NERITINA. AT5 
Novtilvin ipa : ‘s 
ri ne vi saned:, Sowerby, Thes. Conch. ii. p. 590 (part.), t. 116. fig. 232°; Reeve, Conch. Icon. 
1x., Neritina, t. 21. fig. 92.¢‘; d’Orbigny, in Ramon de la Sagra’s Hist. fis. polit. y nat. de 
- Cuba, Moluscos, p. 174 (part.) °; Gloyne, in Journ. de Conch. xx. p. 37 (1872) °. 
Neritina virginea, var. listeri, v. Mart. in Malak. Blatt, xii. p. 62 (1865) "; in Martini & Chemnitz, 
Syst. Conch.-Cab. ed. 2, Neritina, p. 123, t. 14. figg. 1-3, 10°. 
Neritina listeri, Pfr. in Archiv f. Naturg. vi. p. 255 (1840)°; Shuttleworth, Mittheil. nat. Ges. 
Bern, 1854 (Diagn. neuer Moll. vii.), p. 160"; Tate, in Amer. Journ. of Conch. v. p. 155 
(1870) *. 
Larger and more globose than the typical form, yellowish-green (bleached violet), with crowded zigzag lines 
and scattered small white black-edged spots. Columellar plane white, more or less yellow or even orange 
outwards. 
Diam. maj. 223, min. 14, long. 21, marg. col. 124, lat. ares 94 millim. 
Hab. E. Nicaragua: throughout the river San Juan, at the rhizomes of aquatic plants, 
very abundantly, but also in Greytown harbour with Planorbis tumidus (wyldi?) 
at localities where the water is alternately brackish and fresh, according as to 
whether the tide is flowing or ebbing (Tate 11). 
ANTILLES: Cuba (Pfeiffer®; d’Orbigny®; Gundlach’); Puerto Rico (Blauner °) ; 
Jamaica (Riise®; Gloyne ®). 
This is the freshwater variety of the well-known J. virginea, which is more common 
in brackish water, but there smaller, more vividly and variously coloured, with less 
distinct periostracum, according to the observations of d’Orbigny®, Gloyne®, and 
Gundlach 8. 
Dubious Species. 
Neritina sargi. 
Neritina sargi (Staudinger, in litt.), in Paetel’s Cat. Conchylien-Sammlung, ed. 4, p. 527 (1888)’; 
Crosse & Fisch. Journ. de Conch. xl. p. 296 (1892)°*; Miss. Scient. Mex., Moll. ii. p. 475, 
t. 58. figg. 6, 6a-d’. 
Hab. ? GuaTeMaLa?™. 
Fischer and Crosse suggest that this so-called species, quoted as from Guatemala 
(Sarg) in Paetel’s Catalogue, may be a young shell of the subgenus Alina; but having 
examined the operculum of one of Paetel’s specimens, | find that the apical apophysis 
is scarcely developed, as in the subgenus T’heodoxus, which chiefly comprises European 
forms, and-is not known from the New World. As there are numerous mistakes in the 
localities quoted in the above-mentioned Catalogue, the Guatemalan habitat must be 
regarded as doubtful, though Mr. Sarg resided for many years in Guatemala. 
Neritina pulchra. 
Neritina pulchra, Sowerby, Conch. Illustr. no. 57. fig. 59°; Thes. Conch. ii. p. 539, t. 112. 
figg. 89, 907; Deshayes, in Lamarck’s Hist. Nat. Anim. sans Vert. éd. 2, vili. p. 589°; 
Récluz, Journ. de Conch. i. p. 151*; Reeve, Conch. Icon. ix., Neritina, t. 25. fig. 111’; 
60* 
