SUPPLEMENT. 203 



(Packard). E. N'orway, 10-130 f. (Sars and others); Labra- 

 dor, 7-50 f. (Packard) ; Mexico (Brit. Mus.) ! 



P. 305. — T. {Margarita) elegantissimus. ^N". of Hebr., 

 170 f. (C. and T.). E. N.E. America, as M. varicosa of 

 Mighels ! 



P. 305. — T. MAGUS. E. Dalmatia (Danilo and others) ; 

 not Eed Sea, Forskal's species of this name being different. 



P. 307.— T. TUMiDijs. N. of Hebr., 530 and 650 f. (C. and 

 T.) F. Bohusliin (Thuden). 



P. 309.— T. CINERARIT78. N. of Hcbr., 189 f. (C. and T.). 

 F. I. of Lewis (Sir H. James) ! ; Bohusliin (Thuden). E. Bay 

 of Biscay (D'Orbigny pere and others) ! Var. variegata. 

 Biarritz (Lischke) ! ; Corsica (Susini) ! ; Naples (Tiberi) ! This 

 variety is not Monodonta cegyptiaca of Payraudeau or T. fa- 

 nulum of Gmelin. T. cinereus, Linne, F. S. ; T. injiatus and 

 T. lineatus, Be Blainville. 



P. 312. — T. UMBILICATTJS. Skyo and Stornoway (J. G. J.) ; 

 Hilbie, near Liverpool (CoUingwood). F. Portrush (A. Bell) ! 



E. Naples (Acton) and Sicily (Benoit) ! Tbp variety Aga- 

 thensis inhabits the lower part of the tidal area, the ordinary 

 or typical form occupying the higher part, and both forms (as 

 well as an intermediate one) occurring halfway between the 

 tide-marks. This species is T. umbiUcalis of Da Costa. 



P. 315.--T. DuMiNYi. F. Monte Mario (Pigacci) ! E. 

 Atlantic coasts of France, Med., and Adr. ! Solarium Philippii, 

 Cantraine ; this specific name has precedence of Duminyi. 



P. 317.— T. LINEATUS. F. Selsea (A. BeU) ! E. Zara 

 (J. G. J.). 



P. 320.— T. MoNTACUTT. N. of Hebr., 189 f. (C. and T.). 



F. Monte Mario (Rigacci) ! ; Rhodes (Mus. J. d. PI.) ! 

 P. 322. — T. STRiATus. F. Italy, from Pisa to Naples. 



P. 324. T. EXASPERATUS. 



Body of a yellowish tinge, dark brown in front, and mottled 

 with purple, yeUow, and flake-white : mantle having rather 

 large side-lappets ; that on the right hand is plain, and the 

 other is minutely notched at its edges : head furnished with a 

 nearly cylindrical snout, which is scalloped in front, and with 

 two fringed lobes which lie above the snout, one on each side : 



