OOP 



TO 



OOi 



**LAND AND FRESH-WATER.+ 



bo. 



Turbo Mufcdrum, Zri.-S'y^.p.l240—G«e/.^jyZ.p 3611.94. MuscoRUM. 



C/iem. Conch, ix. t. 123. f. 1076. 

 Mullcr Verm. ii. p. 105. No. 304. 

 Schroet Erdconch. p. 140. t. 1. f. 7. 

 Br. Zoo/, t. 82. f 118? 

 Z//?. An^l. t.2. f.6.— r«r/. iw. iv. p. 499. 

 Veti'v. Ga%. t. 35. f. 6. 

 Pult. Cat. Dorfet. p. 46. 

 Don Br. S.'ieUs. iii. t. 80. 

 Turbo cyllndraceus. Da Cojia. p. 89. t. v. f. 16. 



T. with a rmooth, gloITy, fub-pellucid, fub-cylindric 

 fhell, with fix fpires, of a yellowifa-brown horn-colour; 

 apex obtufe: aperture fub-orbicular, marginated; the 

 margin white, a httle reflexed, forming a depreffion, or 

 fub -umbilicus ; pillar lip frequently furnifhed with a fingle 

 tooth. Length rather more than the eighth of an inch ; 

 breadth about one third its length. Dead (hells fre- 

 quently become yellow, and in a further advance to- 

 wards decay are white and opaque. 



The young, even after they are nearly arrived at full 

 growth, are deftitute of the white marginated aperture, 

 and the tooth ; nor indeed is this laft mark always to be 

 found in apparently adult fpecimens. In the more infant 



ftate it has a trochiform bafe and aperture. 



This 



t The Turbo ftifcus and rividui appear to belong to this divifion, but as 

 they arc unknown to us, it was thought proper to leave them together with 

 ihe few other of Mr. Walker's Itells not identified- 



