368 Mr. Jerrreys on the Testaceous Pneumonobranchous 
fuscescens. Anfractus 6—8. Apertura oblonga, in- 
tùs subincrassata, plicis 3—5 columellaribus instructa : 
peristomio subreflexo. | 
. Long. 0.3.— Diam. 0.125. | 
Voluta denticulata. Mont. Test. Brit. p.234. t.20. f. 5. j 
a. ventricosior, plicis columellaribus 2 vix 3. 
Turbo bidentata. Walker Test. Min. Rar. f. 50 & 53. 
Auricula myosotis. Drap. Hist. des Moll. p. 56. t. 3. 
| FAG h | | 
B. labio interno denticulato. | 
Voluta ringens.  Turton's Conch. Dict. 
y. major; spirà productiore, aperturz labio denticulato. 
Voluta reflexa. Turton’s Conch. Dict. 
Among the rejectamenta of rivers, &c., near their com- 
 munication with the sea. The variety y. is found, unmixed 
with the common sort, in the clefts of rocks on the Swansea 
coast near high-water mark, within the influx of the tide. 
This variety is less ventricose, and has the peristome not so 
much reflected on the columella. I was at first inclined to 
consider it a distinct species; but the intermediate gra- 
. dations are almost imperceptible, and I have been assured 
itis found, together | with the other varieties, in the crevices 
our walls at Weymouth. | e 
"1 saapect ‘that the Voluta hyalina of. Montagu i is only an 
imperfect specimen of this last variety. — 
2. BIDENTATA. 
kim albidum. — Tentacula perbrevissima, sube 
| mata. ( Mont.) 
Testa * ovata, naim, solida, alba, pistons nitida, spirà 
