52 RAVENIA. 



Y. CONFERTESTRTATUS, Strcbel. PI. 9, fig. 45. 



Approaches in form the preceding species, but has the more 

 numerous plications of V. confer 'tecostatuv, although they are not 

 so strong as in the latter species. 



Near Jalapa, and Mirador, Mexico. 



Y. NITIDUS, Strebel. PL 9, figs. 46, 47. 



Shell shining, clear yellowish horn-color, with a narrow sutural 

 zone ; surface essentially smooth, with distantly marked growth- 

 lines. 



Mexico. 

 Y. LINEARIS, Pfeiffer. PI. 9, fig, 48. 



Very thin, hyaline, closely striate, whorls 7. Length, 15 mill. 



Near Vera Cruz, Mexico. 

 Y. ACUS, Shuttleworth. PL 9, fig. 24. 



Shell whitish corneous, sharply, regularly costulate ; whorls 

 12-13, flattened in the middle, very convex near the sutures. 



Length, 16 mill. 



Near Cordova, Vera Cruz, Mexico. 



Y. MELANIELLOIDES, Gundlach. PL 9, fig. 29. 



Closely, somewhat arcuately striate, thin, pellucid, yellowish 

 white ; whorls 8, somewhat flattened in the middle, very obscurely 



angulated at the base. Length, 6'5 mill. 



Cuba. 

 Y. RECTUS, Pfeiffer. PL 9, fig. 31. 



Rather thin, closely subarcuately plicatulate, somewhat shining, 

 wax-colored; whorls 7, suture impressed; columella slightly 

 callous, with a light superior plication. Length, 5 mill. 



Sierra Monte Christi, Haiti. 

 Y. BLANDI, Crosse and Fischer. PL 9, fig. 23. 



Thin, diaphanous, obsoletely plica tely striate, striae rather 

 distant, more apparent near the suture ; whorls 6, with well- 

 marked suture ; light yellowish corneous. Length, 8'5 mill. 



Vera Cruz, Mexico. 



Genus RAYENIA, Crosse, 1873. 



R. BLANDI, Crosse. PL 22, fig. 1. 



Shell imperforate, turriculated. thin, translucent, almost crys- 

 talline, and marked by slightly flexuous longitudinal striae ; 



