11 
TELLINIDEs.—Shell transverse, inequilateral, rather flat, slightly gaping at the sides; 
beaks small and rather depressed, without the irregular fold on the margin. Hinge 
with two diverging teeth in each valve. Two lateral teeth, almost obsolete; the 
posterior of which in one valve is near the cardinal teeth. 
Plate VI. Fig. 1. (a) T. rosea. 
(4) Inside of ditto. 
Corsts.—Shell transverse, equivalve, without any irregular fold on the anterior margin, ° 
having the beaks opposite and curved inwards. Two cardinal teeth; two lateral 
teeth, the posterior of which is nearest the hinge. The muscular impressions 
simple. 
Plate VI. Fig. 2. (a) C. fimbriata. (Venus fimbriata.--Linn.) [Mrs. Mawe’s Cabinet. ] 
(b) Hinge of ditto. 
Lucina.—Shell suborbicular, inequilateral; beaks small, pointed, and oblique; two di- 
verging cardinal teeth, one of which is bifid, and which vary or disappear with 
age; two lateral teeth, sometimes obsolete, the posterior approaches nearest to 
the cardinal teeth; two muscular impressions, very separate, the posterior extend- 
ing in the shape of a band, sometimes very long. Ligament external. 
Plate VI. Fig. 3. (2) L. Jamaicensis. (Venus Jamaicensis.—Chem.) 
(6) Inside of ditto. 
Donax.—Shell transverse, equivalve, inequilateral, the anterior side very short and very 
obtuse; two cardinal teeth, either in both valves, or in one only; one or two late- 
ral teeth, more or less distant. Ligament external, short, inserted in the place of 
the lunula. 
(a) Internal margin entire, or nearly so, 
Plate VI. Fig. 4. (a) D. cuneata. (Idem.—Gmel.) 
() Inside of ditto, 
(6) Internal margin crenulated or toothed. 
Plate VI. Fig. 5. D. trunculus. (Idem.—Chem.) 
II. — Havine No LATERAL TEETH, 
Capsa.—Shell transverse, equivalve, close: hinge having two teeth in the right valve, and 
one entering bifid tooth in the other; no lateral teeth. Ligament external. 
Plate VI. Fig 6. (a) C. levigata. (Donax levigata—Chem.) 
(b) Inside of ditto. 
Crasstna.—Shell suborbicular, transverse, equivalve, rather inequilateral, close: hinge 
with two strong diverging teeth in the right valve, and two very unequal teeth in 
the other. Ligament external, on the longest side. 
Plate VI. Fig. 7. (a) C. Danmoniensis. (Venus Danmoniensis.— Montagu.) 
