38 OLE AGIN A. 



O. SUBVARICOSA, Albers. PI. 7, fig. 89. 



Thin, subarcuately plicate, closely spirally slriate ; light red- 

 dish, irregularly strigate with white and orange-brown, subvari- 

 cose; whorls 7, suture whitish, crenulated. Length, 61 mill. 



Venezuela. 

 O. UHDEANA, Martens. PL 9, fig. 26. 



Closely rather obsoletely plicate, partially reticulately decus- 

 sated by impressed spiral lines ; somewhat shining; rosy brown, 

 with a few brown and white strigations ; whorls 7, suture irregu- 

 larly dentate. Length, 67 mill. 



Vera Cruz, Mexico. 



Said to be closely allied to 0. subvaricoso,, Albers. It may 

 possibly also equal O. Coulteri, Gray. 



O. COGNATA, Strebel. PL 8, fig. 9. 



Rather solid, light brownish yellow, darker towards the apex, 

 whitish within, becoming brownish red towards the margin, 

 occasionally strigately thickened ; sculpture as in 0. Uhdeana, 

 but more feebly marked. Length, 56 mill. 



Tehuantepec, Mexico. 



O. NYMPHA, Crosse and Fischer. PL 7, fig. 97. 



Rather solid, longitudinally, irregularly ribbed-striate, with 

 undulating impressed spiral lines ; whorls 8, suture irregularly, 

 shortly denticulate-crenate. Length, 60 mill. 



Mexico. 

 O. ROSEA, Ferussac. PL 7, fig. 95. 



Somewhat attenuated at both extremities, orange-rose color, 

 closely striated, granulated between the striae ; whorls 6 J, suture 

 margined and denticulated. Length, 60 mill. 



Central America. 



Yar. ft. Yellowish orange. 



Yar. f. Subelongate, ovately fusiform, suture and aperture 

 red-margined. 



The synonymy includes 0. Cumingii, Beck, and 0. Petiti, var., 

 Strebel, who unites it with that species. 



0. PETITI, Deshayes. PL 7, fig. 98. 



Rather solid, very closely longitudinally plicate-striate, nar- 



