BRITISH SILURIAN BRACIIIOPODA. 207 



a good state of preservation ; the usual dimensions of the Balcletchie specimens is 7 

 lines in length by G in breadth. A well-preserved example from Minuntion measured 

 9 lines in length by 6 in breadth. 



138. LiNGULA BREvis, PoHlock. Dav., Sil. Mon., PI. Ill, figs. 34—39; Sil. Sup., PI. 



XVII, figs. 26-30. 



This small fossil has been found by Mrs. R. Gray in the Llandeilo at Balcletchie, 

 Girvan; but it is more plentiful in the Middle Caradoc at Whitehouse Bay and 

 Shallock Mill in the Girvan District. The shell was also obtained by the Rev. P. B. 

 Brodie from the Lower Caradoc at Horderley in Salop. None of the specimens that 

 have passed through my hands exceeded some 3 or 4 lines in length. It is very ovate 

 in shape. 



139. LiNGULA GRANULATA, PMlUps. Dav., Sil. Mon., PL II, figs. 15 — 18 ; and Sil. Sup., 



PI. XVII, figs. 20, 21. 



"A fine square species, with granular line of growth, crossed by regular fine 

 rays."— Salter. " Cam. Cat.," p. 34. 



Several specimens, which I cannot distinguish from Phillips' type, were found by Mrs. 

 R. Gray in the Llandeilo at Ardmillan Brae, Girvan. On the internal cast of some 

 specimens may be seen a small longitudinal depression, similar to that observable in some 

 of the Dynevor Park examples. The Llandeilo in Scotland is very rich in forms of 

 Lingula^ no less than six species having been collected in the Girvan district by Mrs. 

 R. Gray. 



An uncertain specimen of Lingula ovata ? has likewise been met with by Mrs. Gray 

 at Drummuck in the upper zone of the Caradoc. 



Genus — Lingulella, Salter, 1861. 



" The earliest Lingula difiered from modern ones in having a groove under the beak 

 for the passage of the pedicle, and thus being more like Obolus" — Salter. "Cam. 

 Cat.," p. 8. 



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