304 ‘Lamarck’s Genera of Shells. 
solenaca or myaria. The shells gape but very little, if at all, 
at the lateral extremities; the cardinal teeth are seldom di- 
verging, and we never find three on the same valve. They are 
shore shells. 
N. Sorenarra. (3 genera.) 
1. Sanguinolaria *. 
Shell transverse, subelliptical, slightly gaping at the lateral 
extremities; superior margin arched, not parallel to the lower; 
two approximate cardinal teeth on each valve. 
The sanguinolarie are distinguished from the solenes by the 
superior margin not being parallel to the inferior; they also 
gape but little at the lateral extremities. 
Type. Sanguinolaria rosea+. (Solen sanguinolentus. Gimel.) 
Shell semi-orbicular, slightly convex, white; mates rose- 
colour, transverse strie arched. 4 Species. Jamaica. Pl.v. 
Fig. 43. 
2. Psammobia f. 
Shell transverse, elliptical or oblong oval, rather flat, slightly 
gaping at both sides; beaks prominent. . Two cardinal teeth 
on the left valve, and only one entering tooth on the opposite 
valve. 
The form of the Psammobiz approaches nearer to that of the 
tellinee, than of the solenes; but, besides gaping at the sides, 
they have not the irregular fold, on the anterior side, of the for- 
mer, although they frequently have an angle or fold, of the 
same form, or the anterior side of both valves. 
Type. Psammobia feroensis §. (Tellina fereonsis. Gel.) 
Shell oblong-ovate, delicately striated transversely; white, 
painted with rosy rays; area of the anterior angle decussately 
striated. North Seas. 18 Species. Pl. v. Fig. 44. 
3 Psammotea|}. 
Shell transverse, oval, or oblong oval, slightly gaping at 
* From sanguis, blood. 
+ Rosy—Lamarck’s second species. His type is S. occidens. 
} From ¥appoc, sand, and fios, life. 
§ Of Ferroe. Lamarck’s second species. His type is P. virgata, 
{| From Yapemoiloc, arenosus, sandy. 
9 ae 
