332 MOLLUSCA. 
surface, the umbilicus being, in Morelet’s specimen, covered for about one-third of its 
circumference by the margin of the aperture. In the Tabasco example the umbilicus 
is a little more open. We figure a specimen from Morelet’s collection, as it differs 
somewhat 1 in outline from the one given by Fischer and Crosse ®. 
4, Helix guatemalensis. 
Helix guatemalensis, Crosse & Fisch. Journ. de Conch. xx. p. 222 (1872)', and xxi. p. 274, t. 9. 
fig. 3 (1873) ?. 
Pseudohyalina guatemalensis, Ancey, Ann. de Malac. ii. p. 240 (1886) °. 
Hab. N. Guatemata: probably Coban (Sarg 1”). 
W. Gvuaremana: Retalhuleu, Pacific slope (Stol/). 
Stoll’s specimens are somewhat larger and higher (3 millim. in both dimensions) than 
Crosse and. Fischer’s type, but in other respects they agree with it. 
5. Helix intonsa. 
Patula intonsa, Pilsbry, Proc. Acad. Phil. 1891, p. 314, t. 15. figg. 1-3°. 
Hab. ¥. Mexico: Orizaba (Heilprin'). 
Subgen. VaLtonta, Risso. 
Shell small, depressed, rounded ; umbilicus rather wide; peristome thick, reflexed. 
No glandule mucose. Dart long, smooth, simple. | 
H. pulchella, Mill. Depressa, modice umbilicata, sublavis, albida, peristomate subcirculari, late reflexo. 
Diam. maj. 3, alt. 2 anfr. 34 millim.—Circumboreal. 
6. Helix pulchella. 
Helix pulchella, O. Fr. Miiller, Hist. Verm. ii. p. 30 (1774)? ; Draparnaud, Hist. Nat. de Moll. 
Terr. et Fluv. de la France, p. 112, t. 7. figg. 33, 34°; Voith, in Sturm’s Deutschl. Fauna, 
vi., Wiirmer, part 3, t. 12 (living animal) (1813) °; Rossmassler, Icon. d. Land- und Siissw.- 
Moll. ii. p. 5, t. 31. fig. 440°; Pfr. Monogr. Helic. Vivent, i. p. 365°; Forbes & Hanley, 
Hist. Brit. Moll. iv. p. 78, t. 119. figg. 8-13°; Moquin-Tandon, Hist. Nat. de Moll. Terr. 
_ et Fluv. de la France, ii. p. 140, t. 11. figg. 84 (shell), 28-30 (anatomy) *; Albers, Die Helic. 
ed. 2, p. 101°; Jeffreys, Brit. Conch. i. p. 224, and v. t. 14. figg. 1 a, 6°; L. v. Schrenck, 
Reisen im Amur-Lande, i. p. 681"°; Binney & Bland, Land and Fresh- water Shells of 
N. Am.i. p. 157, fig. 270"; Terr. air-breath. Moll. N. Am. ii. p. 175, t. 17. fig. 1”; 
~ Lehmann, Lebend. Schnecken u. Muscheln Stettins, p. 90, t. 11. fig. 30 (anatomy) ". 
Helia minuta, Say, in Journ. Acad. Phil. i. p. 123, (1817)”. 
Vallonia pulchella (Mill.), Binney, Terr. air-breath. Moll. N. Am. v. p. 344"; Manual of Am. 
Land-Shells, p. 77 °°. 
Hab. CentRaL GuaTeMsLa: Antigua, in gardens, probably introduced (O. Stod/, 1878). 
. Widely distributed throughout the whole of Europe, from Norway (622° N. lat.) and 
