SCALARIA. 213 



S. Trevelyana, Leach. 



Of an uniform orange pink or pale fawn colour, never pure 

 white ; no spiral sculpture ; ribs not quite laminai', though 

 narrow, usually about twelve, never exceeding seventeen. 



Plate LXX. fig. 7, 8 ; and (Animal) Plate F F, figs. ] to 3. 



Scalaria Trevelyana, Leach, in Raine's Durham (no description). — Winch, 

 Annals Philosoph. vol. xx. (1822, New Series, vol. iv.) p. 

 434. — Thompson, Ann. Nat. Hist. vol. v. p. 245. — 

 Johnston, Berwick. Club, vol. i, p. 263. — Maclaurin, 

 Berwick Club, vol. ii. p. 40. — Brit. Marine Conch, p. 

 254, f. 27.— Alder, Cat. Moll. Northumb. and Durh. 

 p. 48. — SowERBY, Thesaur. Conch, vol. i. p. 100, pi. 35, 

 f. 129. — LovEN, Index Moll. Scan. p. 16. — Searles 

 Wood, Crag Mollusca, p. 94, pi. 8, f. 20 (fossil). 



The name Trevelyana appears to have first been pub- 

 lished in " Raine's Account of Durham,"" and although the 

 Scalaria to which it was applied, was neither defined by 

 figure nor language, its specific individuality was recognised, 

 and the traditional epithet preserved in the cabinets of our 

 northern collectors. The merit then of having constituted 

 this very distinct species, is conceded to Dr. Leach by the 

 courtesy of those who have described it, but had any 

 writer in the interim between its simple indication and 

 comparatively recent description, adequately defined it 

 under a different appellation, the name of the later author 

 must have been preferred.* 



The shell is simply turreted, not very strong or trans- 

 parent, and of an uniform glossy pink cream or fawn 

 colour. From twelve to seventeen smooth, simple, not 



* In justice to the memory of Dr. Leach, we must remark, that his manuscript 

 names were not bestowed on that haphazard appropriative principle that seems to 

 actuate certain curators of the minor continental museums, but were those ac- 

 tually applied by him to the several objects in his intended large work upon the 

 Mollusca of Great Britain, of which we have seen the unpublished proofs of 

 about one hundred pages, and about nine or ten engravings. 



