108 
MOLLUSC A. 
SoLEN, Lin. 
The shell only bivalve, oblong or elongated, but the hinge always 
furnished with salient and well marked teeth, and the ligament ex- 
ternal. In the 
SoLEN, Cuv., 
Or the Solens properly so called, the shell is cylindi’ically elon- 
gated, and has two or three teeth in each valve near the anterior 
extremity, where the foot issues, The latter is conical, and enables 
the animal to bury itself in the sand, which it excavates Avith con- 
siderable rapidity on the approach of danger. 
Several species are found along the coast of F ranee * * * § . 
We might distinguish those species in which the teeth a])proxi- 
mate to the middle; some of them still have a long and narroAV 
shell t- 
In others it is Avider and shorter; their foot is extremely thick. 
Tavo of the latter inhabit the Mediterranean In 
Sanguinolaria, Lam., 
The hinge is nearly the same as in the Avide Solens, and has tAA'o 
teeth in the middle of each A’alve ; but the tAVo latter, Avhich are oval, 
are much closer at the tAVo extremities, Avhere they merely gape, like 
certain Mactrse^. 
PsAMMOBiA, Lam. 
The Psammobiae differs from the Sanguinolariae, in having but a 
single tooth in the middle of one valve, Avhich penetrates betAveen 
tAA’o on the opposite one.|l 
PsAMMOTHEA, Lam. 
But a single tooth to each valve ; other Avise resembling the Psam- 
mobiae ^ . 
PholaS;, Lin. 
The Pholades have tAvo broad valves, convex toAvards the mouth. 
* Solen vaghm, Chemii., A'l, iv, 26 — 28 ; — S. siliqiia, Ib., 29 ; — S', ensis, Ib., 30; 
— S'. maTimtts, Ib., v, 35 ; — S. cuUellus, Ib., 37. 
-f- Solen leyumen, Chemn., VI, v, 32, 34. 
Solen sfriyilatus, Chemn., VI, vi, 41, 43; — S. radiatus, Id., v, 38— 40; — S. 
minimus, Ib., 31 ; — S. coarefatus, vi, 45 ; — S. vespertinus, Id., vii, 60. These two 
divisions have become the genus Solecurte of M. de Illainville. 
§ Solen sanyuinolentus, Chemn., A’l, vii, 56 ; — S. roseus, Ib., 55. 
II Tellini yari, L., Poli, 15, 23; — Solen vespertinus, Chemn., VI, 7, 59; — 
Psummolia maculosa, Lam., Egypt., Coq. pi. 8, f. 1; — Psamm. elonyaia,'Lum., 
Egypt., pi. 8, f. 2. 
^ Psammothea violacea, Lam., See. 
N. R. These two genera are united in one by M. de BLainville, called Psammocola. 
On the whole, they differ but very slightly from the Sanguinolariee. Great care is 
requisite in studying the shell, as the teeth are generally broken. 
