WORMS. TESTACEA. 60. Nerita. 195 



563. 11. lutea. Suboval, dull orange, with about 3 whorls 

 ending in an obtuse spire : aperture oval, very wide. 



Montague Brit, Shells f. 380. t. 16 /. 6. 



Skell nearly half an inch long, finooth ; the first whorl very 

 large : tip a little fpread : rcfembles H. auricularia 2. but is less, 

 not fo tumid, and- thicker and stronger. 



56i. H. la-oigaia. Flesh-colour, very obtuse, with 3 

 whorls ? the first very large aud wide, the others 

 minute and placed laterally. 



Br. Zool. t, 86. f. 139. Donovan tab. 105. 



Shell about the size of a pea, suborbicular, yellowifh or reddish 

 flesh-colour, very thin and brittle, pellucid, with the fmaller 

 whorls placed laterally and hardly raifed, finely striate longitudi- 

 nally and wrinkled transversely, often covered with a thick brown 

 skin: aperture very wide and rounded, thin, within whitish or 

 or purplish-brown. 



565. H. bulloides. Horn-colour, oval, smooth, glossy, 

 with 3 reversed whorls : aperture oval. 



Donovan's Brit. Shells, v- tab. i68./. 2. 



Shell 3 eighths of an inch long, dark horn-colour, brittle, 

 obtuse ; the first whorl very large but not-much inflated. 



60- NERITA^. Nerite. 



566. N. Canrena. Smooth, with a slightly raised and 

 pointed spire, and gibbous cloven umbilicus. 



Donovan's Brit. Shells, v. t. 167. N. intricata. 



Shell about the size of a hazel nut, whitish, with yellowish or 

 ferruginous zigzag marks spirally disposed : aperture wide, semi- 

 circular : per/oration deep, cloven. 



567. N^glaudna. Smooth, with a rather obtuse spire: 

 umbilicus partly closed by the thick white reflected 

 lip. 



Br. Zoot.t. 87. /. 141. Doncv. t. BO./, i. Da Costa t. $./. 7. 



Shell about half an inch long, white, grey, reddish or livid, with 

 generally a chain of zigzag short bluish or chefnut lines round the 

 futures of the whorls ; spire obtuse, a little pointed : aperture 

 roundish-lunate. 



568. N. Mammilla. Oval, smooth, white or yellowish : 

 umbilicus nearly closed by the reflected lip : aper- 

 ture oval. 



Donovan Brit. Shells, tub. 144. N. nitida. 



Shell about half an inch long, polished, oval-oblong, .with a 

 short spire, the sutures of which are nearly obliterated : aperture 

 oval ; lip toothless,, gibbous beneath : -perforation nearly closed 

 by the reflected lip. 



569. N.fluviatilis* Suboval, rugged, imperforate : lips 

 toothless. 



with an orange lid. 



570. N. paVddula. Yellowish horn-colour, smooth, 

 with a large umbilicus : aperture semilunar, much 



spread. 



R 2 



