WORMS. TESTACEA. 67. Anomia, 



283 



Plicatella* Shell dilated lunate plaited, with longitudinally ftriate grooves, 

 the middle broader 

 Found hitherto in a foffile (late only. 



Shell flightly muricate at the fides, with longitudinal plaits; 

 back of the upper valve a little prominent. 



* Grifpa* Shell dilated triangular plaited with wrinkled grooves, the 



middle broader. 



Muf. Teff. tab. ^.fig. 7. Lift. Ahgl. ft 9./. 56. 



found in a foffile date in England and Switzerland. 



Shell nearly lunate, with 5 or 6 wrinkled arched iranfverfe grooves* 

 the fides flightly mucronate : beak of the upper-valve pro- 

 minent. 



'•Lacunofi. Shell round ifh with numerous grooves, the^ valves plaited at 

 the tip ; one of them (horter and pitted: the tip 4. 

 toothed. 



Lister an. Angl. p. 249. tab. 9. fig. 57. 



Muf Tef. tab. ^.fig.6. Grew. Muf. tab. i-fyfigi 6. 



Klein osU\ tab* il.fig. 57. 



Found hitherto in a foffile ftate only. 



Pubefiens* Shell dbovate grooved ; the beak of one valve prominent, 



of the other gaping, 

 Schrcet. Einl. in conch. 3. tab* g-fig. a, b. 

 Inhabits Norway Seas, on zoophytes. 

 Shell fmall, about the fize of a Cucumber feed, white nearly 



equivalve, covered with fmail ere6t diilant hairs which are 



probably a minute fpecies of fea weed, or fpunge, not retufe 



or plaited, longitudinally grooved. 



# Cufpidata Shell conic pointed grooved ; One Valve convex with an 



Incurved beak, the other pyramidal with a large trian- 

 gular foramen. 



Tranfacl. Linn. Soc Pol. 3* tab. 3. fig, 1— 4. 



Inhabits Derbyfhire, in a pctrifid ftate. 



Lower valve convex broad, wrought with clofe thick longitudinal 

 ribs and eroded 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 in which 

 place they are Undulate, the number of ribs above 29 ; beak 

 fmall pointed, and curved over the hinge t a ftraight line extending 

 the breadth of the (hell : upper-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 eroded by a few 

 ftrong difUnt wrinkles j the front or part extending from the 



N n 2 . hinee 



