52 SUPPLEMENT TO THE 



Obs. — Mr. Champernowne found this Orthis in great abundance in calcareous shales 

 at Meadfoot, close under the Torquay Limestone, but generally crushed and out of 

 shape. We have named it after the distinguished Devonshire geologist, to whom we 

 are deeply indebted for much valuable help and information. 



48. Orthis (vel Strophomena) Champernownei, Dav. Dev. Sup., PI. Ill, fig. 18. 



Shell transversely oval, rounded anteriorly, wider than long; hinge-line straight, 

 shorter than width of shell; valves very gently convex, and much flattened; dorsal 

 valve divided by a slight longitudinal depression ; beak gently incurved ; area narrow. 

 Surface of valves finely striated longitudinally, with a smaller riblet between each pair of 

 the larger ones, and interspaces of about equal width. Interior not known. 

 Length 7, width 9, depth 2 lines. 



Obs. — Mr. Champernowne found this species in great abundance in calcareous shales 

 at Meadfoot, close under the Torquay Limestone, but generally much crushed and out 

 of shape. Not having seen any specimen in which the area was well preserved, I 

 cannot say whether it had an open fissure, as in OrtJds^ or a fissure covered by a deltidium, 

 as in Strophomena^ and consequently I am uncertain as to its genus. I have named it 

 after my valued friend Arthur Champernowne, Esq., of Dartington Hall, Totnes, and to 

 whom I feel deeply indebted for the liberal and zealous help he has given me in my 

 Devonian researches. 



Genus — Strophomena, Blainville, 1825. 



49. Strophomena rhomboidalis, var. nodulosa, Phillips. Dev. Sup,, PI. HI, fig. 15. 



LEPTiENA NODULOSA, Phillips. Pal. Foss. of Cornwall, Devon, and West Somerset 

 p. 56, pi. 24, fig. 94, 1841. 



At page TQ> of my ' Devonian Monograph,' while describing Strophomena rhomboidalis, 

 var. analoga, Phillips, I placed Phillips's Lcptana nodulosa as a synonym. Mr. Whid- 

 borne has suggested to me the possibility of Phillips's nodulosa being a well-defined 

 variety, if not a distinct species. Phillips states that with the general shape of his var. 

 analoga, its disc is flat from the beak to the border, and that the surface, irregularly 

 rather than concentrically ridged and furrowed, is radiated by extremely fine flexuous 

 striae, and adds, " I have always been much disposed to believe this distinct from the 

 last species \L. analoga"], and this opinion is rather strengthened by inspecting Mr. 



