34 OLEACINA. 



O. CYLINDRUS, Martens. PL 8, fig. 8. 



Closely, lightly ribbed-striate, somewhat thin, white ; whorls 

 7, apex very obtuse ; suture elegantly crenulated, but without a 

 distinct impressed line. Length, 39 mill. t 



Columbia, S. A. 

 O. LUCID A, Strebel. PL 8, fig. 4. 



Orange-brown, acutely and closely plicate; whorls 5, suture 

 lightly creriate. Length, 41 mill. 



New Granada. 

 0. FILOSA, Pfeiffer. PL 6, fig. 76. 



Solid, longitudinally closely threaded-plicate, light rosy ; 

 whorls 6, suture subsimple ; aperture reddish. Length, 39 mill. 



Orizaba, Mexico. 



Yar. MAJOR, Crosse and Fisher. Reddish brown, columella 

 strongly curved. Length, 42 mill. 



O. ALBERSI, Pfeiffer. PL 6, fig. 84. 



Shell thin, closely longitudinally striate, pellucid, light red- 

 dish ; whorls 5J-6, suture subsimple. Length, 30 mill. 



Mazatlan, West Coast of Mexico. 

 O. TURGIDA, Pfeiffer. 



Orange-brown; lightly, closely striated, scarcely shining; 

 whorls 7, suture smoothly crenulated. Length, 30 mill. 



An unfigured species. Juquila, Mexico. 



O. CONFERTA, Pfeiffer. PL 8, fig. 6. 



Somewhat thin, pellucid, yellowish, shining, closely plicate- 

 striate ; whorls 8, suture submargined. Length, 25 mill. 



Juquila, Mexico. 

 0. DIFFICILIS, Crosse and Fischer. PL 6, fig. 78. 



Rather thin, longitudinally striate, body-whorl becoming 

 smooth below the middle ; light orange-red ; whorls 7^, suture 



rather irregularly impressed. Length, 20 mill. 



Mexico. 



A slightly contorted columella reminds one of the genus 

 Streptostyla. 



0. TEXASIANA, Pfeiffer. PL 6, fig. 82. 



Moderately solid, pellucid, closely longitudinally striate, 

 orange-rose color; whorls 6, suture minutely denticulated, 

 lighter-colored. Length, 29 mill. Texas. 



