376 



VINE : MICRO -PALEONTOLOGY. 



Sub-genus BIGENERINA D'Orbigny. 



23 Bigenerina patula (?) Brady. Monog. Carb. and Perm. 



Foram., p. 136, pi. viii., figs. lo-ii, and pi. x., figs. 

 30-31- 



Examples apparently of this species I have from two English 

 localities, but after very careful study I place them here doubtfully, 

 especially so as Mr. Brady says (op. cit, p. 137): 'In England B. 

 patula has only been found in the saccammina-limestone of Elf Hills, 

 Northumberland.' 



Horizon a?id Locality. — Lowick (?), Northumberland; Castleton (?), 

 Derbyshire. 



Genus VALVULINA D'Orbigny. 

 = Tetraxitis Ehrenb. Textilaria (part) Ehrenb. 



24 Valvulina palseotrochus Ehrenb. 



Textilaria id. Ehrenb. (See Brady for other synonyms.) 

 ^ Livolutina cojiica Brady. (Young and Armstrong's Cat.) 

 Valvulina palcBotrochus Brady. Monog. Carb. and Perm. 

 Foram., p. 8*3, pi. iv., figs. 1-4. 

 This is the most abundant form that I have met with in the 

 Carboniferous Shales of England. Mr. Brady also remarks (op. cit. 

 p. 85) that this 'is perhaps the commonest and most generally diffused' 

 of all the smaller Carboniferous Foram inifera. 



Horizon and Localities. — Scaur Limestone : Castleton, Derby- 

 shire \ Arnside, North Lancashire; Redesdale, Skelly Gate, Northum- 

 berland. YoREDALE : Hurst, Yorkshire ; Gleaston Castle, North 

 Lancashire ; Fourstones, Ingoe, Northumberland. 



25 Valvulina palseotrochus var. compressa Brady. Monog. Carb. 



and Perm. Foram., p. 85, pi. iv., figs, ^-a^ b. 



By no means so abundant as the typical species. 



Horizon and Localities.— '$,ca\jr Lbiestone : Castleton, Derby- 

 shire ; Redesdale, Skelly Gate, Northumberland. Yoredale : Gleaston 

 Castle, Little Urswick, North Lancashire ; Ingoe, Northumberland. 



26 Valvulina decurrens Brady. Monog. Carb. and Perm. Foram., 



p. 87, pi. iii., figs. 17-18. 



' The outspread forms, of which Valvulina decurrens is the repre- 

 sentative, stand in somewhat the same relation to V. paloiotrochus as 

 that of Trochanimina incerta bears to the regular septate type of its 

 own group. In neither genus can any hard line of demarcation be 

 drawn between the successive "species'" (op. cit, p. 87). 



Horizon and Localities. — Scaur Limestone : Castleton, Derby- 

 shire, rather rare ; Redesdale, Skelly Gate, Northumberland. Yore- 



Naturalist, 



