!)8 



BRACHIOPODA. 



6. MAGAS. 



Shell with a reflected loop attached near the bend to a veiT 

 prominent central septum (figs. 9-12). 



Magas, Soiverby, 1816, Min. Con. ii. p. .39. t. 119. 



Dav. 1852, Mon. Cret. p. 19; Ann. Nat. Hist. 1852, p. 371. 



D'Orb. Ter. Cret. 1847, iv. p. 54. 

 Terebratulae spiriferinse (part.), Querist. Handh. p. 476. 

 Terebratula, E. 1, Blainv. Man. Malac. p. 512. 



Figs. 9 & 10. Magas pumila. 

 Fig. 9. Fig. 10. 



Fig. 9. — Interior of dorsal valve. 



Fig. 10. — Section of both valves : s. septum ; I. loop ; o. oral processes. 



Figs. 11 & 12. Magas Evansii. 



Fig. 11. 



Fig. 12. 



Fiij. 1 1 . — Section of dorsal valve. 



Fig. 12. — Front view of interior. 



In M. pumila the reflected portions of the loop are not united, 

 and the deltithum consists of two nan'ow plates bordering the 

 auffular foramen. 



1. M.A.GAS CRENULATA. 



Shell suborbicular, pale horn-colour, with radiating ribs ; mar- 

 gins crenulated ; beak short, slightly reflected ; hinge-area large 

 and flattened ; foramen large, nearly complete ; deltidia large. 



