmensis . — Shell depressed, apex central, blunt, with 
a single whorl ; unequally striated spirally. 
Patella rotunda. List. Conch, t. Dxlvi. £ 39 — P. chinensis, Linn. Syst. i. 
1257 — P. albida, Bm. Brit. Shells, t. 129 — P. chin. Mont. Test. Brit. 
489. t. xiii. f. 4. — West coast of England and Dublin Bay, on oysters. 
Breadth |ths, height fths, brownish- white ; widely conical ; surface rough 
with short concave scales ; inside smooth and glossy ; the spiral strise mark 
the direction of the growth of the shell. 
EXTINCT SPECIES. 
Mr Parkinson has figured a shell from the Crag of Essex (Organic Re- 
mains, iii. 52. t. V. f. 10.), which he considers as a^*eeing with Lister’s Pa- 
tella rotunda. “ It forms a depressed cone, with a circular base and mammil- 
lary apex.” Some specimens from Harwich ‘‘ had their upper parts com- 
pletely invested with a mineralized sponge, or alcyonic mass.” 
Gen. infundibulum. — S hell conical, with a spiral groove 
marking the whorls ; aperture orbicular, with a regular 
decurrent spiral plate occupying the cavity. 
1. I. Conical, concentrically striated ; apex central, acute, turns 
of the spire obsolete ; plate rectangular ; pillar slender.— ->S'owen Min. Conch, 
t. xcvii. f. 3.— In Crag at Holywell. 
