362 MOLLUSC. PECTINIBRANCHIA. Haliotis. 



haliotime. 



Gen. LXXXV. HALIOTIS.— Left margin of the shell 

 pierced by a row of holes. 



357. H. tuberculata. — Ovate-oblong, spirally striated with 

 irregular transverse folds. 



Auris marina major, List. Conch, t. Dcxi. f. 2. — Hal. tub. Linn. Syst. 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 

 within ; 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. 



CREPIDULIDiE. 



Gen. LXXXVI. CALYPTREA— Shell conical, with a 

 central subspiral apex ; cavity with a restricted subspiral 

 plate. 



358. C. chinensis. — Shell depressed, apex central, blunt, with 

 a single whorl ; unequally striated spirally. 



Patella rotunda, List. Conch, t. Dxlvi. f. 39 — P. chinensis, Linn. Syst. i. 



1257 P. albida, Don. Brit. Shells, t. 129 — P. chin. Mont. Test. Brit. 



489. t. xiii. f. 4. — West coast of England and Dublin Bay, on oysters. 

 Breadth jjths, height |ths, brownish-white ; widely conical ; surface rough 

 with short concave scales ; inside smooth and glossy ; the spiral striae 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 agreeing with Lister's Pa~ 

 tclla 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.— Shell conical, with a spiral groove 



marking the whorls ; aperture orbicular, with a regular 



decurrent spiral plate occupying the cavity. 



1. I. rectum Conical, concentrically striated ; apex central, acute, turns 



of the spire obsolete ; plate rectangular ; pillar slender.—S'twer. Min. Conch. 

 t. xcvii. f. 3 In Crag at Holywell. 



