10 
Rhynchonella Leedsii , Walk. This species used to be con¬ 
founded with R. concinna, and 11 . varians. It is a globose 
species, the folds extending little more than half the length of 
the valves. This species occurs in the Cornbrash north of 
Scarborough. It is plentiful at Stilton, near Peterborough. 
Waldheimia ornithocepiiala , var. W. umbonella , Lam. This 
species is found in the Kelloway Rock of Scarborough Castle- 
Hill. It is a thicker and rounder shell than the typical W. 
ornithocepiiala from the Fuller’s Earth Rock. 
Rhynchonella socialis , Phil. R. varians pars. This species 
occurs in great numbers in the Kelloway Rock, it has also been 
found in the Oxford Clay of Scarborough Castle Hill, where it 
is rare. 
Waldheimia impressa , v. Buch. A single specimen of this 
species from the Bean collection is in the York Museum. It 
was named by Bean, Terebratula laevigata . It is from the 
Oxford Clay of Scarborough. 
Waldheimia bucculenta , Sow. This species occurs sparingly in 
the Passage-Beds of the Lower calcareous grit of Appleton 
near Melton. Mr. Walker has found it on the same horizon 
at Filey Brigg (B. d. fig. 13). 
Waldheimia Hudlestoni , Walk. This is a small narrow 
elongate ovate species, it occurs abundantly at Filey Brigg, 
(lower part of B. d. fig. 13,) also at Hackness, in an intercoral- 
line brash of a Lower Coral Rag which is about the same 
geological horizon. A large mass full of this species is in the 
York Museum. 
Terebratula Fileyeusis, Walk. 
A species formerly supposed to be T. globata ; it somewhat 
resembles some of Quenstedt’s figures of T. bisuffarcinata. It 
is found at Filey, principally in the Lower Passage-beds, (B. d. 
fig. 13,) and has been obtained at Snainton. Mr. Hudleston 
has found a single specimen in the Lower Calcareous Grit proper 
of Scarborough Castle-Hill. 
Rhynchonella Thurmanni , Voltz., part of R. varians. This is 
very abundant both in the Passage-Beds and in the Lower 
Calcareous Grit proper. It has been found at Filey, Appleton, 
Castle Howard, and many other places. 
