PATULA.—HELIX. 129 
“Yucatan: Merida, under stones (Morelet 4, Heilprin®); Tunkas and Tekanto 
(Heilprin >), | 
N. Guatemata; Tenosique and Flores, province of Peten (Morelet 8), 
? Honpuras : Utila Island (Simpson ®). 
_ Known only from Morelet’s description, and a somewhat doubtful not full-grown 
specimen in the Berlin Museum, given by the late dealer L. Parreyss of Vienna, and 
described by Strebel*. I cannot help suspecting that Ancey’s Helix horni® may belong 
to the same species. 1. horni, Gabb, is from Arizona, and the description of it nearly 
agrees with P. conspurcatella. 
5. Patula impura. : 
Helix impura, Pfr. in Malak. Blatt. xii. p. 79 (1866); Monogr. Helic. Vivent. v. p. 137°. 
Helix (Patula) impura (Pfr.), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 229°, . 
Thysanophora impura (Pfr.), Strebel, Beitr. Mex. Land- und Siissw. -Conch. iv. p. 30, t. 4, Bg. 24, 
Patula impura (Pfr.), Pilsbry, Proc. Acad. Phil. 1891, p. 314’. ; 
Hab. ¥. Mexico: Mirador, near Jalapa (Berendt !~*); Vera Cruz (Heilprin ». 
S.W. Mexico: Yautepec, Morelos (Heilprin ®). 
It is somewhat doubtful if P. ¢mpura is really distinct from P. sonspureatelta 
6. Patula paleosa. 
Thysanophora paleosa, Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 30, t. 4. fig. 3°. 
Patula paleosa (Streb.), Pilsbry, Proc. Acad. Phil. 1891, p. 314°. 
Hab. E. Mexico: woods of Pacho, near Jalapa (Strebel +); Orizaba, on hills, 500 feet 
above the town (Heilprin ). 
i 
7. Patula turbinella. (Tab. VII. figg. 2, 2a, 5.) 
Helix turbinella, Morelet, Test. Noviss. ii. p. 9 (1851)'; Pfr. Monogr. Helic. Vivent. iil. p. 58°. 
Helix (Patuila) curdinella (Morel.), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p- 229, t. 12. 
figg. 2, 2a-c | 
Hab. N. GuateMaLa: woods of Peten, very rare (Morelet 1~°). 
The single specimen of this species kindly lent me for examination by M. A. Morelet 
is elegantly trochiform, only subangulated, of a pale greyish colour, somewhat yellowish 
near the aperture, with very oblique, somewhat unequal, distinct strie. Our figure is 
taken from this shell. 
HELIX. 
Helix, Linnzus, Syst. Nat. ed. 10, p. 678 (1758); Draparnand, Hist. Nat. Moll. Terr. et Fluv. de la 
France, p. 78 (1805) ; Albers, Die Helic. ed. 2, p. 80. 
Shell globose, depressed, or trochiform; aperture with reflexed edges, generally 
without plaits. Jaw ribbed. Marginal teeth of the radula short, with several cuspids. 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, March 1892. 17 
