NERITINA. 591 
Dr. Wolf found it in salt water. Pittier found it in Costa Rica on the banks of a 
stream submerged at high water. 
N.B.—There is an older fossil N. picta, Férussac, Hist. Nat. Moll. Terr. et Fluv. 
Fossiles, t. 2. figg. 4-7, Explication des Planches, p. 22, without description, published, 
according to Fischer and Crosse !¢, in 1825, and adopted by Grateloup in 1827 and 
Eichwald in 1830. But as the fossil species was renamed W. ferussaci by Récluz in 
1850 (Journ. de Conch. i. p. 154), and that of the recent one has been adopted by all 
subsequent authors, from 1832 to 1892, I prefer to follow the latter. 
9. Neritina fontaineana. 
Neritina fontaineana, d’Orbigny, Voyage Amér. mér., Moll. ii. p. 406, t. 76. figg. 14, 15 (1837—40)'; 
v. Mart. in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Neritina, p. 75”. 
Neritina guayaquilensis, Sowerby, Thes. Conch. ii. p. 520, t. 114. fig. 177 (1849) °; C. B. Adams, 
Ann. Lyc. Nat. Hist. N. York, v. p. 430 (1852)*; Reeve, Conch. Icon. ix., Nerita, t. 23. 
no. 104, fig. 1036° ; Carpenter Rep. Brit. Assoc. 1856, pp. 274, 322°; Stearns, Proc. 
U.S. Nat. Mus. iv. p. 332 (1891) ’. 
Shell subglobose, smooth, greenish, with black network and a broad dark band; spire obtuse; aperture broadly 
semilunar, yellowish. Diam. maj. 13-16, alt. 15-16, height of the aperture 12 millim. 
Hab. S. Panama: Panama, a little above highest tides, among sticks and leaves, in a 
muddy place overflowed with fresh water (C. B. Adams +). 
Ecuapor: Guayaquil, in brackish or salt water in the mouth of the river of the same 
name (Fontaine 1, Cuming °°). 
The habitat Payta, Peru, probably appertains to this species, but the other localities 
(Dr. Jones) mentioned by Stearns’, Bay of Montijo and Gulf of Nicoya, belong to 
N. latissima, var. intermedia (see anted, p. 469). 
As the form of the operculum of WN. fontaineana is not known, it is uncertain 
whether the species is nearest allied to V. virginea or to N. picta. 
The following marine species of Neritina have still to be noticed, but further 
information is required about both of them before they can be treated as belonging to 
the mainland fauna of Mexico or Central America :— 
Neritina pupa. 
Nerita exiguus nigrolineus ore subcroceo, Lister, Hist. Conch. t. 605. fig. 31 (1688) 
Nerita pupa, Linn. Syst. Nat. ed. 10, p. 878 . a | 
Neritina pupa, Sowerby, Conch. Illustr. no. 45, fig. 830°; Thes. Conch. ii. p. 530, t. 111. fig. 69°; 
Deshayes, in Lamarck’s Hist. Nat. des Anim. sans Vert. éd. 2, viil. p. 587°; Reeve, Conch. 
Icon. ix. fig. 63°; v. Mart. Malak. Blatt. xii. p. 65 (1865) "; ibid. in Martini & Chemnitz, 
Syst. Conch.-Cab., Neritina, p. 180, t. 2. figg. 11-13, t. 14. figg. 25, 26°; Fisch. & Crosse, 
Miss. Scient. Mex., Moll. ii. p. 488°. 
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