SZ LINNEAN GENERA. 



transversely striated, taking a longitudinal direction across the 

 shell. One inch long, and from seven to eight broad. Com- 

 mon on most sandy shores of Europe. 



u 7i Length of the shell, v v breadth of the shell. 

 Solen Ensis. — The Sabre Solen. Plate V. fig. 5. Linear, a 

 little bent like a sabre ; with a single tooth and lateral lamina, 

 in one valve, locking into two teeth, and double laminse in the 

 other ; covered with a fine olivaceous, glossy epidermis ; one inch 

 long, and from five to seven broad. Inhabits the coasts of Eu- 

 rope. 



Solen Antiquatus. — The- Antiquated Solen. Plate II. fig. 

 1. Shell thin, white, and subpellucid ; moderately glossy, with 

 concentric striffi ; ends rounded and gaping : hinge near the 

 centre, furnished with a single tooth in one valve locking in be- 

 tween t\vo in the opposite, the teeth are erect, oblique, and stand 

 beyond the margin ; outside covered with an umber-coloured 

 epidermis. Found on the Cornwall and Dorsetshire coasts. 



I The cartilage, n inside, p margin or limb, q hinge. 



The Solens inhabit the ocean ; they are generally found buried about six 

 inches deep in the sand, into which they penetrate with great facility ; their 

 residence is known by a small dimple on the surface. In some places they 

 are used as food. 



Genus 6.— TELLINA. 



Animal a Tethys ; shell bivalve, generally sloping on one 

 side ; in the fore-part of one valve a convex, of the other a con- 

 cave fold ; hinge with usually three teeth, the lateral ones smooth 

 in one side. 



There are three families of the Tellinae : ovate and thickish,* ovate and 

 compressed,** snborbicular.*** 



Tellina fahula. — The False Tellina. Shell very thin, 

 pellucid and oval, generally of a dull yellow, and darker towards- 

 the umbo ; which is nearly central, pointed, and turned a little 

 to one side ; the anterior side slopes to an obtuse point ; the 

 posterior side is large and rounded ; binge furnished with three 

 teeth in one valve and two in the other. 



I Cartilage, q q hinge. 



TeUitia I)o7iacina. — The Donax-like Tellina. Plate V. 

 fig. 6. Suboval, flattish, much sloping on the anterior side, semi- 

 striated, and semi-pellucid, hinge with two teeth in one valve, 

 and one in the other, pale yellow ; longitudinally radiated with 



