12 



GEOLOGICAL MEMOIRS. 





1 



pq 



3 



a 



1 



.A 



'3) 



1 



1 



1 



CO 



■a 

 1 



1 







— 







— 



— 



— 







liffnarius 





trunculus 



Tritonium corrugatum 



Chenopus pes graculi 





Strombus coronafus 





Buccinum gibbosulum 



semistriatum 



Ascanias 







reticulatum 



TQutabile 





Terebra dwolicata 



Mitra cornea 





Rinfficula auriculata 





Conus Brocchii .... 





Dentalium sexangulum 



dentalis 



entalis 





stvitttwiTi .•••••• 





perforatus 







From the localities above referred to, which for convenience sake 

 I will designate as Central Sicily, there are on the whole 124 species, 

 of which only 40 (32 per cent.) are unknown as Mediterranean 

 species, and only 35 (28 per cent.) are absolutely extinct. 



If we take the separate localities, we find at 



• 



Total species. 



Species not now in Medi- 

 terranean. 



Species now extinct. 



Buccheri 



Caltagirone 



41 

 14 

 36 

 40 

 18 

 21 



14, or 34 per cent. 

 5, or 38 „ 

 12, or 33 „ 



8, or 20 



9, or 50 „ 

 5, or 25 „ 



12, or 30 per cent. 



4, or 30 „ 

 10, or 29 „ 



6, or 15 „ 

 9, or 50 „ 



5, or 25 „ 



Caltanissetta 



Girgenti 





Syracuse 





