132 GENERA AND SPECIES. 



Panopaea. (GLYCIMERID&.) Plate xiv. 

 158. plicata, in. x J in. shell with a long gape at the posterior end. 



Patella. (PATELLIDJE.) Plate xxi. 

 324. vulgata, i in. shell a raised cone with radiating ribs. 



Of the five varieties of 324, picta is streaked with red and dark blue, intermedia has an 

 orange crown, depressa is rather flat and has the beak near to the anterior end, and carulea 

 is dark blue inside. 



Pecten. (PECTINID&.) Plate iii. 



33. pusio, if x if in. right hand ear of lower valve notched at 



base, 50 or more narrow ribs, alternately 

 large and small. 



34. varius, i x if in. right hand ear of lower valve notched at 



base, 25 to 30 equal sized prickly ribs. 



35. opercularis, 2% x 2^ in. ears nearly equal, 20 rounded ribs. 



36. septemradiatus, ij x i^ in. right i^and ear the larger, 7 rounded 



ribs, middle one the largest. 



37. tigrinus, f in. x 3^ in. striated, purple streaked and blotched, 



right hand ear of lower valve the larger. 



38. testa, % in. x ^ in. apparently smooth, but really striated, left 



ear of upper valve deeply notched. 



39. striatus, f in. x f in. finely ribbed, left ear of upper valve nearly 



entire. 



40. similis, ^ in. x J in. striated and mottled, ears long and drooping 



and rounded at the corner. 



41. aratus, fin. x fin. ears large, 32 rounded ribs with thin plates 



in interstices, inside furrowed. 



42. vitreus, ^ in. x f in. striated, ears broadly triangular, except the 



right one of lower valve, which is irregular. 



43. maximus, 5 in. x 4^in. upper valve nearly flat, and concave towards 



the beak. 



There is a white variety of 34, nivez ; and there is a white variety of 35, lineata ; the 

 latter having a thin brown line down the ridge of each rib ; of 36 there is also a white 

 variety. No. 43 is not the scallop shell of the pilgrims, that species has the ribs of the lower 

 valve angulated instead of round. The other varieties are of no importance. 



Pectunculus. (ARCADsE.) Plate i. 



16. glycimeris,2%in. x 2|in. shell round and white, zigzagged with browns 

 and purples. 



Petricola. (PET RICO LI D/E.} Plate x. 

 128. pholadiformis, ij in. x f in. thin, tumid, anterior side short. 



Phasianella. (TURBINIDM.) Plate xxii. 



355. pulla, ^ in. x in. many coloured, pointed at both ends, spire 

 short, operculum white. 



