Spirifer antarcticus Morris and Sharpe 



Fig. I Ventral cardinal view of a shell without deltidiiim, but 

 with apical callus 



2 Similar view of an old shell with deltidium 

 Locality: Port Louis, East P^alkland 



3 Enlargement of surface 

 Locality: Jaguariahyva, Brazil 



4 Enlargement of surface 

 6, 7 Dorsal valves 



8 Exterior of a large individual 



9 Internal cast of the same valve 

 Locality: Port Louis, East Falkland 



Spirifer hawkinsi Alorris and Sharpe 



Fig. 10 Dorsal valve 



II Dorsal side of an internal cast 



Locality: Port Louis, East Falkland 



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