Vol. 52.] ON THE UPPER PORTION OF DUNDRY HILL. 703 



Differences from the shell now called Zeilleria anglica. — The valves 

 are much more convex in every way, especially towards the pos- 

 terior portion of the shell. The fossil therefore appears thicker, 

 with a more pronounced anterior slope than Z. anglica. The beak 

 portion of the perforate valve appears more pronounced aud curved ; 

 the beak too is itself larger, with more pronounced area and ridges, 

 and a decidedly larger foramen. This matter of the beak is a very 

 noticeable character, because the beak of Z. anglica is small and 

 delicate to a marked degree. 



Time of Existence. In the hemera scissi, or in that of opalhvus ; 

 but Zeilleria anglica lived during the hemera JSIurchisonce. 



Locality. Burton Eradstock, Dorset. 



Remarks. Deslongchamps, op. cit. pi. xlvii. fig. 7, shows the shape 

 as well as the usual size : in fact, the specimens are but little larger 

 than this. On the other hand, Z. anglica attains to twice this size. 

 Deslongchamps' fig. 7 also shows the character of the beak, and may 

 in this matter be suitably compared with Davidson's pi. A, figs. 10- 

 13. Deslongchamps' fig. 7 may be taken as representing Zeilleria 

 Oppeli with considerable fidelity. 



The faunal sequence at D unary shown by other classes of fossils 

 is given in Table Y a., facing p. 702. 



The following is a list of the species described by Whidborne 1 as 

 from the Inferior Oolite of Dundry, with the horizons, when they 

 are stated. It will be useful, as a supplement to the lists we have 

 given, to show what palseontological results have been yielded by 

 Dundry. We would, of course, remark that his Humphriesianum- 

 zone is evidently of somewhat wide interpretation ; but it may be 

 considered to be principally 'the Ironshot Oolite,' with certainly 

 beds above and below — in all probability strata deposited from the 

 hemera discitai until that of Garantiance. 



Dundry Mollusc a described by Whidborne. 



Area culmotecta, Whidborne. 

 * Astarte sufflata, Bomer. 

 t Cardium dundriense, Whidb. 

 t „ pulsatum, Whidb. 

 t Cypricardia filoperta, Whidb. 

 t Gervillia gladiolus, Whidb. 



„ intermedia, Whidb. 

 fGryphaa abrupta, Whidb. 



„ cymbium, 2 Lam. ' Humphriesiamcm-zone.' 

 t „ Sollasi, Whidb. 

 \Harpax Tawneyi, Whidb. ' Ironshot Oolite.' 



Hitinites tenuistriatus, Munster. ' Top of Humphricsianum-zone.' 



Lcda laeryma, Sowerby. ' .Base of Interior Oolite.' 



* Figured specimens. t Type-specimens. 



1 ' Notes on some Fossils, chiefly Mollusca, from the Inferior Oolite,' Quart, 

 Journ. Geol. Soc. vol. xxxix. (1883) p. 487. 



2 He notes that tbis is truly a Middle Lias fossil. This is evidently a case of 

 confusion of the Marlstone with the Ironshot Oolite. 



