CONCHOLOGY. 



45 



A. corbuloides. 

 A. glabrellum. 

 A. lucinale. 

 A. Boysii. 

 A. lenticulare. 

 A. cancellatum. 

 A. reticulatum. 

 A. duplicatum. 

 A. laeve. 

 A. prismaticura. 



A. transversum.* 

 A. rubro-lineata.* 

 A. decisa.* 

 A. bellastriata.* 



A. ellipticum. 

 A. subtruncatum. 

 A. solid um. 

 A. cordiforme. 

 A. rupium. 

 A. lamellosum. 

 A. crenulatum. 

 A. punctatum. 

 A. multicostatum. 

 A, siculum. 



A. orbiculata.* 

 A. equalis.* 

 A. punctata.* 

 A. radiata.* 



A. lepida. 



FAMILY VI. 



CoRBULACEA. Two genera. 

 1. Genus Corbula. PI. VI. 

 Animal. Unknown. 



Shell. Tolerably solid, regular, inequivalve, inequilateral with 

 a conical, flexed, ascending, primary tooth in each valve ; a cavity 

 at the side ; no lateral teeth ; ligament interior, placed in the 

 cavities ; two neighbouring muscular impressions. Inhabits the 

 British and American seas. Ten species. Four fossil. 

 Corbula Australis Corbula Taitensis. 



C. sulcata. C. nucleus. 



C. erythrodon. C. impressa. 



C. ovalina. C. porcina. 



C. semen. 



C. contracta.* 



2. Genus Pandora. PI. VI. 

 Animal. Body much compressed, somewhat enlongated, in 



