﻿RHYNCIIONELLA. 



69 



has been found in the same beds and localities with Rh. primipilaris ; Phillips's original 

 term being preserved in the collection of Mr. Lee. 



RlIYNCIIONELLA ? PROTRACTA, Soil). PI. XIV, figS. 27, 28, 29. 



Atrypa protracta, Soiv. Trans. Geol. Soc, 2nd series, vol. v, pi. Ivi, fig. lfi, 1840. 

 Terebratula proboscidialis, Phillips. Palaeozoic Fossils of Cornwall, Devon, and 



West Somerset, p. 84, 1841. 



Spec. Char. Shell small, longitudinally oval ; valves moderately convex, and smooth 

 to within a short distance of the frontal and lateral margins, where a few small ribs origi- 

 nate, and extend to the margin ; about four or six of these ornament a small fold and 

 sinus, which become apparent only near the front, the remaining portions of the valves 

 being uniformly convex ; a dark line (indicating the presence of a longitudinal septum in 

 the interior) is likewise observable along the centre of the dorsal valve, and which extends 

 from the umbone to two thirds the length of the valve. The beak is of moderate size, 

 much incurved, and showing under its angular extremity a small circular foramen 

 surrounded by a deltidium. The ribs on the lateral portions of the valves are usually seven 

 or eight on each side, and exist only near the margin. Proportions variable ; two 

 specimens measured — 



Length 7|, width 7, depth 5 lines. 

 j> 6, » 5 2> ,j 4 ,, 



Obs. After having compared the original example of Atrypa protracta, Sowerby, now 

 in the Museum of the Geological Society, with Terebratula proboscidalis, Phillips, of which 

 the type forms part of the Museum of the Geological Survey, I arrived at the conclusion 

 that they both belonged to a single species, but I felt some uncertainty whether the 

 species should be referred to the genus Rhynchonella or Camarophoria. The specimens 

 were not sufficiently perfect ; or rather I could not examine the interior, whereby the genus 

 could be satisfactorily determined. 



Rhynchonella (?) protracta was discovered for the first time in the Middle Devonian 

 limestone, at the north side of Stone House Hill, near Plymouth, and afterwards in that 

 of Hope's Nose, near Torquay. 



Rhynchonella (?) Ogwelliensis, Bav. PI. XIV, figs. 23 — 26. 



Spec. Char. Shell small, pentagonal, valves moderately convex, with or without a more 

 or less distinctly marked Implication or triplication at or close to the front ; a small rib is 

 likewise present in some specimens on each of the lateral portions of the valve close to the 

 biplicated fold ; beak incurved. Proportions variable : length 3, width 3, depth 2 lines. 



