GASTEROPODA. 93 



I have considered this as distinct from the preceding, in consequence of the 

 volutions being contiguous ; the lamellae, also, are numerous, less prominent, and re- 

 flected, and it is a more subulate shell. It appears to resemble S. clathratula, particu- 

 larly in the young state, but thecostasare elevated into small spinous fronds, projecting 

 upwards around the upper part of the volution — a character I do not observe in 

 my numerous specimens of that species, and the costas are fewer in number (gene- 

 rally twelve), and thicker. 



A Tertiary fossil, found in the beds of the Tagus, and recently described by 

 Mr. Smith (in the Quarterly Journal of the Geological Society), under the name of 

 Sc. tenera, is perhaps the same species, its distinguishing character being a small 

 mucronation at the upper part of each rib. 



7. Scalaeia foliacba. /. Sow. Tab. VIII, fig. 17. 



Scalaria foliacea. J. Sow. Min. Conch, t. 390, fig. 2, 1825. 



— S. Wood. Catalogue 1842. 



— G. Sow. Genera of Shells, fig. 5. 



Sc. Testa turritd, acuta, im perforata ; anfractibus rotundatis, lavigatis, disjunctis 

 costatis ; costls 5 — 7, tenuibus, lamettiformibus, distantibus ; aperturd, rotundald. 



Shell turreted, spire elevated ; apex acute ; base imperforate, whorls cylindrical, 

 smooth, and disjoined; ribs oblique, lamelliform, thin and distant, seven in the last 

 volution ; aperture circular, peristome reflected ; without a keel upon the basal 

 volution. 



Axis, 1 inch. 



Locality. Cor. Crag, Sutton. 

 Red Crag, Sutton. 



An abundant shell in the Coralline, but very rare in the Red Crag. It differs 

 from Turbo pseudo scalaris, Brocchi (t. 7, f. 1), which has a prominent line upon the 

 base of the volution, though M. Philippi has given this shell as a synonyme to his 

 S. pseudo scalaris ; the ribs also are fewer in number, and the volutions more dis- 

 joined. The lamellae form a continuous rib up the spire, in an oblique or slightly 

 spiral direction, and are more especially reflected in the middle of the outer lip. 



8. Scalaria subulata. /. Sow. Tab. VIII, fig. 18. 



Scalaria subulata. J. Sow. Min. Conch, t. 390, fig. 1, 1825. 



— S. Wood. Catalogue 1842. 



— Nyst. Coq. foss. de Belg. p. 394, pi. 38, fig. 8, 1844. 



Sc. Testa turrit a, elongata, subulata, laviyatd, imperforatd ; anfractibus 10 — 11, 

 rotundatis, disjunctis costellatis ; costellis obtusis ; in anfractu ultimo decern. 



Shell turriculate, elongate, tapering, and smooth ; whorls 10 — 11, rounded or 

 cylindrical, disjoined and costated ; ribs slightly oblique, ten in the last volution ; 

 base imperforate ; aperture subovate. 



Axis, f of an inch. 



Locality. Cor. Crag, Sutton. 



