00 6EXUS MACLtRITE- #ufr, 



Genus *MACLU11ITE 



Generic CJiaracter, 



Sliell discoidal, mueli depressed^ unilocular; spire 

 iiot elevated, flat ; umbilicus very large, with a groove 

 formed by the projection of the preceding whorlg, hot 

 cyenulated^ 



^peciesi 



i. M. ^Jjiagna, Shell obtusely carinated on tlitf 

 exterioi' upper edge; UbliorU rapidly increasing in 

 feize ; tipertur^ on the left, irregularly oval, horizon- 

 tally depressed iiJbove ; lips not reflected. 



My Cabinet,.. Cabinet of the Academy, and of the 

 Philosophical Society, 



Plate iSf ^, 1. Upper surface df the M. magna 

 exhibiting flj the remains of the shell, b, the cast, e, 

 tliickness of the shell. 



Fig. S. A vertical section— fit, outer lip, 5, umbili- 



tUSi 



Fig. 3i Under part of the shell. 



2. M. bicarinuta. Whorls acutely cannated On 

 the middle above, and obsoletely carinated beneath ; 

 aperture on the right. 



Cabinet of the Academy. 



Parkinson- s Organic Remains, vol. 3^ page 76, pli 

 6, fig, 1 and 3. 



