142 OPEAS, WEST AFRICA. 



well-founded is a question which must remain unsettled until 

 specimens from Rang's original locality can be compared. 



6. O. PAUPER (Dohrn). PI. 15, fig. 62. 



Shell minutely perforate, oblong-turrited, striate, whitish- 

 corneous, thin, diaphanous, waxy-shining. Spire turrite, the 

 apex rather obtuse ; suture impressed. AVhorls 6, nearly flat, 

 moderately increasing, the last about one-third the total 

 length, 'compressed around the perforation. Aperture oblong, 

 vertical; peristome simple, the right margin arcuate, unex- 

 panded. Columellar margin a little expanded, reflexed. 

 Length 6, diam. 2.5, aperture 2x1.5 mm. (Dohrn}. 



Prince Island : under rotten wood in a forested ravine. 

 (Dohrn). 



Stenogyra (Opeas) pauper DOHRN, Malak. Bl. xiii, 1866, 

 p. 126, pi. 5, f. 14-16. CROSSE, J. de Conch. 1888, p. 302.- 

 Bulimus p., PPR. Monogr. vi, p. 103. Opeas p. GIRARD, 

 Jornal, etc., iii, 1893, p. 105. 



7. 0. DOHRNI Girard. PI. 15, fig. 63. 



Shell turriculate, narrowly perforate, thin, diaphanous, 

 slightly glossy, dirty yellowish, sculptured with very fine, 

 quite regular and slightly arcuate growth strige. Spire re- 

 gularly increasing, composed of 6 or 7 quite convex whorls 

 separated by a deep suture, and terminating in an obtuse 

 summit. Last whorl contained 3y 2 times in the total length, 

 rounded. Aperture long-oval, slightly oblique; peristome 

 simple, acute, the margins joined by a very distinct callus; 

 columellar margin straight, reflexed, basal margin a little ef- 

 fuse, outer margin noticeably arched forward. Length 8.5, 

 diam. 2.75, aperture 2.5x1.25 mm. (Girard). 



Prince Island, with 0. crossei; St. Thome in the ravines of 

 the Northwest coast, etc. (F. Newton). 



Opeas dohrni GIRARD, Jornal, etc., iii, p. 105, pi. 1, f. 14. 



It is astonishing that this species which inhabits Prince Is. 

 and is quite common on St. Thome, has been collected only by 

 Mr. Newton. It belongs near 0. gracile Hutt. and apex 

 Morch. The specimens from St. Thome sometimes have the 



