26o PROC. COTTESWOLD CLUB vol. xiii. (4) 



occurs in the Httmphriesianus zone, it might be the an- 

 cestor, as its shape indicates. 



Oppel further remarks that Zieten's specimen differs 

 from most examples by being too much truncate in front. 



This species has lain in my cabinet some 20 years, with 

 the present specific name, indicative of its resemblance to 

 the German form. 



Note.—khoMX transverse ridges, see AI. tardecrcscens. 



Locality and horizon ."—Dorset, Bradford Abbas, Bed 5. 

 (Quart. Journ. Geol. Soc, Vol. xlix., p. 485). 



Date of Existence : — Garantiance hemera. 



15. ZEILLERIA FERRUGINEA, 5. Biukman, sp. n. 



PI. XIII., figs. 4a, b, c. 



Description : — Valves convex, outline of shell elongate. Front mar- 

 gin more or less rounded, and a little elevated. Beak acute, projecting, 

 with defined, acute ridges. Growth lines prominent at intervals. 



Comparison : — The elongate, non-plicate forms of the 

 Terebratulce of the pimctata and Btukmani groups are 

 homoeomorphs. One, a nev^^ species of the latter group, 

 occurs in the same bed. 



Remarks : — In the figured example the valves are separ- 

 ated by test deposition, which throws them further apart 

 without real increase of valve area. In some examples 

 this has been carried to an extraordinary excess. In most 

 cases there is not this thickening ; then the specimens have 

 a rather compressed appearance, and are not unlike what a 

 somewhat elongate, narrow Z. anisoclines might be. 



Distinction: — From Z . siibbucculenta (Chapuis and 

 Dewalque), more elongate ; more gibbous valves ; more 

 elevated beak, further separated from the umbo. 



Localities and Stratum- : — Dorset, Louse Hill, and Wyke 

 Quarry, near Halfway House, in the Irony bed. 



Date of Existence : — Blagdeni hemera. 



