﻿CRETACEOUS BRACHIOPODA. 



49 



Pebble-bed of Godalming. Specimens have also been obtained from the Sponge-gravel 

 at Faringdon. In England T. pseudo-jurensis appears to occur in the Lower Greensand 

 (== Aptian or Upper Neocomian). It is stated by Alcicle d'Orbigny, in his Paleontologie 

 Francaise,' that on the Continent T. pseudo-jurensis characterises the Lower Neocomian, 

 is abundant at Auxerre (Yonne), in the Blue Marls of Saint-Dizier, and at Brettancourt 

 (Haute-Marne), also at Morteau (Doubs), and at Neuchatel in Switzerland. 



61. Waldheimia tamarindus, Soto. Dav., Cret. Mon., PI. IX, figs, 26 — 31. 



In his paper, " Ueber die Brach. aus dem Unteren Gault (Aptien) von Ahans in 

 Westphalen." (' Abdruck aus d. Zeitsch. deutsch. Geol. Gesellschaft/ p. 336, 1866), 

 Dr. U. Schloenbach, jun., enters into lengthened details to show that W. tamarindus 

 should be referred to the genus Megerlia. He gives at p. 368 an illustration of the 

 loop ; but the drawing is evidently incorrect and in no way shows that the shell 

 is really referable to the genus to which he refers it. In a subsequent paper by 

 Mr. C. A. Meyer in the ' Geol. Mag.,' vol. v, p. 268, 1868, a correct description and 

 figure of the loop are given, which show that it is prolonged to near the front before 

 becoming deflected, and is in no way attached to the central septum. The shell is conse- 

 quently a true Waldheimia. Spinose projections are likewise observable on the edge of 

 the loop in some aged examples. 



At Upware the species has attained much larger dimensions than in the Isle of 

 Wight : and Mr. J. F. Walker has described and figured the species from the first-named 

 locality under the following varietal designation : 



62. Waldheimia tamarindus, var. magna, Walker. Sup., PI. VI, figs. 16 — 19 a; and 



PI. VII, figs. 5—9 a (?). 



Terebratula tamarindus, Sow., -var. magna, Walker. Geol. Mag., vol. v, pi. xix, fig. 



10, 1868. 



Waldheimia tamarindus, as was correctly observed by Mr. Walker, varies considerably 

 in form ; some specimens assume a somewhat pentagonal shape, while others are more 

 globose and thickened at the margin ; so that the Upware examples differ principally from 

 those of the Isle of Wight by their larger size, some specimens having exceeded an inch 

 in width and length, and two thirds of an inch in depth. Internal casts, of great beauty 

 and completeness, occur in the same locality, showing in the most perfect manner the 

 shape and position of the muscular impressions. 



Mr. Meyer doubts very much the occurrence of W. tamarindus in the Upper 



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