99 



Mr. Cuming in coral sand on the reefs at Lord Hood's Island, was found 

 to yield a rich violet juice. Many of the species are either borers or crawl 

 into the borings in shells and rocks of other mollusks ; and the foot of 

 these species, according to Mr. Woodward, is only feebly developed, whilst 

 the mantle-lobes are united, except for the passage of the small foot, and 

 for the siphonal orifices. The free-living species have, probably, a larger 

 foot, with more freedom of action. 



C. oblonga, the largest and most beautifully coloured species of the 

 genus, has been collected both at Australia and the Philippine Islands. 



1. angulata, Lam. 



2. coralliophaga, id. 



3. decussata, Reeve. 



4. Gruinaica, Lam. 



5. incaraata, Reeve. 



Species. 



6. laminata, Reeve. 



7. lirata, id. 



8. obesa, id. 



9. oblonga, Sow. 



10. rostrata, Lam. 



11. serrata, Reeve. 



12. Solenoides, id. 



13. vellicata, id. 



Figure. 



Cypricardia Guinaica. PL 35. Fig. 192. Shell, showing its opake 

 white pink-tinged substauce, with the cardinal teeth and remote shelf- 

 like lateral tooth. 



Genus 2. CARDITA, Lamarck. 



Animal ; with the mantle-lobes free, except between the siphonal 

 orifices; branchial margin with conspicuous cirri; foot rounded 

 and grooved, spinning a byssus. (Woodward.J 



Shell ; equivalve, very inequilateral, sometimes elongately oblong, 

 sometimes orbicular, strongly radiately ribbed ; hinge composed 

 of two oblique teeth in one valve, one of which is more or less 

 elongated according to the shape of the shell, interlocking with 

 a single corresponding tooth in the other. 



The animal of Cardita has been an object of as much contradictory cri- 

 ticism among malacologists as the Chameleon among travellers. M. Des- 

 hayes, following the observations of Poli and De Blainville, declares that 

 the mantle-lobes are disunited throughout their whole extent, and cannot 

 therefore have any siphonal perforations ; while Mr. Woodward, whose de- 

 scription, as being the more detailed, we have adopted above, asserts, that 



