WORMS. TESTACEA. 00. Ncrita. 195 



bi)3. H. lutca. Suboval, dull orange, with about S whorls 

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



MoT.ia*uc Brit, Shells p. 383. t. 16 /. 6. 



S/ull nearly half* an inch long, fmooth ; the first whorl very 

 large: lip a little fprcad : refembles H. auricularia 2. but is iess r 

 noc fo tumid,- and thicker and stronger. 



501. II. laevigata. Flesh-colour, very obtuse, with 3 

 whorls ; the first very large and wide, the others 

 minute and placed laterally. 



Br. Zoo/. :. $&./. 139. Donovan tab. 105. 



S/W/ about the size of a pea, suborbieular, yellowiTh or tftddish 

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

 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. 



jG5. II. bulloides. Horn-colour, oval, smooth, glossy, 

 with 3 reversed whorls : aperture oval, 



Donovan' \j Brit. Shells, v- tab. 168. f. 2. 



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

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



60- NERITA. Ncrite. 

 56G. 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 : perforation deep, cloven. 



56T. N. glaucina. Smooth, with a rather obtuse spire t 

 umbilicus partly closed by the thick white reflected 

 lip. 



Br. Zool. t. 87./. 141. Donov. t. eo./. 1. Da Costa t. 5./. 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, tab. 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 ' r lip toothless, gibbous beneath : per/oration nearly closed 

 by the reflected lip. 



569. N.Jluviatilis. Suboval, rugged, imperforate: lips 

 toothless. 



Br. Zool. t. 87./. 142. Donov. t. 16./. 2. Da Costa, t. 3./. 17. 18. 



Shell 3 eighths of an inch long, generally white reticulately 

 marked or spotted with various shades of pink purplish or brown 

 sometimes with a spiral band or two, covered with a brown or 

 yellowish skin, under which it is glofsy or finely wrinkled : 

 whorls 3, the first very large, the spire obtuse : aperture nearly tbe* 

 whole length of the shell : pillar broad fiat, white : mouth covered 

 with an orange lid. 



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

 with a large umbilicus : aperture semilunar, much 

 spread. 



11 2 



