91 



TflOCHUS monilifer. 



TAB. CCCLXVII. 



Spec. Char. Conical, transversely striated; 

 vohitions ratlier convex with three rows of 

 tubercles and crenated edges ; base slightly 

 convex bearing six rows of granules ; aper- 

 ture quadrangular ; columella curved along 

 one edge of the aperture, truncated. 



Syn. Trochus nodulosus. JBrander^f. 6. 



T. monilifer ? Lamarck env. de Paris, p. 99. 



J\ REGULARLY conicalshell whose base is equal in diameter 

 to the height. The aperture is placed obliquely, it has an 

 entire waved edge. The tubercles upon the spire are 

 placed upon transverse elevations, that give the volutions 

 a convex appearance ; the centre of the base is smooth 

 but not umbilicated ; the inside is pearly. 



For excellent specimens of this long known elegant 

 Trochus, we are indebted to Miss Teed, who sent them 

 from llordwell. It is probable that the T. monilifer of 

 De Laraark is a distinct species, although nearly related 

 to the Hampshire Trochus nodulosus, for the only 

 specimen I have from France has rather concave whorls, 

 a fiat base, with the columella projecting, and eight 

 rows of granules, agreeing with Lamark's description 

 and besides, the surface shews no transverse striae, 

 but it is not perfect, it is certainly a distinct species ; but 

 that it be Lamarck's, I have no proof, and Lamarck re- 

 fers to Brander's nodulosus, which is quite distinct from 

 the recent species of that name. 



