SIMl'UI.OPSIS PLATYSUCCINEA. 225 



i, near Utnado, Porto Rico, on leaves of Gujave trees, 

 Psidium piriferum and pomiferum (Gundlach & Krug). 



Bidimns (Eudioptus) psidii MARTENS, Jahrb. d. D. Malak. Ge- 

 sell.. iv, 1877, p. 351, pi. 12, f. 6. 



' 1 am not at all certain that the specimens before me are com- 

 pletely mature, but neither do I know of any Portorican species 

 which they could be considered the young of. There are several 

 specimens of the same size, and both Gundlach and Krug assert that 

 they are not the young of any other species" (Martens). 



The far smaller size, with the same number of whorls as S. porto- 

 ricensis, indicates that this is not the young of that form. Though 

 not hitherto referred to Simjjulopsis, it is evidently congeneric with 

 portoricensis. 



S. DOMINICENSIS Pfeiffer. PI. 63, fig. 75. 



Shell globose, with short, conic spire and large, oblique body- 

 whorl, smooth except for some slight growth-wrinkles, and faint 

 transverse impressions on the last whorl, glossy, pale yellow, very 

 thin, and when not adult extremely fragile. Whorls 3^, convex, 

 separated by deeply impressed sutures, the last whorl rotund. Aper- 

 ture quite oblique, rotund, slightly excised by the penultimate 

 whorl ; columella arcuate above, sloping below, thin. Alt. 6.4, diam. 

 7 mill. 



Haiti: Sans-souci (Rolle) Santo Domingo, Mt. Dieyo Campos on 

 leaves of palms (Hjalmarson); San Cristobal (Salle); Santa Dominyo 

 without exact locality (Gabb). 



S. dotninicensis PFR., Malak. B!., 1858, p. 146; Monogr. iv, p. 

 802; v, p. 23. CROSSE, Journ. de Conchyl., 1891, p. 127. 

 Vitrina ?, HJALMARSON, Malak. Bl., v, 1858, p. 146. 



The specimen figured was collected by Gabb. The young are 

 very fragile and pellucid, with the texture of Vitrina. The altitude 

 u 3 mill." assigned by Pfeiffer must be a mistake, possibly from mis- 

 reading the scale. 



S. acNEA Pfeiffer. PI. 63, figs. 58, 59, 60. 



Shell conic-globose, thin, very closely striated, pellucid, with 



bronze reflections, olivaceous-corneous. Spire short, slightly conic, 



the apex rather obtuse, roseate; suture impressed. Whorls 2^, at 



first convex, the last inflated. Aperture oblique, oval, glossy and 



15 



