NERITINA. 473 
Hab. Sovru-rastern Unrrep Srarzs: Alabama, S. Carolina, Florida. 
E. Mexico: Tampico (coll. Dunker); Rio de Tecoluta, with the typical form 
(Deppe & Schiede !° 8); Vera Cruz, with the typical form, but only one specimen 
(Strebel 2°) ; San Carlos, one specimen among four globose ones ([T6ge). 
E. Guatemata: Rio Dulce, at Livingston (S¢ol/). 
ANTILLES: Cuba (d'Orbigny *4 ; Pfeiffer > ; Gundlach). 
This is the prevailing form in Florida and Cuba, where specimens are also found 
approaching more or less closely to the typical NV. lineolata, which is the commonest 
form in Mexico. 
Var. reticulata. (Tab. XXVIII. fig. 7.) 
Nerita reticulata, Lister, Hist. Conch. t. 605. fig. 28 (1688) *. 
Neritina reticulata, De Cristofori et Jan, Catalogus Rer. Nat. 1832, p. 7°"; Mantissa, Cat. p. 4° 
(nec N. reticulata, Sowerb. P. Z. 8. 1832, Reeve, &c.; nec reticulata, Quoy et Gaimard, 
1834 = dubia, Chemn.). 
Neritina reclivata, var. reticulata, v. Mart. in Martini & Chemnitz, loc. cit., Neritina, p. 120, 
t. 10. fig. 16”; Fisch. & Crosse, loc. cit. p. 481, t. 58. figg. 3, 3a”, 
Neritina verriculum, Récluz, in litt.* . 
The black lines forming a regular network, and somewhat thicker and less numerous than in the typical form. 
General shape varying between globose and conoidal. 
Hab. ©. Mexico: Tampico (coll. Dunker); Vera Cruz, with the typical form (coll. 
Dunker ?®). 
British Honpuras: Belize (Mus. Berol.*® ; Bocourt ?°). 
K. Guatemata: Lake of Yzabal (Stoll); Rio Dulce, at Livingston (Stol/). 
ANTILLES: Cuba, especially at Manzanillo, where it is the predominant torm, and in 
the Rio Cauto, where it has been found among a larger number of the var. 
reclivata (Gundlach, in Mus. Berol.); Jamaica °°. 
Some individuals show a transition from the reticulated to the lineated form. (See 
Tab. XXVIII. fig. 1.) 
Among twenty-two examples from Florida, now before me, there is not one with 
reticulated coloration. 
Var. parcepicta,n. (Tab. XXVIII. figg. 1, 3, 4, 5.) 
Neritina reclivata, var. striolata (Récluz), v. Mart. in Martini & Chemnitz, loc. cit., Neritina, 
p. 120 (part.), t. 18. fig. 12. 
The black lines thicker and fewer in number, and somewhat widely separated. 
Diam. maj. 15, min. 19, alt. 17 millim. 
“ S. 5 Shy 5 9, Ware- col. 6, lat. areze 3 millim. 
Hab. E. Guaremata: Rio Dulce, at Livingston (Stol/). 
This is an individual variation rather than a distinct variety, as specimens are some- 
times found with the regular network of the var. reticulata, passing by degrees into the 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, Hebruary 1900. 60 
