184 MOLLUSCA. 
Beck? and Pfeiffer 12 give Peru as a locality, but this has not been confirmed by 
subsequent writers. Cuming’s specimen figured by Reeve 13 ig apparently the same as 
that figured by Sowerby ?; but the former gives Nicaragua, the latter Conchagua (in 
the republic of Salvador) as the locality ; the difference, however, is not great, as the 
Volcan de Conchagua is near the frontier of Nicaragua. 
Generally the streaks are very broad and dark in the middle part of the last whorl, 
becoming narrower in the lower part and bifurcated in the upper third of the same 
whorl; at the limits of these three parts the streaks are often angulated. There is, 
however, much variation in this respect. The variety fischeri approaches O. obductus. 
2. Ortalichus ferussaci. (Tab. X. figg. 8-10.) 
Cochlea vesicaria fluviatilis exotica, &c., Seba, Thesaurus, iii. t. 39. figg. 54, 55 (1761) *. 
Zebra miilleri, Chemnitz, Conch.-Cab. ix. 2, p. 24, t. 118. figg. 1015, 1016 (1786) °. 
Helix undata, Férussac, Hist. Nat. Moll. Terr. et Fluv. t. 115. figg. 1, 4 (living animal) °; Tabl. 
Syst. p. 48. no. 337 (part.) *. 
Bulimus undatus (Brug.), Pfr. in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Bulimus, p. 7 
(part.), t. 2. fig. 5 (copy from Chemnitz) °. 
Orthalicus ferussaci, v. Mart. in Monatsber. Akad. Wiss. Berlin, 1863, p. 542°; Malak. Blatt. xu. 
p. 42 (1865) 7; Die Binnenmoll. Venez. p. 82, t. 1. fig. 6 (1873) °; Pfr. Monogr. Helic. 
Vivent. vi. p. 199°; Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 447"; Strebel, 
Beitr. Mex. Land- und Siissw.-Conch. v. pp. 18-23 (form A, form B, in part, and form C), 
t. 2. figg. 1 c, d, e, 8a, b, 4a, b, 5a, 6 a-d, 7, 8, 9a, b, t. 10. figg. 2, 6 (jaw), 17 (anatomy), 
t. 12. figg. 4 and 5 (radula) "; Pilsbry, Proc. Ac. Phil. 1891, p. 317”. 
Orthalicus zebra, Mousson, in Malak. Blatt. xvi. p. 179 (part.) (1869) *. 
Orthalicus princeps, Stoll, Guatem. Reisen, p. 430 ™. 
Hab. S.W. Mexico: Tehuantepec, on a species of Tabernemontana, belonging to the 
family Apocynee (Deppe® *). 
Yucatan: Shkolak and Tekanto (fledlprin ¥*). 
N. Guatemaa: Panzos, in the Polochic valley (Conradt); Vera Paz (Stoll). 
CenTRAL GuaTEMALA: San Gerénimo (Champion) ; Zacapa, on a species of Cereus, 
in the treeless region (Stol/ 1*). 
Nicaragua: Acoyapa (Belt). 
N.W. Costa Rica  faanacaste (Pittier). 
Cotomsia : Region of the lower part of the R. Magdalena, in holes in tree-trunks, 
not higher than six feet above the ground (Wallis18); Santa Marta (G@ross- 
kopf +); Rio de la Hacha (Wessel 11); Savana Grande at Santa Marta and 
valley Cosai (Sievers) ; Sierra Nevada, on the trunks of Hecastophyllum dubium, 
family Papilionacee, and at Urumita in the Cordillera de Los Andes (Sievers). 
VENEZUELA: Near the Lake of Valencia (Moritz 1°); Caracas (Lansberg !°); Angos- 
tura, on the Orinoco (Gruner 1°), 
Guiana (Schomburgk 1°), 
Ecuapor: San Juan de la Costa (ftiess 1). 
