Report on the zoological collections made in the Indo-Pacific Ocean ...

;MOLLUSCA. 499M. concentrica, Reeve, which is regarded by some authors as avariety of this species, is, I think, sufficiently distinct. The spireis rather more acuminate, the whorls are not angular, the costaemore numerous and not acutely noduled.54. Turricula (Callithea) modesta, Reeve.Darros Island, in 22 fms. ; also Mauritius (Sowerhy ^ Lienard) ;Philippines ( Cumiwj).55. Turricula (Callithea) bipartita. (Plate XLIV. fig, 0.)Shell small, fusiformly ovate, having the spire and the upperhalf of the body-whorl white, and the lower half stained with adirty pale flesh-coloured band beneath and pinkish white at theextremity. Whorls 8 ; three apical smooth, convex, the rest a littleconvex at the sides, longitudinally costate and spirally grooved.Costae about 14 in number on the penultimate whorl, attenuatedinferiorly on the last, and not quite cut across by the transversesulci ; these are deepish, not quite so broad as the interstices,numbering from 6 to 7 on tho penultimate volution and about 16on the last. The aperture is small, occupying less tlian half thelength of the shell. The columella is pale pink, covered with athin callus bearing four oblique plaits. The outer lip is thin, andarmed within with about eight thread-like lirae. Length 6 millim.,diam. 2^,Providence Eeef and Cerf Island, Mascareues, in 10-24 fms.This is a very small species, but probably adult, as the morecrowded character of the costse behind the labrum indicates. Thedirty fleshy zone around the middle of the body-whorl is sometimesslightly visible upon the spire just above the suture.50. Marginalia picturata. (Plate XLIV. fig. P.)MargineUa ( Glabella) picturata, G. ^ H. Nevill, Journ. As. Soc. Bengal,1874, vol. xliii. pt. 1>, p. 23, vol. xliv. pi. 8. f. 89; copied by Weinkaitff,Couch.-Cab. pi. 22. tigs. 13, 14.Poivre Island, Amirantes, in 20 fms. ; Mauritius (Nevill).A very pretty specimen from Poivre Island is somewhat differentlypainted, the spots upon the white zones being curved oralmost arrowhead-shaped, and in four series upon the body- whorltwo of these, namely one a little below the suture and the otherjust beneath the middle, are less distinct than the others, whichfall above and below tho lower more indistinct one. Tho outer liphas a fourth red spot at the upper extremity, and the anterior endof the columella is tinged with the same colour.57. Dolium (Malea) pomum, Limif}.Olorioso Islands, on reefs, dead.2 k 2