TRUNCATELLA. 317 



most all the species are tropical or subtropical. They 

 live upon the very verge of the sea, under stones or weeds 

 near hioh water-mark. 



T. MoNTAGui, Lowe. 



Plate XCIX. fig. 1, and (Animal) Plate FF. fig. 10. 



Helix subct/lindrica, Linn. Syst. Nat. ed. 12, p. 1248 (from type) Pultenky, 



Hutchins, Hist. Dorset, p. 49. 

 Turbo truncatus, Mont. Test. Brit. vol. ii. p. 300, pi. 10, f. 7. — Maton and 

 Rack. Trans. Linn. Soc. vol. viii. p. 177. — Rack. Dorset 

 Catalog, p. 51, pi. 19, f. 8.— Turt. Conch. Diction, p. 218. 

 „ suhtruncatus (Young), Mont. Test. Brit. p. 300, pi. 10, f. 1.— Maton 

 and Rack. Trans. Linn. Soc. vol. viii. p. 178. — Turt. 

 Conch. Diction, p. 218. 

 Ttirritella truncata and svhtruncata, Fleming, Brit. Animals, p. 303. 

 Cydostoma truncatidum, Jeffreys, Trans. Linn. Soc. vol. xvi p. 363. 

 Truncutdla JMontagui, Lowe, Zoolog. Journ. vol. v. p. o03. — Brit. Marine 

 Conch, p. 146, f. 75. — Reeve, Conch. Systemat. vol. ii. 

 pi. 182, f. 1 — Pfeiff. Zeitschr. Malak. 1846, p. 185. 

 Rissoa truncata, Macgii.liv. Moll, Aberdeen, p. 152. 



Eulima nitidissima, Macgilliv. Moll. Aberd. p. 142 (Young, teste Jeffreys, 

 from types). 



Where a species is so inadequately defined, as to render 

 its identification a matter of conjecture, we think it fair 

 to prefer the name of that author who first clearly in- 

 dicated its specific character. On this principle, we have 

 rejected the epithet suhcylindrica, and as Montagu's 

 appellation is perhaps somewhat objectionable, being indi- 

 cative of a generic, and not a specific peculiarity, we 

 accept for him, as an equivalent honour, the substitute 

 offered by Lowe. Whether the shell is more than an 

 aberrant variety of the Cydostoma truncatulum of Drapar- 

 naud (whose variety y, pi. 1, f. 31, looks very like it), we 

 feel by no means assured, but defer to the judgment of 

 that distinguished Oonchologist (Pfeifier), who has pub- 

 lished a recent monograph of the genus. 



