CONCHOLOGY. 



3. Genus, ROSTELLARIA. 



Character. — Shell univalve, spiral, having the outer cheek 

 expanded (and united at the top of the mouth) to 

 the spire; the beak straight and plain, ending in 

 a point. 



Species. — Rosfellaria rubicunda; Shell ovated and slightly 

 tuberculated ; the mouth brown and striped ; the 

 spire and body of a dark red colour. 



Like the former Shell it is a Native of Amboyna ; 

 and is from the curious and interesting Museum of 

 Lord Valentia. 



4. Genus, TROCHUS. 



Character. — Shell pyramidicaliy shaped, spiral ; having 

 the rr.outh placed underneath, leaning sideways, 

 and of a quadrangular form ; the spire inclined to 

 the base. 



Species. — Trochus Apiaria; Shell white, striped with green 

 transversely and irregularly ; the sides and base 

 slightly rounded and tuberculated. 



This curious Shell is a Non-descript, and lately im- 

 ported from Botany Bay, a country which has afforded an 

 ample field of new subjects for the Conchologist. From a 

 Specimen in the Museum of Dr. Lettsom. 



