WORMS. TESTACEA. 62. Patella. 191 



577 . P. ungarica. Entire, conic, longitudinally striate, 

 with a pointed hooked re volute crown. 



Br. Zool. t. go./. 147. Donov. t. i\.f. 1. Da Costa t. \.f. 7. 



Shell about aa inch wide, reddish or flesh-colour, often covered 

 with a hairy skin, fometimes tranfverfely plaited, within fmooth 

 rofy-vvhite ; margin often crenate : crown on one side, much 

 recurved. 



578. P. mititaris. Entire, white, conic, striate and 

 faintly reticulate, with a pointed hooked obliquely 

 recurved crown. 



Montague tab. 13,./. 11. Donovan tab. 1.71. 



Shell about half an inch wide, iinely striate both ways: crown 

 re volute, turning to one side : aperture nearly orbicular. 



579. P. intorta. Nearly entire, ferrug.nous, with, alter- 

 nately larger and lesser ribs: crown slightly re- 

 curved. 



Mr. Zool. tab. go. f. 148. Donovan tab. 146. 



Shell near an inch wide, covered with a ferruginous skin, gene- 

 rally decorticated at top, pale within, with numerous fubimbricate 

 ribs : aperture oval : margin entire or slightly toothed. 



580. P. lacustris. Very entire, oval, whitish, membran- 

 aceous, with a pointed recurved crown. 



Donovan tab. 147. Da Costa tab. z.f. 8. 



Shell a quarter of an inch wide, covered with a greenish or dusky 

 skin, fometimes slightly striate or tranfverfely wrinkled : crown 

 pointed, near one end. 



581. P. oblonga. Very entire, oblong, contracted in 

 the middle, horn-colour, with a pointed reflected 

 oblique crown. 



Donovan t. 150. Pkilos. Trans. 76. t. %.f. 1. 2. 3. 5. 



Shell a. quarter of an inch long, one tenth wide, covered with a 

 greenish skin : crown fmall, turning to one side, near the narrow 

 part of the margin. 



D. Entire, without the pointed crown. 



582. P.peUucida. Obovate, gibbous, pellucid, yellow- 

 ish-horn-colour with 4 blue rays of dots on one 

 side. 



Br. Zool. t. 90./. 150. Donov. t. 3./, 1. Da Costa t. \.f. 5. 6. 



Shell 3 quarters of an inch wide, more or lefs conic, fometimes a 

 little depressed with an obfeure crown, with 3-5 rays of blue dots 

 on one side from the crown to the margin. 



583. P. parva. Entire, ob long- orbicular, white with 

 reddish rays, finely striate* with the point of the 

 crown nearly marginal. 



Donovan tab. 21. f. 2. Da Costa tab. S.f. 11. 



Shell 3 eighths of an inch long, 2 eighths wide, mostly covered 

 with a dusky skin, circularly Wrinkled, Whitish or bluish, radiate 

 with reddish, more or less distinctly : crown obtufe ; margin very- 

 entire. 



584. P. bimaculata. Yellow, with an oblong blaek spot 

 at each end, oval, convex, depressed, with an, obso- 

 lete crown. 



Montague Brit. Shells, p. 482. tab. 1 3. JL S.< 



Shell a quarter of an inch long, an eighth wide, opak,e fmooth* 

 with a tranfverfe oblong black fpot at the fmaller end, and a lon- 

 gitudinal one aear the margin, within yellow ; marfintiiiih 



