6 MOLLUSCA. 
Cyclostoma ponderosum, Pfr. P. Z. S. 1851, p. 243°, and in Martini & Chemarte, Syst. Conch.- 
Cab. ed. 2, Cyclostoma, no. 242, p. 257, t. 35. figg. 12, 14°. 
Cyclophorus ponderosus, Pfr. Monogr. Pneum. Vivent. i. p. 97°; Gray, Cat. Phaneropn. p. 68°; 
Tristr. P. Z.S. 1861, p. 232°; v. Mart. P.Z.S. 1875, p. 6487; Reeve, Conch. Icon. xiii., 
Cyclophorus, t. 15. fig. 70°. 
Amphicyclotus ponderosus, Fischer & Crosse, Miss. Scient. Mex., Mollusca, ii. p. 147, t. 35. fig. 3°. 
Hab. N. Guatemaa (Morelet® 4° °8 ; mus. Cuming? ; Sarg ®), Coban (Salvin "), Senahu 
(Champion). 
The specimen delineated by Reeve has a yellowish band, which is wanting in other 
specimens. 
2. Cyclophorus (Amphicyclotus) maleri. 
Amphicyclotus maleri, Crosse & Fischer, in Journ. de Conch. xxxi. p. 102 (1883) '; Miss. Scient. 
Mex., Mollusca, ii. p. 145, t. 41. £.3°. 
Hab. 8.W. Mexico: Santa Efigenia, Tehuantepec (Sumichrast 2); Tabasco (Maler ! 2), 
3. Cyclophorus (Amphicyclotus) texturatus. 
Cyclostoma texturatum, Sow. Thes. Conch. Suppl. no. 182, p. 160*, t. 81 a. fig. 3031; Pfr. in Martini 
& Chemnitz, Syst. Conch.-Cab. ed. 2, Cyclostoma, no. 248, p. 258, t. 35. figg. 10, 11°. 
Cyclophorus texturatus, Pfr. Monogr. Pneum. Vivent. i. p. 97°; Gray, Cat. Phaneropn. p- 684; 
Reeve, Conch. Icon. xiii., Cyclophorus, t. 15. fig. 67°; v. Mart. P. Z.S. 1875, p. 648%. 
Amphicyclotus texturatus, Vischer & Crosse, Miss. Scient. Mex., Mollusca, ii. p. 144, t. 85. fig. 2, 
& t. 38. fig. 3%. 
Hab. 8.W. Mezxico: Tehuantepec (Swmichrast 7); Cerro de Plumas, near Puerto Angel, 
tropical forest (Hége). 
N. Guatemata !?345: Coban (Salvin %); at the side of the road between Tactic and 
Tamahu (Sarg *). 
4, Cyclophorus (Amphicyclotus) boucardi. 
Cyclostoma (Cyclophorus) boucardi, Pfr. P. Z.S. 1856, p. 328, t. 35. fig. 257; Monogr. Pneum. 
Vivent. i. p. 65 ”. 
Amphicyclotus boucardi, Fischer & Crosse, Miss. Scient. Mex., Mollusca, ii. p. 142, t. 35. fig. 1°. 
Hab. E. Muxtco: Cordova in the State of Vera Cruz (Sallé128, Hoge). 
5. Cyclophorus (Amphicyclotus) lutescens. 
Cyclostoma (Cyclophorus) lutescens, Pir. P. Z. 8. 1851, p. 250°. 
Cyclostoma lutescens, Pfr. in Martini & Chemnitz, Syst. Conch.-Cab. ed. 2, Cyclostoma, no. 345, 
p. 333, t. 43. figg, 12-147. 
Cyclophorus lutescens, Pfr. Monogr. Pneum. Vivent. i. p. 82°, & iii. p. 69'; Gray, Cat. Phaneropn. 
p. 56° _ Conch. Icon. xiii., Cyclophorus, t. 16. fige. 75°; Angas, P. Z.S. 1879, 
p. 483" 
