42 SUPPLEMENT TO THE 



Genus — Pentamerus, Soic, 1813. 



32. Pentamerus biplicatus, Schnur. Dav., Dev. Mon., PI. XIV, figs. 31, 32 ; and 



Dev. Sup., PI. IT, fig. 22. 



At page 73 of my ' Devonian Monograph ' I figured and described a small specimen of 

 Schnur's species. Since then Mr. G. E. Whidborne has obtained from the Middle- 

 Devonian limestone of Lummaton, near Torquay, several much larger and better 

 examples, which agree in every respect with those described by the German author. 

 The largest specimen, of which I give a figure, measures one inch in length and breadth, 

 by three quarters of an inch in depth. Other examples have been also kindly lent to me 

 by Mr. Pengelly out of the Museum of the Torquay Society of Natural History. 

 P. biplicatus occurs in the same locality with P. brevirostris, the only other species of 

 the genus that has been hitherto discovered in our British Devonian rocks. This last- 

 named species is much less common in the dark shale at Hope's Nose, near Torquay. 



At page 537 of his valuable memoir, ' Die Brach. der Mittel- und Ober-Devon, der 

 Eifel,' 1871, Dr. Kayser considers Schnur's Pent, biplicatus to be a synonym of Pent, 

 galeatusy to which he would also refer the figures of the P. biplicatus which are represented 

 and described at p. 73, and PI. XIV, figs. 31 and 32, of my ' Devonian Monograph.' I 

 regret to feel obliged to diff'er from Dr. Kayser in this respect, and consider Pent. 

 biplicatus, Schnur, and Pent, brevirostris, Phillips, to be specifically distinct, and neither 

 to be referable to Dalman's species. The interiors of the dorsal valve in P. gulcalus and 

 P. brevirostris do not aaree. 



Genus — Rhynchonella, Fischer, 1809. 



33. Rhynchonella parallelepida, Bronn. Dav., Dev. Mon., p. iSQ, PI. XIV, figs. 



4 — G. (Not I'er. jorimipilaris,^on 

 Buch, according to Dr. Kayser). 



Teuebkatula pakallelepida (ncn Wilsoni var.), Bronn. Letbsea, p. 71, 1837. 

 Atetpa primtpilaris. Sow. (von Buck). Trans. Geol. Soc, 2nd ser., vol. v, p. 57, 



figs. 5, 6, 1840. 

 Teueb. — (1 ArcJiiuc et De Ferneuil. Trans. Geol. Soc, 2nd ser., vol. vi, 



p. 392, 1842. 

 — angulosa, Schnur. Bracl). Eifel, p. 18r», t. 25, fig. 5, 1853. 



