BRITISH DEVONIAN BRACHIOPODA. 19 



Genus — Stringockphalus, Defrance, 1827. 



6. Stringocephalus Burtini, Def. Dav., Dev. Mon., PI. I, figs. 18 — 22; and PL II, 



figs. 1—11 ; and Dev. Sup., PI. Ill, figs. 2, 3. 



At page 11 of my Devonian Monograph (18G4) I fully described and illustrated this 

 important species. Since then specimens measuring different sizes, up to three inches in 

 length by five in breadth, have occasionally been found by Messrs. Lee, Champernowne, 

 and Whidborne, in the Middle-Devonian Limestone of Lummaton, near Torquay. This 

 characteristic species, therefore, marks the bed and the age of the numerous species that 

 accompany it. St. Burtini has also been found by Mr. A. Champernowne at Symonds- 

 Tree Quarry, as well as at Pit-Park and Orchard Quarries at Dartington. A young 

 specimen, with a large open fissure and median longitudinal groove in the dorsal valve, 

 similar to the one drawn by Professor Quenstedt, in Tab. 43, figs. 58 — 59, of his 

 • Brachiopoden,' 1871, has been met with in that locality by Mr. Champernowne. 



We may also mention what has already been recorded at p. 325 of the previous 

 volume, that the Stringocephalus-bed is in North Devon, according to Mr. Valpy, 

 situated above the Hangman Grits, and would constitute the basement of the " Ilfra- 

 combe Group," if that group is to be severed from the Hangman beds ? 



Genus — Renssel^eria, Hall, 1859, 



7. ? Renssel^ria Pstriatissima, Dav. Dev. Sup., PI. I, figs. 20, 20a. 



Shell marginally elongate-oval, nearly straight in front, no fold nor sinus ; valves 

 convex and covered with fine, radiating, raised striae, with shorter and smaller ones 

 interpolated between the larger striae ; beak moderately produced. 

 Length 11, width 8, depth 7 lines. 



Obs. — Nothing being known of the interior character of this shell, it is not possible 

 to assign to it its real generic position. It has been provisionally placed with Bensselaria. 

 Having forwarded drawings of the shell to Dr. Kayser, he does not think it can be the 

 Rensselaria strigiceps, F. Roemer, to which I thought it bore some resemblance. 



One specimen only was found by Mr. Whidborne in the Middle Devonian at Hope's 

 Nose, near Torquay. 



