The Genus Porosjohcera, Steinmann. By George J. Hindc. 9 

 of PorospHjEra obtained from the Zones of the English Chalk. 



Porosphasra 

 Woodward/. 



2 (12, 14 mm.) 

 1 (9 mm.) 



Porosphasra 

 pileolus. 



1 (7 mm.) 



2 (3 mm.) 



10(2-9 mm.) 

 2 (4 mm.) 



Porosphasra 

 patelliformis. 



2 (7-14 mm.) 



23 (7-17 mm.) 



1 (10 mm.) 



9 (2-11 mm.) 



22 (4-17 mm.) 



10 (5-18 mm.) 

 2 (7-13 mm.) 



4 (12-16 mm.) 

 2 (7-9 mm.) 

 8 (3-8 mm.) 



25 (7-18 mm.) 

 8 (7-13 mm.) 



11 (5-13 mm.) 

 2 (2-5 mm.) 



1 (7 mm.) 



4 (5-13 mm.) 



1 (13 mm.) 



3 (2-8 mm.) 



1 (10 mm.) 



3 (4-G mm.) 

 23 (2-il mm.) 



2 (1(5 mm.) 



2 (8-10 mm.) 

 1 (8 mm.) 



2 (14-17 mm.) 

 9 (3-15 mm.) 



22 (4-23 mm.) 

 3 (11-13 mm.) 

 10(7-11 mm.) 



1 (21 mm.) 



2 (10 mm.) 

 G (11-22 mm.) 



1 (7 mm.) 



3(2-5-13 mm.) 



3 (6-11 mm.) 



4 (8-12 mm.) 



Porosphasra Porosphxra. 

 arrecta. Irregular forms 



7 (3-0 mm.) 



1 (3 mm.) 



3 (6 mm.) 

 2 (3-G mm.) 



1 (7 mm.) 



5(1 5 mm.) 



3 (S-10 mm.) 



2 (7-9 'mm.) 

 5 (5-12 mm.) 



4 (7-12 mm.) 



1 (14 mm.) 



Totals. 



— 3 



8 

 19 



— 27 



34 

 43 



2 



82 



31 



G 

 — 37 



23 



50 



304 



2 



379 



2 



3 



58 



1 



3 



2 



G32 



34 



98 



118 



4G9 



51 



13 



4 

 G4 



83-: 



638 



SI 



172 

 40 



214 

 72 



1 



5 



181 



88 

 6 



22 

 1 



GS5 



117 



20 



2902 



