BRITISH DEVONIAN BRACHIOPODA. 41 



31. Atrypa latilinguis, Schnur, sp. Dav., Dev. Sup., PI. II, figs. 9, da. 



Terebratula latilinguis, Schnur. Programm der vereinigten hohern Burger und 



Gewerbsch., 1851 ; and Beschreibungd. Eifel. 

 Brachiopoden, p. 183, pi. xxv, figs. 1 a—f, 

 1853. 



Atrypa reticularis, Kayser. Die Brach. des Mittel- und Ober-Devon. der Eifel 

 (Deutschen Geol. Gesel.), p. 543, 1871. 



Shell almost circular, about as broad as long ; valves very convex, ventral valve most 

 so, and slightly depressed near the front ; beak much incurved ; dorsal valve with a 

 slight mesial elevation or feebly defined fold commencing near the front. Front line 

 presenting a broad convex curve. Surface of valves marked with numerous fine radiating 

 riblets, nine or ten in the breadth of a quarter of an inch. 



Length 1^ inch, breadth about the same, depth 1 inch and 2 lines. 



Obs. — Pive specimens of this species were obtained by Mr. W. Vicary from a stone or 

 piece of Devonian limestone built into the wall of a house ; and Mr. Vicary informs me 

 that similar specimens were subsequently found in situ in the Middle Devonian at 

 Chercombe Bridge Quarry, near Newton Abbot. Mr. Vicary 's specimens were identified 

 by Mr. G. P. Whidborne vi'ith the t. latilinguis of Schnur, and quite agree with the figures 

 given by the German palaeontologist in pi. xxv of his work, as well as with some Eifel 

 examples obtained from the Eifel district by Mr. Whidborne. Dr. Kayser, at p. 543 of his 

 excellent work on the ' Eifelian Brachiopoda,' places Schnur's species among the 

 synonyms of Atrypa reticularis, Liniie, but I cannot concur in this identification, for the 

 English specimens and Schnur's figures seem to me to differ very much from Atrypa 

 reticularis in their shape and character. The umbo of the dorsal valve is much more 

 prominent, the ventral valve is so much more convex, and the bifurcating rays hardly 

 crossed by concentric markings are so much more regular, and seem to give a dififerent 

 facies to the shell. Many years ago these same specimens were shown by Mr. Vicary 

 to Mr. Salter, who wrote a label for them inscribed " Betzia new." Mr. Glass has deve- 

 loped the spirals in two German specimens, and found them to be arranged as in 

 Atrypa. 



