XX 
Flexilis (f). | Conica, 243. 
SPIRORBIS. | 
Nautiloides, 9. | SERPULA. 
Spirillur, 9. | Mulleri, 12, (8S. Verm- 
Granulata, 10, f. 64. cularis, Montagu and 
Heterostropha, 10.Young Turton,) (g). Variety 
? Minuta, 11. Spirorbis Reversa, 12. 
Carinata, 10. Variety coiled up in 
Corrugata, \\, f. 65. substances to which it 
Iucida, 11, f. 63. cannot attach itself, 
Cornea, 12. | Solitaria, 265, f. 67. 
(f) Tube free, subcylindrical, flexuous, elastic, 
scarcely, if at all, tapering, membraneous, without (for the 
most part) sand, stones, broken shells, or any foreign 
substances attached; the lines of growth circular, the 
thickness not exceeding a crowquill. Scarborough, from 
6 to 8 inches in length. 
(g) I may as well mention that the variety B. of Tur- 
ton’s Dictionary, (p. 152,) is but a V. Triquetra, so 
located as to be unable to spread at the base. I state 
this from the possession of a specimen authenticated by 
Turton. The variety Solitaria, were it not always flat- 
tened above and considerably smaller, might easily be 
confused with Tubularia, 
