MOLLUSCA. 493 



25. Columbella nympha, Kiener. 

 Providence Eeef, Mascarenes, 24 fms. 



26. Columbella seychellensis. (Piate XLIV. fig. G.) 



Shell small, narrow, ovate-fusiform, opaque white, irregularly 

 blotched with brown. Whorls 9, three apical smooth, concave ; 

 the rest only very slightly concave, separated by a linear suture, 

 above which revolves a white line dotted with brown, which also 

 passes round the middle of the last whorl; this is not much con- 

 tracted ,at the lower part, around which there are about half-a- 

 dozen oblique grooves. The aperture is long and narrow, together 

 with the oblique basal canal occupying rather less than the whole 

 length of the shell. The outer lip is thickened externally by a 

 broadish white varix. The columella is nearly perpendicular at the 

 middle, and covered with a thin callosity. Length 8 millim., 

 greatest width 3. 



SeycheHe Islands, 4-12 fms. 



This curious little species is somewhat chrysaloid in form. The 

 outlines of the spire are just a little concave below the apex, and 

 gradually become slightly convex lower down. The outer lip in the 

 single specimen at hand is smooth within, having been inhabited by 

 a minute Pagurus ; but it is very probable that fine lirae will be met 

 with in other specimens. 



27. Columbella moleculina. 



Ihiclos, Monogr. Columbella, pi. 9. figs. 1 & 2; id. in ChemnCs Ilhistr. 

 Conch, pi. 9. figs. 1 & 2. 



Etoile Island, Amirantes, 13 fms. {Ooppinger) ; Marquesas 

 {Pease, in Brit. Mus.) ; Makeira Harbour, San Christoval, Solomon 

 Islands {J. Brazier, in Brit. Mus.). 



This species, although characteristically figured in the above un- 

 finished monographs, has not, I believe, been as yet described. It 

 is small, ovately fusiform, glossy, white, covered with a network or 

 connected circles of a yeUowisb-brown colour, varied with two 

 interrupted dark-brown transverse lines, one at the upper part of 

 the whorls a little below the suture, where the ground-colour is at 

 times opaque snowy white, and the other, consisting of less elongate 

 spots, round the base of the body-whorl. Volutions 8," smooth, 

 three apical convex, the rest nearly flat at the sides, very faintly 

 gradated ; the last rounded at the middle, contracted beneath, and 

 strongly transversely grooved at the extremity. Aperture small, con- 

 tracted into a short oblique canal in front. Outer lip strengthened 

 with a remarkably broad external varix, distinctly sinuated a little 

 below the suture and armed within with six small denticles, of 

 which the second and third below the sinus are usually the largest. 

 Columella covered with a callus bearing three or four elongate 

 transverse tubercles at the lower part. Length 6 millim., width 2^, 



