108 _ MOLLUSCA: 
somewhat a transition to d (olivaria), which I can judge. only from the description and 
figure given by Fischer and Crosse. - The jocality given | Say joapied by later writers) 
is “* Mexico” }. 
4. Omphalina caduca. A | 
Helix caduca, Pfr. in Malak. Blatt. iii. p. 158 (1846)*; in Martini & Chemnitz, Syst. Conch.- 
Cab. ed. 2, Heliz, ii. p. 100. no. 518, t. 88. figg. 26-28°; Monogr. Helic. Vivent. i. p. 89°, 
and iv. p. 74‘; P. Z.S. 1856, p. 324, t. 35. fig. 13°; Ferd. Romer, Texas, p. 455 (1849) °; 
Reeve, Conch. Icon. vii., Melia, t. 97. fig. 530’; Binney, Terr. air- breath. Moll. N. Am. 
p. 107 °. 
Hyalina (Ammonoceras) caduca (Pfr.), v. Mart. in Albers’s Die Helic. ed. 2, p. 72”. 
Hyalina caduca (Pfr.), Tryon, Am. Journ. Conch. ii. p. 248, t. 18 (3). fig. 15”. . 
Zonites caduca (Pfr.), Binney & Bland, Land and ‘Fresh-water Shells of N. Am. i. p. 286, 
fig. 513". | Sots aon | 
Zonites (Moreletia) caducus (Pfr.), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 163, t. 7. 
fige. 8, 3a, and t. 8. figg. 13-16 (radula) *. 
Zonites caducus (Pfr.), Binney, Terr. air-breath. Moll. of N. Am. v. (in Bull.. Mus. Comp. Zodl. 
Harv. Coll. iv.) p. 102. fig. 22°; Manual of Am. Tand-shells (in Bull. U.S. Nat. Mus. 
no. 28), p. 352, fig. 380". 
Moreletia caduca (Pfr.), Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 6, t. 1. figg. 1 6 and 
7 a, ¢, t. 8. figg. 1 (anat.) and 9, 9 a (shell), t. 9. figg. 1 (radula) and 17 (jaw) ™. 
Hab. Nortu America: New Washington, Texas (Romer ° 81°), , 
E. Mexico: Quilate near Misantla, and Soncoautla near Coatepec (Dona Este- 
fania ®); San Antonio Huatusco (Dr. Hille, in coll. Dunker); Jalapa, Cerro de 
Palmas near Cordova (Hége) ; Cordova 4, Orizaba 1? (Sallé) ; Mirador (Strebel ', 
Berendt , Sartorius )°). | , 
Var. strebeliana: magis depressa, magis obscura, strigis fuscis subobsoletis. 
Moreletia fuliginosa, Form B, Strebel, loc, cit. p. 6, t. 8. figg. 7, 7a eee 
Hab. E. Mexico: Quilate, Hirial, and Palpoala, in the environs of Misantla (Strebel ') ; 
Cajetes near San Juan Miahuatlan, between Jalapa and Misantla, in the moun- 
tains (Strebel 16), | 
This species comes very near the preceding, O. lucubrata, from whieh it may be 
distinguished by the finer and more regular strie, the more uniform and yellowish 
colour, the fewer and less fine spiral striae, and the more open umbilicus. ‘There is no 
distinct peripheric band, but in one specimen I have detected a faint sutural one. I 
therefore transfer Pfeiffer’s var. 6 (with Strebel’s angiomphala) to O. lucubrata. 
O. fuliyinosa (Griffith), Fischer and Crosse, op. cit. p. 164, and Strebel, op. cit. p. 5, 
has not hitherto been found within the limits of Mexico. These authors have 
admitted it through my having, in 1865, with. much less material,;determined as 
“ 0. fuliginosa” the specimen which I now call O. lweubrata, var. deppeana. | 
