370 MOLLUSCA. 
14. Physa osculans. 
Physa osculans (part.), Haldeman, Monogr. Limniades, no. vi. p. 29, t. 2. fig. 11 (1842)"; Kuster, 
in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Limnzaceen, p. 23, t. 4. figg. 1-3°; Pilsbry, 
Proc. Acad. Phil. 1891, p. 323°. 
Physa mexicana (part.), v. Mart. Malak. Blatt. xii. p. 56 (1865) ‘; Strebel, Beitr. Mex. Land- und 
Siissw.-Conch. i. p. 50, t. 6. figg. 26, 26 ¢ (1873) °. 
Physa mexicana, var. conoidea, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, ii. p. 100, t. 39. 
fig. 8°. 
Ovate-oblong, with rather long pointed spire; greyish-yellow, moderately shining; aperture widening consi- 
derably downwards; columellar margin thick, but attenuated and twisted backwards towards the 
lower part. 
a. Long. 21, diam. 12; apert. long. 14, lat. 7 millim. 
b. 9 20, ” 11; ” 14, 9 7 ” 
« 4, 17, 4, 10; » 11},,, 6 ,, 
a. Haldeman’s figure’; 6. Specimen from the city of Mexico’; ¢. Fischer and Crosse’s figure °. 
Hab. Crntra Mexico: city of Mexico, in ditches (Deppe & Schiede*); Lake Texcoco, 
near the city of Mexico (Méhédin®, Heilprin®); San Angel and Yautepec 
(Heilprin®); Mexico, without nearer indication of locality, in company with 
Planorbis tenuis and Limnea subulata (Uhde*); Mexico, also without nearer 
indication of locality (Dr. Burrough1?); Puebla (Boucard®). 
Kiister2 gives as locality “Mexico and Indiana in North America”: this is 
a misunderstanding of Haldeman’s statement! that Dr. Burrough has also made 
collections in Indiana. 
Var. mexicana. (Tab. XX. fig. 13.) 
Physa osculans (part.), Haldeman, loc. cit. fig. 12". 
Physa mexicana (Philippi), Kiister, in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Limnzaceen, 
p. 5, t. 1. figg. 3, 4 (1845-48) *; v. Mart. Malak. Blatt. xii. p. 57 (1865) (part.)°; Binney, 
Land and Freshw. Shells N. Am. ii. p. 88, fig. 143 ° (copied from Kiister); Strebel, loc. cit. 
p- 50, t. 6. figg. 26d, f"; Fisch. & Crosse, loc. cit. p. 100, t. 30. figg. 12, 12 a, 6”. 
More inflated than the type of P. osculans, with shorter spire, but passing gradually into the former. 
a. Long. 21, diam. 124; apert. long. 155, lat. 8 millim. 
B26, «O19, SS 12 ” 15, , 8 ,, 
¢. ” 173, ” 114; ” 143, ” 64 ” 
d. , 15, 4 10; ” 12, , 54,, 
é. ” 15, ” 10; ” 123, ” 6 ” 
a. Philippi’s type, according to Kiister’s figure®; 6. Haldeman’s fig. 12; c. Specimen from the city of 
Mexico, collected by Deppe, Strebel’s fig. 267; d. Fischer and Crosse”; e¢. Another specimen from the 
city of Mexico, collected by Strebel, in Berlin Museum. 
Hab. Norra America: Texas 1°. 
CrntraL Mexico: city of Mexico, in ditches (Deppe & Schiede °, Strebel); Mexico, 
without nearer indication of locality (Dr. Burrough", Philippi® 1°); Lake of 
Chalco, S.E. end of the plain of Mexico (Méhédin 12); Puebla (Godman). 
E. Mexico: Jalacingo, State of Vera Cruz (Hége). 
