var <■ v Martens. 



\. MartensJ. l Molluskenfauna dei Insel Mauritius. Moll. \>. :■ 



KlENER. Coq. Viv. Vol. IX. Solarium, PI. 3, fig. $a [liybridum var.). 



1'iiii.iiti. Martini-Chemn. Conch. Cab. Ed. II. Vol. II. Solarium, PI. 2, fig. 14. 15. 



'i Spec. 

 This 'ii perfectly agrees with the figure. 



Fluxina Dall. 



1. Fluxina marginata n. sp. PI. XIV, fig. 2. 



St.it. 241. 4 24.3 S., 1 .'m |_9'.3 E. Banda Sea. 1570 M. Dark sand with small stones. 2 Sprc. 



Shell whitish, thin, very depressed, conic, sharply keeledatthe periphery, postnuclear whorls 

 about 5, spirally divided into 2 parts, convex above luit concave if taken as a whole, nucleus 

 umbilicate; sculpture consisting of very faint spiral striae, crossed by stronger, undulate, riblike, 

 rather distant ones, with faint growth-striae in the interstices; these riblike striae are less 

 conspicuous on tin- last whorl; the lower pari of each whorl has tin- appearance of a broad 

 margin, slightly concave above, separated from the upper part of each whorl, in- a kind of 

 spiral rib, which is slightly crenulated, this marginal part is sculptured In' rather conspicuous 

 spiral aml stronger, oblique, luit nearly straight, riblike radiating striae, which on the upper 

 part make the keel slightly crenulate (on the Iargest specimen the keel is smooth, on account 

 of the less conspicuous sculpture . basal part of last whorl convex, with a \\:w more or less 

 conspicuous spiral striae around the umbilicus, and faint, stronglj curved, radiating striae; margin 

 separated from tin- central part by .1 deep groove, with about 7 spirals and faint growth-striae. 

 Umbilicus large, pervious, scalar, bordered by a strong rib which is surrounded by a deep groovi . 

 umbilical wall perpendicular. Aperture rhombic, with convex upper, outer and basal margins; keel 

 protracted in a claw in the younger specimen, columellar margin excavated, slightly thickened, 

 angular below near the umbilical keel, and forming there a somewhat tongue-shaped triani 



Ah. ,v ,. lat. s ,. apert. alt. i,;,, lat. 2 1 /., Mill. 



Alt. ; , lat. S ; apert. alt. 1 . lat. 2 , Mill. 



This is the second species oi Fluxina from the Indian Ocean, quite different from the 

 ibed species, by the broad margin at the periphery; the claw-like angle of the aperture 

 and the umbilical ril), have induced me to locale it in this genus. 



2. Fluxina trochiformis n. sp. PI. XIV, fig. ;. 



Stat. 178. 240 S.. i28°37'.5 E. Ceram Sea. 835 M. Blue mud. 1 Sp 



Shell white. thin. conic, sharply keeled, whorls about <>. nucleus slightly umbilicate, post- 



ear whorls with very fine curved growth-striae, nearly smooth, nearly straight, luit slightly 



upper pan. slightly concave near the lowér suture, the whorls are prominently keeled 



uure. the keel being il 1 1 < • 1 \ (i Base a little convex, excavated towards the 



with three fme spirals ai ome distance from the periphery and a few, scarcelj 



