9 
Strophalosia Goldfussii — Spondylus id, Munster, Beitrage, 
vol. I. Humbleton, Ryhope Field House, Dalton-le-dale, 
and Tynemouth. 
Strophalosia Morrisiania , n. sp. Form roundish: marked 
with numerous fine broken lines radiating from the nucleus : 
area wide, and slightly elevated: dorsal valve roundly convex, 
irregularly-wrinkled longitudinally on the sides, with several 
longish spines adpressed and directed forward on the back, 
erect or directed backward on the umbone and sides: ventral 
valve somewhat concave: umbone small and much impressed. 
This species differs from all the Palliobranchiate shells, with 
which I am acquainted, in possessing a large intervalvular 
plate corresponding, in size, to the ventral valve. Humble- 
ton, Dalton-le-dale, Claxheugh, Ryhope Field House Farm, 
Tunstall Hill, and Tynemouth. 
Strophalosia spinifera, n. sp. Form roundish: area narrow 
and slightly elevated: dorsal valve roundly convex, with very 
long curved spines often somewhat arranged in lines radiating, 
and curving outwardly, from the nucleus: ventral valve con¬ 
cave, with very many declined longish spines having the same 
arrangement as those on the dorsal valve: umbone small, 
rounded, somewhat incurved, and slightly impressed. Should 
this shell be the Productus Cancrini , de Vern., my specific 
name will have to be cancelled. Perhaps it is the Orthis 
excavala of GeinitzP I have found it at Humbleton, Dalton- 
le-dale, Tunstall Hill, Hylton North Farm, Tynemouth, and 
Whitley. 
Ostrea (?) Tayloriana , n. sp. A very doubtful shell as to ge¬ 
nus ; and, until better specimens, than I possess, are examined, 
it must remain an imperfectly described species. Byers’ quar. 
Pec ten pusillus , Schl. Rather common. 
Monotis speluncaria , Schl. This species is found in all 
the localities mentioned, also at Black Hall rocks. 
Monotis radialis , Phill. Pecten id., Phill., “Encyclopaedia 
Metropolitana,” “Geology," pi. 3, fig. 5. 
Mytilus Hausmanni, Goldfuss.— M. acuminaius, J. de 
C. Sow. Rather common. 
B 
