ORTALICHUS, 185 
This species is chiefly characterized by the combination of streaks and spiral bands. 
Some specimens come very near to the young state of 0. princeps; and others to 
O. undatus, Brug., from the Caribbean islands and Florida, which, however, is ordinarily 
more elliptically elongated, and has paler, rather bluish-livid, bands and streaks. 
O. Stoll describes the living animal as follows :—Body 6 centim. long, rather bulky ; 
back coarsely wrinkled and as warty as that of Helix pomatia, brownish-grey, the 
furrows darker coloured. Upper feelers finely wrinkled, bluish-grey, 17 millim. long, 
their anterior extemity swollen, ochraceous-yellow; eyes black. Lower feelers pale 
grey, 45 millim. long; anterior extremity also swollen and ochraceous-yellow, without 
eye. Face 9 millim. high, 7 broad, convex. Hinder part of the foot flat, pointed, 
without median crest. 
3. Ortalichus tricinctus. (Tab. XI. fig. 8.) 
Helia undata, Férussac, Hist. Nat. Moll. Terr. et Fluv. t. 115. figg. 3, 5 (living animal) '; Tabl. Syst. 
p-. 48, no. 837 (part.) ’*. 
Bulimus (Orthalicus) zebra (Mill.), Beck, Index Moll. p. 59°. 
Orthalicus zebra (Mill.), Shuttl. Notitize Malac. p. 61, t. 8. figg. 3,4‘; Pfr. Monogr. Helic. 
Vivent. iv. p. 589°; H. & A. Adams, Gen. Moll. t. 75. fig. 6 (living animal, copied from 
Férussac) ° ; Mousson, in Malak. Blatt. xvi. p. 179 (part.) (1869) 7. 
Orthalicus princeps, Morch, in Malak. Blatt. vi. p. 112 (1859) *. 
Orthalicus melanochilus (Val.), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 458, t. 18. 
figeg.5,5 a”. 
Orthalicus ferussaci, Form B, 1, Strebel, Beitr. Mex. Land- und Siissw.-Conch. v. pp. 21, 22, 
t. 2. figg. 2 a—d, t. 9. figg. 12, 13, t. 11. fig. 6 (radula), t. 10. figg. 8, 5 (jaw) **. 
Hab. Cuntrat America, either Nicaragua or Costa Rica (Orsted $). 
Nicaracua (Lévy ®). 
N.W. Costa Rica: Bay of Salinas, in mangrove bushes near the sea (Pittier). 
S.W. Costa Rica: Quebrada (ravine) del Vijaqual, in the valley of the Rio Saveyre, 
at an elevation of 150 metres (Pittier); woods at Terraba, at an elevation of 
250 to 270 metres; Alto de Mano Tigre, 690 metres; Boruca, at an elevation 
of 450 metres; El Pozo, 50 metres, common in clear primeval woods (Pittier) ; 
Costa Rica, without nearer indication of locality (Carmiol, in mus. Berol.). 
CoLtomBiA: Santa Marta (Grosskopf!°); Barranquilla and on the borders of the 
R. Magdalena (Wallis? 1). 
Ecuapor: San Juan de la Costa (Reuss 1°), 
Peru: R. Marafion ( Warscewiez). 
This species has been confounded with the North-Mexican 0. melanochilus, from 
which it differs in the more ovate and thinner shell, and the ordinarily well-defined 
three dark brown spiral bands, the uppermost, however, is in some specimens very pale 
and thin, or wanting altogether; in the latter character it approaches O. ferussaci. 
BIOL. CENTR.-AMER., Terr, and Fluviat. Mollusca, dugust 1893. 24 
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