GASTEROPODA. 127 



Shell conical and elevated, with seven volutions ; upper part slightly concave ; 

 lower part convex, covered with about seven transverse granular ridges, and one small 

 intermediate thread ; base rather flat, concentrically striated ; aperture trapezoidal. 



Axis, 1 inch. 



Locality. Red Crag, Sutton, Newbourn, and Walton Naze. 



This species is by no means rare. It is presumed to be distinct from the pre- 

 ceding, from its being much more elevated, and from its having the upper half of 

 the volutions deeply indented or concave. The variety fig. 8 c resembles T. papillosus^ 

 but is more elevated. It is only a different form of this species, if it be distinct ; it is, 

 however, possible they may be varieties of T. papillosus, but among my numerous 

 specimens there are none that will fairly unite the two. 



7. Teochus millegeanus. Phil. Tab. XIII, fig. 1, a — b. 



Trochus millegranus. Phil. En. Moll. Sic. vol. i, p. 183, t. 10, fig. 25, 1836. 



— — ... vol. ii, p. 154, 1844. 



— — Thorpe. Brit. Mar. Conch, p. 264, fig. 36, 1844. 



— Martini. Smith. Wern. Trans, vol. viii, p. 99, t. 1, fig. 26, 1838. 



— elegans. Jeffreys. MS. 



Tr. Testa conicd, elevatd; anfractibus planatis, subimbricatis ; basi marginatis, pro- 

 minidis; ultimo anfractu angulato; transversim lineatis, lineis elevatis granulatis ; basi 

 planiuscald, striata ; aperturd rhomboided. 



Shell conical, elevated, thick, and strong ; whorls flat, transversely striated, and 

 granulated,, with a carinated and marginated edge; base rather flat and striated; 

 aperture rhomboidal. 



Axis, | of an inch. 



Locality. Cor. Crag. Recent, Mediterranean and Britain. 



By a comparison with a recent specimen from the Mediterranean, given to me by 

 Prof. Forbes, the Crag shell appears to agree with the recent species in most of its 

 characters, although it has lost a good deal of its granulated exterior ; the trans- 

 verse ridges on the lower part are nearly smooth. It has a prominent line at the 

 lower part of the volution, and a very slight thickening at the base of the columella. 

 Prof. Forbes, who has seen my specimens, agrees with me in thinking that it is only 

 an altered form of T. millegranus. 



8. Teochus multigeanus. S. Wood. Tab. XIII, fig. 3, a —b. 



Trochus asperulus. S. Wood. Catalogue 1842. 



Tr. Testa conicd, elevatd, erassd ; anfractibus 5—6, planiusculis granulatis ; basi 

 marginatis, prominulis; ultimo anfractu sub angulato ; transversim lineatis, lineis elevatis 

 granulatis, non imbricatis ; basi planiusculd ,- columella obliaud, obsolete unidentatd. 



Shell conical, elevated, thick, and strong ; volutions 5— 6, rather flat, ornamented 

 with 6—8 transverse granulated ridges; last whorl subangulated ; base somewhat 

 flat, and a thickened or obscurely-toothed columella; aperture trapezoidal. 



