PLATE XIV. 
. Mytilus squamosus, J. de C. Sow. Right valve (natural size) of a testiferous 
specimen. ‘Tunstall Hill. 
a — Dorsal aspect of a testiferous specimen, natural size. 
Tunstall Hill. 
— — Left valve of a testiferous specimen, natural size. Tunstall 
Hill. 
— = Left valve of a testiferous specimen, natural size. 
Silksworth. 
— — Dorsal view of a cast, natural size. Humbleton Hill. 
So Cast ; left valve showing impressions of pallial line, and pos- 
terior adductor muscles. Mr. KE. W. Binney’s specimen. 
= == Dorsal view of the last specimen, showing impressions of 
the posterior adductor muscles (a); posterior visceral 
ditto (4) ; and anterior adductor ditto (c). 
. Mytilus septifer, Avg. Right valve of a testiferous (smoothed) specimen, natural 
size. Souterpoint. 
— _— Left valve (natural size) of a testiferous (smoothed) speci- 
men. Souterpoint. 
a — - Left valve; young specimen. Cast, rather enlarged. 
Roaker Rocks. 
— = Cast; left valve (natural size) showing impressions of the 
anterior adductor muscle (a); posterior ditto (4); and 
pallial lime. Byers’s Quarry. 
— — Ventral view of a cast. Byers’s Quarry. 
— _ Cast of the hinge (twice the natural size), showimg im- 
pressions of the cartilage grooves. ‘Tunstall Hill. 
. Edmondia Murchisoniana, Avg. Right valve (testiferous), natural size. Tunstall 
Hill. 
== — Left valve (natural size) of a testiferous specimen. Tun- 
stall Hill. 
a oo Cast; natural size; right valve. Humbleton Hill. 
== — Dorsal view of thé last specimen with the umbones removed, 
to show the pair of subjacent cartilage fulcra (a). 
. Cardiomorpha modioliformis, King. Left view of a testiferous specimen, natural 
size. Tunstall Hill. 
— — Dorsal view of the same shell. 
ae aa Right valve (natural size) of a smooth variety. Tunstall 
Hill. 
== aa Left valve (natural size) of an angulated variety. Tunstall 
Hill. 
