470 MOLLUSCA. 
N. latissima, but all are attributed to H. Cuming. In my monograph of Neritina™ 
(pp. 74, 290) this species is stated to occur on both the Pacific and Atlantic slopes of 
Central America; but this was probably a mistake, owing to my being unaware at the 
time of the true position of the Rio Chiriqui. This river, I now find, rans into the 
Pacific, near Cape Burica, on the borders of Costa Rica and the State of Panama. 
Nevertheless, there is a specimen of NW. intermedia in the Dunker collection labelled 
“ Chiriqui, N. Panama,” on the authority of Méschler, a dealer who received many 
shells from missionaries. 
The shell of this species, like that of many others, is usually rnarked with small pale 
spots, which are bordered at the side towards the aperture by somewhat broad black 
lines; when the spots are very numerous and crowded, they give it a reticulated 
appearance. In some specimens the spots are nearly or quite absent. In others there 
are two black spiral bands, which look as if they were produced by an enlargement 
of the black borders into two spiral zones. Varieties of this kind are mentioned 
by Broderip himself! in WV. datisstma, and I have seen also banded forms of the 
var. intermedia from Chiriqui. 
H. Pittier mentions that this species is called by the natives “sit cuah,” 7. é. small 
“ sit.” 
2. Neritina punctulata. 
Nerite, Argenville, Hist. Nat. Conchyliologie, éd. 1, p. 259, t. 10. fig. 3 (1742) *; éd. 2,t. 7. fig. 3°; 
éd. 3, par Favanune, t. 61. fig. D1’. . 
Neritina punctulata, Lamarck, in Encycl. Méth. Vers, 11. t. 455. fig. 2*; Sowerby, Conch. Illustr., 
Neritina, sp. no. 6, fig. 29°; Thes. Conch. ii. p. 520, t. 105. fig. 194°; Deshayes, in 
Lamarck’s Hist. Nat. Anim. sans Vert. éd. 2, vi. p. 584"; Menke, in Zeitschr. f. Malak. 
1850, pp. 166, 167°; Shuttleworth, in Bern. Mittheil. 1854 (Diagn. neuer Moll. vii.) p. 161°; 
Reeve, Conch. Icon. ix., Neritina, t. 10. fig. 48"; v. Mart. in Malak. Blatt. xii. p. 54 (1865) ”; 
in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Neritina, p. 76, t. 5. figg. 18-15"; 
Strebel, Beitr. Mex. Land- und Siissw.-Conch. i. p. 59, t. 1. fig. 38"; Fisch. & Crosse, 
Miss. Scient. Mex., Moll. ii. p. 472, t. 58. fig. 5 (operculum) “. 
Neritina fuscilabris, Wiegmann, MSS. in Mus. Berol.™. 
Neritina aperta, Budgin, Sowerby’s Catalogue coll. Earl of Tankerville, p. 45 (1825) ™. 
Neritina pulligera (Lam.), Deshayes, in Cuvier’s Régne Anim. éd. 3, Illustrée, Moll. t. 47. fig. 1”. 
Shell rather flat, with very wide aperture; last whorl covering nearly all those preceding, and usually leaving 
an eroded spot only, instead of the spire; suture very irregular towards the aperture. Outside 
olivaceous-brown, with very numerous pale spots; in some specimens with one or two broad pale spiral 
zones. ‘The callous deposit on the columellar area more or less distinctly extended upwards at the outer 
extremity. 
Hab. E. Mexico: Rio de Misantla, near Misantla (Deppe & Schiede™; Strebel"); 
Rio de Colipa, in the district of Misantla (Ziebmann 8). 
ANTILLES: Cuba (d’Orbigny, Gundlach) ; Jamaica (C. B. Adams, Reeve ); Puerto 
