GASTEROPODA. 



145 



from that of Trochus, but there are no filaments at the 

 sides. — 10 species. 



Brought from Java, India, New Holland, &c : the shell 

 differing from Stomatia principally by the raised rib at 

 the back. 



Broderipia. Gray. (Scutella Brod.) — Shell minute, 

 somewhat like a Patella; the apex inclined near 

 the posterior margin: aperture oval, very large, 

 and very pearly, two long oval muscular impres- 

 sions at the side. Animal and operculum unknown. 

 — 3 species. 



Found in the South Seas ; at the Philippines, &c. 



ANATOMUS. Montf. (Sissurella U Orb. ) — Shell small 

 and delicate ; spire small : last whorl large, the 

 surface striated; aperture rather round, and 

 having a narrow slit near the middle of the 

 outer lip. Animal (according to a written de- 

 scription of Sars) very like that of Trochus. — I 

 also fossil. 



Small shells, some quite microscopic, found in the Me- 

 diterranean, also in the seas of Xorway and Britain, where 

 they have been found off the Zetland islands. 



Pleurotomaria. Dej ranee. — Shell turbinated, spiral ; 

 aperture nearly square, with rounded 

 angles ; outer lip with a deep slit or 

 notch near the middle, from which a 

 band is continued round the whorls, 

 formed by the slit being continually 

 filled up ; no canal as in Pleurotoma. 

 — 400 species, all fossil. 



These shells are only known in the 

 fossil state ; they resemble Trochus in form, but are dis- 

 tinguished by the slit in the outer lip. 



L 



«pecie: 



Pleurotomaria anglica. 



