449 



spiral striae, conspicuous in upper wliorls, taint on last one, hut stronfjcr towards and on the canal. 

 Aperturt; olono-ately-oval, angular above, with a wide canal helow; perisLouK' dainaj^^cd, accordinj^ 

 to the iin(> ^■r<Hvth-lines, with a ver)- shallow sinus above, then regularly arched; C(;lunicllar 

 margin C(Micavi' above, tluMi nearly straight, at last slightly directed to the left, covered with 

 a layer of enamel, which is thin above, stronger below. Interior of aperture smooth. 



Alt. 54, lat. i8; apert. alt. 277,, lat. 7'/. Mill. 



A rather doubtful species, which I thought might still belong to Siircii/a, but Mr. SNirni, 

 who compared it in the British Museum, thinks it nui}' be a Spergo^ a grou|) described by 

 D.u.i. (l^-oc. U. S. Nat. Mus. Vol. XVII, 1894, p. 680), with 2 Species (I.e. PI. 24, fig. i, 2, 

 PI. 31, fig. 11); unfortunately the nuclear whorls, which ought to be of a Sinitsigera-Q\\7xx7S.QX.&\\ 

 with oblique, reticular, curved sculpture is wanting, as well as the soft parts, with or without 

 an operculum. Of the two species described and figured, it resembles more .V. daphnel hides Uall 

 in shape and sculpture. I have followed Mr. Smith's advice, though, under these unfavorable 

 circumstances, with considerable doubt. 



Daphnellopsis n. gen. 



Shell elongately-fusiform, with smooth nucleus, aperture elongated, with a strong vari.x; 

 exteriorly, behind the peristome, which, in some measure is double, the internal peristome wath 

 a horizontal upper margin, a denticulated outer one, with a wide shallow sinus at the point of 

 junction and an angle at the entrance of the short, slightly upturned canal; columellar margin 

 slightly concave above, with a conspicuous layer of enamel. 



Type: D. laiiicllosa Schepman. 



I. Daphnellopsis lamellosa n. sp. PI. XXX, fig. 10. 



Stat. 306. 8°27'S., 122° 54'. 5 E. Savu-sea. 247 M. Sandy mud. 5 Spec. 



Shell same characters as genus, whitish. Whorls 6, of wdiich about 1Y2 form a convex, 

 smooth, slightly inclining nucleus ; post-nuclear whorls convex, separated by a deep suture. 

 Sculpture consisting of numerous, lamellose ribs, 26 in number on last whorl, besides a sharp 

 one behind peristome ; these ribs are w' aved by the intercrossing of spiral lirae, 4 principal and 

 a few intermediate ones on penultimate whorl, more lamellose and prominent near the aperture 

 and at the base and canal of last whorl, where they amount to about 16; true peristome strong,, 

 with 6 denticles below upper sinus and another at some distance, at the entrance of canal, 

 the so-called exterior peristome, consists of many layers around upper sinus. Columellar margin 

 with the layer of enamel thin and appressed above, thick and nearly loosened below. 



Alt. 9, lat. 3; apert. alt. 47,, lat. 17.5 Mill. 



Alt. 8, lat. 3; apert. alt. 37.5, lat. 17,5 Mill. 



First measurements of the largest specimen with nucleus, but no developed inner peris- 

 tome, second ones of specimen without nucleus, but with the peristome quite complete. 



This remarkable species is one of the puzzles of the Siboga-collections. It is impossible 

 to locate it with any certainty in one of the groups of Gastropods : the sinus makes it probable 



8s 



