240 PROC. COTTESWOLD CLUB vol. xiii. (4) 



forms, and generally to indicate the development of such 

 species. 



I will nov^ proceed with the description of some species. 



III. Independent Development of the 



MULTIPLICATE CHARACTER 



6^6'w?/^:— PSEUDOGLOSSOTHYRIS, 5*. Buckman. 



(Type : — Ps. ciirvifroiis, Oppel, sp.*) 



Defitiition : — Non-septate Terebratuloids, the beak stout, short, 

 without beak ridges, and generally with a large, complete foramen. 

 The brachial valve develops from flat to sulcate, with subsequent pro- 

 duction of a plica within the sulcus. 



Distinction : — From Glossothyris, the whole of the 

 brachial valve is involved in the making of a broad sulcus, 

 whereas in that genus only the middle third is taken to 

 make a kind of narrow linguiform depression. 



Remarks : — The following species belong to this 

 genus : — Leesi, S. Buckman ; simplex, J. Buckman ; cuTvi- 

 frons, Oppel ; Brebrissoni, Deslongschamps ; galeiformis, 

 }AcCoy\ provincia/is, Desk; all of the Ludwigian Age (lower 

 Inferior Oolite.) There is in the Harpoceratan Age (upper 

 Lias) a species, obviously a non-septate Terebratuloid, 

 hitherto confounded with Zeilleria (Waldheimia) Lycetti, 

 which may be expected to be a member of Pseudoglosso- 

 thyris. 



* I take as type of the genus the Cotteswold shell known as Terebratida, or Glossu- 

 thyris ? airvifrons, from the Oolite Marl. 



