Vol. 59.] A LOWER-GKEENSAND FOSSILIFEROUS BAND. 265 



Fig. 5. Tcrcbratula Boubei, d'Archiac. 

 Figs. 6 a & 6b. Tcrcbratula ovata, Sowerby. 

 Fig. 7. Terebratulina triangularis, Etheridge. 

 Figs. 8 a, 8 b, & 8 c. Zeilleria convexiformis, nobis. 

 9 a, 9 b, 9 c, & 9 a 7 . Magas (?) latestriata, nobis. 

 10 a & 10 b. Magas orthiformis (d'Archiac). 

 Fig. 11. Magas orthiforonis. A large round variety. 



Plate XVIII. 



Figs. 1 a & 1 b. Terebrirostra lyra, var. incurvirostrum, nobis. 



2 a & 2 b. Terebrirostra lyra, var. incurvirostrum, nobis. A smaller, 



curved specimen. 



3 a, 3 b, & 3 c. Terebratella Mcnardi, Lamarck, var. pterygotos, nobis. 



4 a, 46, & 4 c. Terebratella hercynica (Schloenbach). 



5 a, 5 b, 5 c, & 5 c?. Kingena, Newtonii, nobis. Fig. 5 <? is an enlargement 



of a portion of the shell, to show its granular surface. 



6 a & 66. Kingena Newtonii, nobis. Younger specimens. Fig. Qc (see 



explanation of fig. 5 e). 



7 a, 7 6, & 7 c. Bhynchonella lineata (!) var. mirabilis, nobis. 



8 a, 8 b, 8 e, & 8 d. Bhynchonella leightonensis, nobis. 



9 a, 9 b, & 9 c. Bhynchonella Grasiana, var. shenleyensis, nobis. 



Discussion. 



Prof. Seelet said that he had had the advantage of seeing 

 Mr. Walker's collection of fossils from this interesting locality. It 

 reminded him, in its general affinities, of the Faringdon fauna as 

 described by R. A. C. Godwin-AusteD. among which were some 

 fossils previously known only from higher horizons. In this deposit 

 the presence of Cardiaster and Catopygm,o£ Terebrirostra lyra, Tere- 

 bratula capillata, T.biplicata, and many other species, suggested the 

 horizon of the Upper Greensand ; though the brachiopods differed 

 as varieties from those hitherto known. But these fossils were 

 associated with some Lower-Green sand types, such as Terebratella 

 Menardi, and those also differed from the forms found in the Hythe 

 Beds of Kent. There were affinities which linked the fauna with 

 the other areas north of the Weald, rather than with those to the 

 south ; hut the cause of the mixture of faunas was not at present 

 explained. He would have preferred to limit the term Lower 

 Greensand to the southern deposit between the Weald-Clay and 

 the Gault, and to use Godwin- Austen's term Neocomian for these 

 northern beds, which extend from the Gault to a geological horizon 

 much older than the Weald. This fauna was a distinct addition to 

 the palaeontology of a rock which includes diverse assemblages of 

 fossils in its principal outcrops. 



Mr. Lampltjgh, on his own behalf and on that of his absent 

 colleague, thanked the Fellows for the reception accorded to their 

 paper, and Prof. Seeley for his kind appreciation of the work. He 

 thought that the term Neocomian should not be applied in the 

 broad sense desired by Prof. Seeley, as it was restricted in France 

 to one stage only of the Lower Cretaceous. 



Q. J. G. S. No. 234. t 



