- 47 - 



Slenogyra Subula in plurimis insulis Caribccis occurrit; 

 liabco uempe e Cuba, St. Thomas et Jamaica. 



30. Steiiogyra (Opcas) octoiioides (C. B. Ad.). 



Syn. JiuHmus oclonoides C. B. Ad. ! in Bost. Proc. 1845, p. 13. 

 Var. ? minor, striis obsoletioribus. 

 Hab. Circa Uumacao, Luquillo et in Insula Vieque. 

 Obs. Differt a precedente testa minore, sericeo-nitidula, anfr. con- 



vexioribus satis argute striatis, et spira minus acuminata : 



etiam e St. Thomas et Jamaica accepi. 



31. Steiiogyra (Opeas) uiärgaritacea Shuitl. n. sp. 



Testa anguste pei-forata, lunita, argute et lemotiuscule striata, 

 margaritaceo-nitens, diaphana, cerea^ spira obtusa^ anfr. 6, vix 

 convexiusculi, ultimus circa 2^7 longltudinis a^quans ; sutura pro- 

 funda ; columella rectiusculaj apertura ovato-oblonga j perist. mar- 

 gin c dextro subflexuoso, columeliari brevissime reflexo. 



Long. 5; Diam. vix 2; Apert. circa IV4 mill. longa, Sj lata. 

 Hab. Rarius ad Rio Blanco in Sierra de Luquillo. 

 Obs. Species pulchra, ut plurimje sectionis , verbis paucis difficil- 



lime describenda, sed nitore margaritaceo , statura parva et 



spira vix subulata facile recognoscenda. 



32. Steiiogyra (Opeas) alabastriiia Shuttl. n. sp. 



Testa angustissime perforata, turrito-subulata, remote costu- 

 lato-striata, vix nitidula, pellucida, alba 5 spira acutiuscula^ anfr. 

 7—8, vix convexiusculi, ultimus vix 1/4 altitudinis aequansj sutura 

 profunda; columella recta; apertura semiovata; perist. margine 

 dextro vix flexuoso, columeliari reflexo, perforationem fei'e occul- 

 tante. 



Long. 7; Diam. 31/57 Apert. IV3 mill. longa, circa 3/i lata. 

 Hab. Rarissime prope San Juan, ubi spec. 4 leglt Blauner. 



33. Steiiogyra (Opeas) Goiuphariimi Shuttl. n. sp. 



Testa angustissime perforata, conico-turrita, remote et irre- 

 gulariter plicatuia, vix nitidula, cerea^ spira acutula, apice obtusa 3 

 anfr. 6, parum convexi, ultimus •/i longitudinis aequans 3 sutuia me- 

 diocris ; columella recta 3 apertura semiovalis; perist. raarginc dex- 

 tro vix flexuoso, columeliari brevissime reflexo, perforationem ferc 

 occultautc. 



Long. 6V2J Diam. V/2; Apert. circa 13/.j mill. longa, 1 lata. 

 Hab. Prope San Juan specimina 3 legit Blauner. 



34. Steuogyi'a (Opeas) Goodalli (Mill.). 



Hab. Prope San Juan, Fajardo, Ceiba, Humacao, Luquillo, et ad 

 Rio Blanco, cum affinibus interniixta, frequcns. 



