50 PSEUDOSUBULINA. 



S. SUTURALIS, Pfr. PL 11, fig. 84. 



Shell thin, pellucid, shining ; greenish corneous ; the suture 

 profound, chestnut or chocolate-color. Length, 10'5 mill. 



Cuba. 



Unfigured Species of Streptostyla. 



S. DELIBUTA, and S. LABIBA, Morelet. Vera Paz, Guatemala. 



S. MERIDANA, Morelet. Merida, Yucatan. 



S. COBANENSIS, Tristram. Guatemala. 



S. SUBCALLOSA, Pfr. Venezuela. 



S. BULLACEA, Pfr. Tabasco, Mexico. 



S. BICONIOA, S. CATENATA, S. OBLONGA and S. PARVULA, Pfr. 



Chiapa, Mexico. 

 Subgenus PETENIA, Crosse and Fischer, 1868. 



The differential characters are principally found in the soft 

 parts, although the single species presents a peculiarity in its 

 shell in possessing a central spiral band. 



S. LIGULATA, Morelet. PL 11, fig. 8*7. 



Rather smooth, shining, olivaceous yellow with a median nar- 

 row dark chestnut band, suture margined. Length, 15 mill. 



Peten and _Palenque, Guatemala. 



Genus PSEUDOSUBULINA, Strebel and Pfeffer, 1882. 

 P. BERENDTI, Pfeiffer. PL 9, fig. 35. 



Moderately solid, subdiaphanous, yellowish white, closely 

 plicate, whorls 12. Length 12*5 mill, 



Orizaba and Mirador, Mexico. 



P. CHIAPENSIS, Pfeiffer. PL 9, fig. 36. 



Moderately solid, pellucid, shining, yellowish white, closely 

 plicately striate , whorls 9-10, suture subcrenulately margined. 



Length, 16 mill. 



Chiapa, Mexico. 

 P. SARGI, Crosse and Fischer. PL 9, fig, 31. 



Closely plicately striate, pellucid, shining, rather thin, oliva- 

 ceous horny ; whorls 9, suture slightly crenulated, apex obtuse. 



Length, 14 mill. 



Guatemala. 



