CHONDROPOMA. ET 
bb. Shell oblong. 
3. Chondropoma subangulatum. (Tab. I. fig. 5.) 
Cistula subangulata, v. Mart. Sitzungsb. Ges. naturf. Freunde Berlin, 1886, p. 162°. 
Hab. N. Guatemata: Teleman in the Polochic valley (Stoll1); Senahu 2500 feet, in 
the same valley, above Panzos, copiously, in very humid forest (Champion). 
Approaches in general features the following, but is distinguished by the subangu- 
late or even angulate upper whorls and the pale colour. 
4. Chondropoma rubicundum. | 
Cyclostoma rubicundum, Morelet, Test. Noviss. i. p. 221; Pfr. in Martini & Chemnitz, Syst. Conch.- 
Cab. ed. 2, Cyclosioma, no. 273, p. 280, t. 37. figg. 29, 30°. 
Chondropoma rubicundum, Pfr. Monogr. Pneum. Vivent. i. p. 291°; Gray, Cat. Phaneropn. p. 207°‘; 
Tristr. P. Z.S. 1861, p. 232°; v. Mart. P.Z.S. 1875, p. 649°; Reeve, Conch. Icon. xiv., 
Chondropoma, t. 6. fig. 47 (not good)’; Fischer & Crosse, Miss. Scient. Mex., Mollusca, 
ii. t. 41. fig. 5 (letterpress not yet published). 
Hab. N. Guatemata’: province of Peten and Vera Paz?4, on the leaves of trees 
(Morelet 1%); Coban, Vera Paz (Salvin ® °) ; lower valley of the Polochic (Stol/). 
Somewhat variable in size and colour, ordinarily of a distinct red hue, the top dark 
bluish or nearly black. 
5. Chondropoma cordovanum. 
Cyclostoma (Chondropoma) cordovanum, Pfr. P. Z. S. 1856, p. 323°. 
Chondropoma cordovanum, Pfr. Novit. Conch. i. p. 91, t. 25. figg. 18, 19°; Monogr. Pneum. 
Vivent. ii. p. 145°; Reeve, Conch. Icon. xiv., Chondropoma, t. 4. fig. 24°. 
? Chondropoma cordovanum, Fischer & Crosse, Miss. Scient. Mex., Mollusca, ii. t. 41. fig. 6 (letter- 
press not yet published). 
Hab. E. Mexico: Cordova, State of Vera Cruz (Sallé, Hége 13+); Atoyac (Hoge). 
cc. Shell elongate. 
6. Chondropoma acerbulum. 
Cyclostoma acerbulum, Morelet, Test. Noviss. ii. p. 19°; Pfr. Monogr. Pneum. Vivent. i. p. 4207 ; 
Gray, Cat. Phaneropn. p. 225°. 
Chondropoma acerbulum, Fischer & Crosse, Miss. Scient. Mex., Mollusca, ii. t. 41. fig. 4 (letterpress 
not yet published). 
Hab. N. Guatemata: Vera Paz (Morelet +? °). 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, May 1890. 3 
