36 OLEACINA. 



^Decussated. 

 0. LIGNARIA, Reeve. PL 6, figs. 81, 85. 



Rather thin, closely striate, decussated by remote, impressed 

 spiral lines, which are slighter towards the base, scarcely 

 shining; red-brown, with irregular chestnut strigations ; whorls 

 8, suture rudely crenulated. Length, 94-116 mill. 



Mexico. 

 Strebel considers this a form of 0. Sowerbyana. 



O. FUSIFORMIS, Pfeiffer. PI. 6, fig. 88. 



Thin, closely longitudinally costulate, reticulated by minute 

 spiral lines, orange-red, with deeper-colored apex, irregularly 

 strigate ; whorls 7-8, suture margined ; columella and margin of 

 aperture reddish. Length, 87 mill. 



Coban and Vera Paz, Central America. 



Yar. STRAMINEA, Crosse and Fischer. Straw-color, strigate 

 with light orange-red, apex and outer margin of aperture reddish, 

 interior pearly white. 



O. SOWERBYANA, Pfeiffer. PI. 6, fig. 86. 



Rather thin, diaphanous, closely longitudinally plicate, granu- 

 larly decussated by irregular spiral striae; orange-red, with 

 distant chestnut strigations ; whorls 7, suture crenulated, white- 

 margined. Length, 88 mill. 



Mexico. 

 O. ESTEFANI^E, Strebel, PI. 8, fig. 5. 



Differs in form principally from 0. Sowerbyana, of which 

 Strebel originally considered it a variety. Length, 60 mill. 



Mexico. 

 0. AURATA, Morelet. PI. 6, fig. 83. 



Solid, opaque, shining, violaceous orange, granulately decus- 

 sated ; whorls 6, suture white, margined, denticulated ; margin 

 of aperture somewhat thickened, pearly within. Length, 87 mill. 



Vera Paz, Guatemala (in woods). 



O. DISTINGUENDA, Tryon. PI. 8, fig. 13. 



This shell, figured by Strebel as a narrow variety of 0. aurata, 

 is immediately separable from that species by its slim form. 



Length, 72 mill. 



Mexico. 



