44 On the Amj)hihious Volutes. 



marked by darker transverse bands on tbe body whorl ; the 

 spire is much thicker in proportion than that of the next; 

 and the whole shell is larger. 



SjJ. 2. C. parva. Plate VII,, fig. 3. 



Shell ovate, thin, light, covered with an epidermis ; spire 

 slender, pointed ; pillar plaited ; first close to the top of 

 the aperture; the second more towards the base. 



Inhabits with the last, but is much smaller, more slender, 

 and the plaits proportionately much larger. 



Sjy. 3. C. sohda. Plate VII., fig. 2. 



Shell small, solid, glossy, white, tinged with pink or 

 fulvous ; body whorl large ; spiral whorls small, the tip 

 rather obtuse ; pillar with three unequal plaits, the first very 

 large. Inhabits shores of Flinder's Island. 



This, from its comparative weight and substance, appears 

 to be strictly a marine shell, and seems to connect the two 

 preceding with Pedipes, from which genus the shell difi'ers 

 only in having no teeth on the outer lip. 



As a further illustration of this intricate family, I shall 

 now describe three species of Rhodostoma, a genus in which 

 the characters of Melampus and some of those belonging 

 to Tour7iatella are united. The first is very remarkable, 

 and the two others, I believe, have been overlooked. 



Rhodostoma corrugata. Plate VII., fig. 4. 

 Wrinkled Pinkmouth. 



Shell oblong- ovate, somewhat coniform, body whorl with 

 prominent waved interrupted wrinkles. Spire very short, 

 conic, smooth, margin of the aperture orange. 



Inhabits Cape York, (?) Australia, 



