262 EMARGINULA. 



E. spinosa Deshayes. PI. 41, figs. 20, 21. 



Shell small, regularly oval, very inequilateral ; elegantly decus- 

 sated with numerous, regular, longitudinal and transverse riblets 

 irregularly roughened with sparse spines ; central riblet larger than 

 the others, ornamented with numerous equal scales ; apex strongly 

 inclined backward, acute. Length 4, breadth 3, alt. 2 mill. (Dh.) 



Island of Reunion. 



■E. spinosa Dh., Moll. Reunion p. 48, t. 7, f. 9-11. 



Fissure long narrow, one-sixth the length of the shell ; the mar- 

 gin is finely crenulated ; shell thin, fragile, semitransparent, of a 

 ver} r pale violet color. 



E. puncticulata A. Adams. PI. 28, fig. 30. 



Shell oval, conical, the apex recurved, situated at the posterior 

 seventh or eighth of the length. Sculpture consisting of about 28 

 principal radiating ribs, each interval bearing three smaller riblets, 

 the middle one largest ; interstices cut into pits by fine concentric 

 raised threads, which only slightly crenulate the riblets. Slit loug, 

 nearly one-third the length of the shell ; slit-fasciole distinct, 

 festooned across by raised lamellee. Color light yellowish. Interior 

 white ; a grooved callus extends upward from the slit inside. 



Length 16, breadth 12, alt. 7 mill. 



Galapan, Id. of Mindoro, Philippines. 



E. puncticulata Ad. P. Z. S. 1851, p. 84.— Sowb. Thes., p. 215, 

 f. 14. 



The large size, long fissure and the arrangement of the riblets 

 described (most obvious on the 'posterior slope), are characteristic 

 features. 



Group of E. maculata. 



Species variegated with dark spots or blotches or of a uniform 

 dark color. 



E. souverbiana Pilsbry. PL 64, figs. 28. 



Shell ovate-suboblong, elevated-conical, apex prominent, exserted, 

 posteriorly incurved, front slope long, convex, back slope shorter, 

 straight-subconcave, obliquely descending at an angle of about 45°. 

 Clathratulate with numerous radiating riblets with smaller ones 

 intercalated, and elevated concentric lines ; dull yellowish-white, 

 marked with rather numerous dark blackish-green spots. Inside 



