456 MAZATLAN TJNITALVES 



Family TURBns'ELLID.E. 



Gekus TUEBI^ELLA, Lam. 



Journ. Mst. Nat. 1799, pars ■.—Phil JSandh. Conch, p. 140 :— 



(non Turbinellus. Oken.) 

 Cynodonta, ScJium. -.—Gray Fig, Moll. p. 68, no. 14. 

 Vasum, (BoUen,) H. ^" A. Ad. Gen. i. 155. 



581. Ttjebinella c^stus, Brod. 



Proc. Zool. Soc. 1833, p. S.—MilU. Syn. Nov. Test. Viv. p. 156.— 

 Bve. Condi. Ic. pi. 6, f. 31.— C. B. Ad. Pan. Snells, p. 130, 

 no. im.^MTce. in Zeit.f. Mai. 1851. p. 17, no. 81. 



Vasum csestns, H. Sf A. Ad. Gen. i. 156. 



=Tnrbmella arcleola, Val. Bee. Ohs. vol. ii. p. 283. (1833.) 



Shell known from the "v^ry similar W. Indian T. muricata 

 by the want of the intercalary plait between the large ones, 

 which are 4, sharp in the yonng shell, sometimes flattened m 

 the adult. Shell ponderous, covered with a ver>- thick olive 

 epidermis in layers of growth. Spire generally eroded. Um- 

 bilicus sometimes distinct, sometimes only a chmk. Mouth 

 marble white. Operculum very small for the shell, thick, 

 horny, nearly smooth ; unguiculate, much twisted, muscular 

 scar corrugated from the terminal nucleus. It was rare m the 

 L'pool Col., more common in the Havre Coll., a large number 

 of specimens having^been seen in a London shop with the beau- 

 tiful epidermis carefully cleaned off. A finely grown specimen 

 measures long. 4-6, long. spir.V^, laf.3% /">• 90"- -^^^ 

 largest (with the spire decorticated) measures 5*2 by 6 b, and 

 weighs 14 oz. 

 Sah —Bay of Caraccas ; in soft mud among rocks ; Cuming.— 



Taboga ; on sand beach, near low water mark, very rare ; 



C. B. ^t?a;ws.— Mazatlan ; not common ; L'pool Sf Havre Coll. 



Tablet 2073 contains a young, finely grown sp., spire promi- 

 nent —2074, the most perfect sp. with operculum.— 20/ d, the 

 largest sp. with operculum .-2076, 1 sp. deformed growth, 

 upper teeth much flattened.-2077, 1 sp. the entire spire abra- 

 ded ; mouth reddish green.— 2078, 1 sp. curiously detormed, 

 plaits obliterated except one dull callus. 



