NERITINA. 



Plate XXYIII. 



Species 13-i. (Fig. «, b, iMus. Cuming.) 



Neritina Pekrotettiana. Ner. testa ovatd, suhdepressa, 

 spird vix exsertd, obtusd, anfractibus superne coiwavo- 

 impressis, deinde convexis, lavibm, ared colitmellarl 

 htiuscnld ; carboHario-nigrd. 



Perkotett's Neritina. Shell ovate, somewhat de- 

 pressed, spire scarcely exserted, obtuse, whorls cou- 

 cavely impressed on the upper part, then convex, 

 smooth, columellar area rather broad ; coal-black. 



Recluz, Pro. Zool. Soc. 1S41, p. 3.37. 



Hab. Ceylon; Dr. Gardner. 



A smooth, coal-black, rather depressed species, but 



little smaller in size than the accompanying figure. Tlie 



inscription, " considerably enlarged," in the opposite Plate, 



should be " slightly enlarged." 



Species 125. (Fig. a, b, Mus. Cuming.) 



Neritina fluviatilis. Ner. testa obloiigo-ovatd, spird 

 parvd, perspicue convolutd, anfractibus subatujmtis, 

 IcBvibus, nitentibtis, ared columellari latiusculd; nigri- 

 cante-molaced, macuUs albis reticulate aspersd. 



The fluviatile Neritina. Shell oblong-ovate, spire 

 small, perspicuously convoluted, whorls rather nar- 

 row, smooth, shining, columellar area rather broad ; 

 blackish-violet, sprinkled with a network of white 

 spots. 



Nerilajliwiatilis, Linneeus, Syst. Nat. 12th edit. p. 1253. 

 Neritina Balmatica, Partch. 



Hab. Elvers of France and England. 



A rather narrow oblong species, painted with pale 

 blackish-violet, splashed ivith white subelongated spots. 



Species 126. (Fig. a, 4, Mus. Cuming.) 



Neritina Listeri. Ner. testd suhglobosd, spird obtuse 



planatd, anfractibus convexis, lavibus, ared columellari 



callosd, tumidd ; lutescente-olivaced, lineis nigris Jlexu- 



osis confertis pictd. 



Lister's Neritina. Shell subglobose, spire obtusely 



llattened, wiiorls convex, smooth, colnmellar area 

 callous, swollen ; yellowish-olive, painted with close- 

 set flexuous black lines. 



Pfeiffer, Sowerby, Thesaurus Coneh. part 10. p. .534. 



Ilab. St. John's River, Nicaragua. 



A subglobose, rather callous species, very i 

 ith close-set fle\uous black lines. 



ally painted 



Species 127. (Fig. a, b, Mus. Cuming.) 

 Neritina 1>aconi. Ner. testd .mboblongo-ovatd, spird 

 subexserlii, ohliisil^ anfractihns convexis, concentrice 

 stria/is, iii/('i////iin. (irrii i-uhiniellari subcallosd ; sor- 

 dide ciiien/v, iiigni iint niiciilafd aut Jle.vuoso-Uneatd. 

 Bacon's Neritina. Shell suboblong-ovate, spire slightly 

 exserted, obtuse, whorls convex, concentrically stri- 

 ated, shining, columellar area rather callous ; dull 

 ash-colour, reticulated or ilexuously lineated with 

 black. 

 Ilab. Swan River ; Dr. Bacon. 



Somewhat resembling the preceding species in respect 

 of its linear variety of painting, but of a more spirally co- 

 noid form, and uarrouer. 



Species 138. (Fig. a, b, Mus. Cuming.) 



Neritina Guinerii. Ner. testd depresso-orbiculari, spird 

 obtuse planatd, anfractibus angustis, versus aperturam 

 lalioribus, spiraliter lineari-sulcatis, aperturd rotun- 

 dato-expansd, ared columellari declivi ; carbonario- 

 nigrd. 



GuiNEit's Neritina. Shell depressly orbicular, spire 

 obtusely flattened, whorls narrow, broader towards 

 the aperture, spirally linearly grooved, aperture ro- 

 tundately expanded, columellar area slanting ; coal- 

 black. 



Recluz, Sowerby, Thesaurus Conch, part 10. p. 541. 



IM. 



Distinguished by its pinched compre; 

 round expanded aperture. 



ed spire and 



January, 185G. 



