CONCHOLOGY. 45 
A. corbuloides. A. ellipticum. 
A. glabrellum. A. subtruncatum. 
A. lucinale. A. solidum. 
A. Boysii. A. cordiforme. 
A. lenticulare. A. rupium. 
A. cancellatum. A. lamellosum. 
A. reticulatum. A. crenulatum. 
A. duplicatum. A. punctatum. 
A. leve. A. multicostatum. 
A. prismaticum. A. siculum. 
A. transversum.* A. orbiculata.* 
A. rubro-lineata.* A. equalis.* 
A. decisa.* A. punctata.* 
A. bellastriata.* A. radiata.* 
A. lepida.* 
FAMILY VI. 
Corsuracea. Two genera. 
1, Genus Cordula. 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. Pl. VI. 
Animal. Body much compressed, somewhat enlongated, in 
