40 
anterior portion. Its beak is also peculiarly long, overhanging 
and incurved, and its beak ridges are not sharply defined. Its 
base is not thickened, but is acute. It is narrower and longer, 
and altogether of slighter build. 
Waldheimia Witchelli occurs in the Oolite Marl at Notgrove 
Station, and is at present very rare. (I name this species in 
compliment to my friend, Mr E. Wircnett, F.G.8., of Stroud, 
to whom I am indebted for much kindness and assistance.) 
Dovvittt, in a paper on “Certain Genera of Brachiopoda,” 
in the Bulletin de la Société géologique, Vol. VII, 1878-1879, pp. 
251—277, considers that the generic name Waldheimia should 
be restricted to that group of which Waldheimia flavescens, 
Lamarck, sp., is the type, and he divides the rest of the 
Waldheimie into several genera. I have previously seen the 
discrepancies which existed between certain Waldheimie of the 
Oolite rocks and the type Waldheimia flavescens, and I certainly 
agree in their being separated. 
Dovvitii* proposed the name Aulacothyris for those Waldhei- 
mic with a furrow in the dorsal valve, and selected, as his type, 
Aulacothyris resupinata, Sow. Bayxe,t on the other hand, had 
proposed the name Zeilleria for those with more or less indented 
bases, his type being Zeilleria cornuta, Sow. Dovvin1e includes 
in Zeilleria such species as the one before us, and W. Leckenbyi, 
Wanker, would naturally belong to the genus; but at the same 
time certain specimens which I have not yet seen my way to 
separate from Wald. Leckenbyi occur with it, having a slight 
median furrow. There occur also varieties of Wald. Anglica, 
Opren., and Wald. Dorsetensis, Watxer, with this median 
furrow, of which I possess specimens in my collection; see also 
Davipson Brachiopoda, sup., Plate XXIV, fig. 8, (but Ap. 
to sup. Plate XX, fig. 159) Derstonescuames, Brachiopodes, 
Plate LXII, fig. 8, gives a drawing of a specimen of (he says) 
Wald. carinata, without a median furrow; and I have specimens 
in my collection very much resembling Wald. carinata, but 
* “ Douvillé, Brachiopodes, Bulletin Soc. géol. de France,” 3rd series, t. 
VII, p. 251. 
+ “Bayle, Explication de la Carte géol. d. 1. France,” Plate IX. 
