151 
CUCULLjEA, De Lamarcke . 
Gen. Char. Bivalve equivalved, inequilateral, 
subtransverse, ventricose. Hinge rectilinear 
furnished with a series of transverse interlock” 
ing teeth., and terminated by two or three 
parallel transverse plates. Cartilage external. 
This is another Genus separated from the Linnasan Genus 
Area, and of which I presume we shall find many species. 
CUCULLiEA glabra® 
TAB. LXYIL 
Spec. Char. Rhomb oidah anterior angle obtuse, 
posterior edge of the front rounded; surface 
covered by fine longitudinal lines decussated 
by the lines of growth: teeth of the hinge 
deeply striated. 
Syn. Cucullaea glabra? Park. Org . Bern. 171. 
out slightly ventricose, and without any very prominent 
angle; about one-fourth wider than long; beaks rather 
incurved; the surface to which the cartilage of the hinge 
is attached is marked with four diverging cuts, and the 
line of the hinge finely reticulated. 
These Biackdown specimens, so much externally resem- 
bling some Area of Linnaeus, help to caution us against 
