Fig. 
22. 
33. 
34. 
35 
3M. 
38 
39. 
40. 
4] 
42. 
PLATE XIV. 
Cardiomorpha modioliformis, Avvg. Cast (natural size) of the left valve, showing 
impression of the ridge behind the anterior adductor 
muscular impression. ‘Tunstall Hill. 
Right aspect of a young testiferous specimen. Tunstall 
Hill. 
. Bakevellia ceratophaga, Schlotheim. Left valve (natural size) of a testiferous 
specimen. ‘Tunstall Hill. 
Right valve (natural size) of a testiferous specimen. Tun- 
stall Hill. 
Cardinal view, rather enlarged, of a testiferous specimen, 
showing cartilage-grooves. Tunstall Hill. 
Right valve (natural size) of a young (testiferous) specimen. 
Tunstall Hall. 
. Bakevellia antiqua, Wiénster. Left valve (natural size) of a smoothed testiferous 
specimen. ‘Tunstall Hill. 
Right aspect of the same shell. 
Cardinal view of the same, showing the cartilage pits. 
Left valve (natural size) of a testiferous specimen marked 
with striz of growth. Tunstall Hill. 
Left valve (natural size) of a young (testiferous) specimen. 
Tunstall Hill. 
Cast (natural size) of left valve, showing impressions of 
the anterior adductor muscles (a); posterior do. (4) ; 
and pallial line (ec). Humbleton Hill. 
Enlarged representation of the hinge-plate in gutta percha, 
showing the anterior teeth (a), and posterior do. (4). 
Original from Tunstall Hill. 
. Bakevellia tumida, Azzy. Cast (natural size) of the left valve. Humbleton Hill. 
36. 
Cast (natural size) of the right valve, showing impressions 
of the anterior, and posterior adductor muscles, and 
pallial line. Humbleton Hill. Professor Phillips’s 
specimen. 
Gutta-percha cast (rather enlarged) of the cardinal region, 
showing the cartilage pits on the area. The original 
is from Ryhope Field- House Farm. 
. Bakevellia Sedgwickiana, Aimg. Left valve (natural size) of a testiferous specimen. 
Tunstall Hill. 
Right valve (natural size) of a testiferous specimen. 
Tunstall Hill. 
Left valve (natural size) of a testiferous specimen. ‘Tunstall 
Hill. 
. Bakevelhia bicarinata, Avmg. Right valve (natural size) of a testiferous specimen. 
Tunstall Hill. 
Left valve (natural size) of a testiferous specimen. Tunstall 
Hill. 
