WORMS. TESTACEA. 67. Anomia. 283 
Plicatellas Shell dilated lunate plaited, with longitudinally ftriate grooves, 
-the middle broader 
Found hitherto in a foffile ftate only, : 
Shell lightly muricate at the fides, with longitudinal plaits; 
back of the upper valve a little prominent. 
* Crija. Shell dilated triangular plaited with wrinkled grooves, the 
middle broader. 
Muf. Teff. tab. c. fig. 7. Lift. Angl. t. 9. f. $6. 
Found in a foffile fate in Eng/asd and Switzerland. 
Shell nearly lunate, with 5 or 6 wrinkled arched tranfverfe grooves, 
the fides flightly mucronate: beak of the upper-valve pro- 
minent. 
© Lacunofa, Shell roundifh with numerous grooves, the valves plaited at 
the tip; one of them fhorter and pitted: the tip 4- 
toothed, — ' 
Lister an, Angl. p. 249. tab. 9. fig. $7. 
Muf. Teff. tab. 5. fig. 6. Grew. Muf. tab. 19. sig. 6. 
Klein ostr, tab, 11. fig. $7. 
Found hitherto in a foflile ftate only, 
Pubefcense Shell obovate grooved; the beak of one valve prominent, 
^ ofthe other gaping, 
Schret. Einl, in conch. 3. tab. 9. fig. a, b. 
Inhabits Norway Seas, on zoophytes. 
Shell fmall, about the fize of a Cucumber feed, white nearly 
equivalve, covered with ímail erect diitant hairs which are 
probably a minute fpecies of fea weed, or fpunge, not retufe 
or plaited, longitudinally grooved. 
? Cujpidata Shell conic pointed grooved; one valve convex with an 
incurved beak, the other pyramidal with a large trian- 
gular foramen. 
Tranfaét. Linn. Soc Vol. 3. tab. 3. fig, 1—4. 
Inhabits Derbyfhire, in a petrifid flate. 
Lower valve convex broad, wrought with clofe thick longitudinal 
ribs and croffed by a few flight concentric circles; the middle 
rib much larger, forming a convex ridge down the centre of 
the valve, increafing in breadth towards the margin :a which 
place they are undulate, the number of ribs above 29; beak 
{mall pointed and curved over the Ainge, a ftraight line extending 
the breadth of the fhell: wpper-valve pyramidal, gradually 
tapering to a fine point, the back rounded, longitudinally ribbed 
and indented with a deep concave groove, correfpondent to the 
ridge in the other valve; the groove and ribs croffed by a few 
ftrong diftant wrinkles; the front or part extending from the 
n2 hinge 
