122 



CONCHOLOGY. 



Solarium granulatum. 

 S. perspectivum. 

 S. hybridum. 



S. luteum. 



Solarium laevigatum. 

 S. stramineum. 

 S. variegatura. 



3. Genus Trochus. PI. XL 



Animal. Spiral, having the sides' of the body often ornamented 

 with digitated or lobed appendages, and provided with a short 

 foot, rounded at its two extremities ; head provided with two 

 tentacula more or less elongated, having the eyes upon a dilation 

 of their external base ; mouth without superior tooth, but fur- 

 nished with a spiral lingual band. 



Shell. Marine, found in almost all parts of the world, some 

 smooth, others knotted, spined, tuberculated, or undulated ; thick, 

 generally pearly, spire sometimes depressed, at others elevated and 

 pointed at the summit, sharp or carinated at its circumference, fre- 

 quently umbilicated, not always; aperture transversely depressed, 

 the margins not united at the upper part; columella arched and 

 twisted, often projecting forward; operculum horny, thin, with 

 numerous spiral whorls, increasing from the centre to the circum- 

 ference. Inhabits the European seas. Ninety -nine living species. 

 Eight fossil. 



Trochus imperialis. 

 T. longispina. 

 T. Solaris. 

 T. Indicus. 

 T. radians. 

 T. pileus. 

 T. calyptrseformis. 

 T. fimbriatus. 

 T. brevispina. 

 T. rotularius. 

 T. Stella. - 

 T. stellarius. 

 T. asperatus. 

 T. rhodostomus. 

 T. spinulosus. 



Trochus jujubinus. 

 T. Javanicus. 

 T. annulatus. 

 T. doliarius. 

 T. granulatus. 

 T. granatum. 

 T. moniliferus. 

 T. iris. 

 T. ornatus. 

 T. bicingulatus. 

 T. calliferus. 

 T. umbilicaris. 

 T. undatus. 

 T. Pharaonis. 

 T. sagittiferus. 



