Vol. 6^."] ON EULLERs'-EARTH BRACHIOrODA. 433 



Terebratula maxillata, Sowerby. 1 (PI. XXIX, figs. 3 a-3 c.) 

 1825. ' Mineral fonchology ' vol. v, p. 52 & pi. ccccxxxvi, fig. 4. 



Sowerby's figured specimen came from the Eullers'-Earth Rock 

 of jNunney, near Erome ; that figured in the present paper comes 

 from Whatley, near Erome, where it was collected from the Eullers'- 

 Earth Rock by the late J. F. Walker. 



Terebratuh spe^eroidalis, Sowerby (immature). 



Immature specimens of this shell, showing the flattened umbonal 

 region of the dorsal valve so characteristic of the young of the 

 species from the ' Top-Beds * of the Inferior Oolite of Dorset, are 

 by no means uncommon at the Doulting-Bridge and Earmcombe 

 Quarries. 



This form is not likely to be the young of T. doultingensis, 

 because, if it were, we should expect to find in the umbonal region 

 of the dorsal valve similar inflation. But we do not ; in fact, 

 just the opposite is the case — it is remarkably flat. 



Terebeatula globata, Sowerby, non auctt. 2 (PI. XXIX, figs. 4 a- 

 4 c.) 



T.f. 1825. 'Mineral Conchology ' vol. v, p. 51 & pi. ccccxxxvi, fig. 1. 

 Loc. of specimen figured in this paper : Whatley, near Frome (Somerset). 

 H. Fullers' -Earth Rock, Bathonian. 

 t]. subcontracti. 

 Colin. L. Richardson. 



Diagnosis. — Shell nearly circular, slightly pentagonal, longer 

 than wide, owing to the projection of the beak. The lateral margins 

 of the shell are sharp, and are curved to one-third of the anterior 

 margin of the shell, the remaining space being occupied by an 

 incipiently-biplicate fold which forms the anterior margin. Shell- 

 surface almost smooth, being marked only by indistinct lines of 

 growth. The ventral valve is less convex than the dorsal, sloping 

 towards the front margin. The sides of the valve form a gentle 

 curve to the centre, thence slope towards the* incipiently-biplicate 

 anterior margin. Beak large, and perforated by a large circular 

 foramen. Dorsal valve very inflated. 



Remarks. — The literary history of this species is most un- 

 fortunate. Mr. S. S. Buckman's timely researches have shown 

 that the true Terebratula globata of Sowerby is the form to which 

 my late colleague had given the MS. name of T. ivhatleyensis. 3 

 ' T. whatley ensis, Walker, MS.,' Sowerby's T. globata, is a very rare 

 shell indeed : not a common one, as it has been customary to suppose. 



Terebratula globata, Sow., was also confused with the same 

 author's c T. 9 bullata, until one of us (J. E. W.) discovered that 

 the latter had a long loop, as was indicated by a dark median 

 septum. 4 During the time when l T.' bullata was considered to be 



1 Note by L. Richardson. 



2 Paragraphs by L. Richardson. 



3 Ann. & Mag. Nat. Hist. ser. 7, vol. xx (1907) pp. 225-26. 



4 See Davidson's ' Monogr. Brit. Eoss. Brach.' Jurassic Suppl. p. 187. 



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