1878.] LAND AND MARINE SHELLS. 313 



A beautiful species, characterized by its closely granulated sculp- 

 ture, and the rosy coloration of the mouth. 



ROSTELLARIA LUTEOSTOMA, 11. Sp. (Plate XVIII. figS. 8, 9.) 



Shell fusiform, solid, light brown, paler below the sutures ; spire 

 attenuated, apex sharp-pointed; whorls 15, the first 9 or 10 

 longitudinally strongly plicate, those nearest the apex being cancel- 

 lated with fine transverse ridges, the lower whorls nearly smooth, 

 with a few concentric grooves near the base or the last whorl ; colu- 

 mella covered with a strong tumid polished callus ; outer lip with 5 

 digitations on the lower half of the margin ; posterior canal extend- 

 ing upwards beyond the centre of the third whorl ; beak moderate, 

 nearly straight in the young shell, somewhat curved outwards in 

 the adult ; aperture golden yellow, deepest on the lower portion of 

 the columella. 



Length 4 inches 3 lines, diam. 1 inch 3 lines. 



Hub. Kurrachi, near the mouth of the Indus. 



This beautiful shell forms an interesting addition to the restricted 

 genus Rostellaria (Gladius of Klein), of which hitherto only about 

 half a dozen recent species have been described. 



All the known species inhabit the Asiatic seas, none having beeu 

 met with in any part of the New World. The two examples (one 

 young and the other in the adult state) from which I have taken my 

 description, are from the collection of Sir David Barclay, and are, so 

 far as I am aware, unique in this country. 



Mitra (Costellaria) lincolnensis, n. sp. (Plate XVIII. 

 figs. 10,11.) 



Shell acuminately fusiform, solid, whitish, tinged with irregular 

 longitudinal chestnut flames, with a narrow band of interrupted spots 

 encircling the centre of the whorls, the lower half of the last whorl 

 chestnut, with a faint band of reticulated brown and white spots in 

 the middle ; whorls 7, a little convex, with numerous, stout, rounded 

 longitudinal ribs, which are slightly nodulous below the sutures ; 

 interstices smooth, sutures impressed ; spire longer than the aperture; 

 outer lip simple, a little contracted below ; columella with 4 strong 

 plaits, the posterior one the largest : basal canal short, slightly re- 

 curved. 



Length 7, breadth 2 lines. 



Hab. Port Lincoln, South Australia. 



Mitra schomburgki, n. sp. (Plate XVIII. figs. 12, 13.) 



Shell ovately fusiform, moderately solid, strongly longitudinally 

 ribbed, the ribs becoming nearly obsolete towards the lower portion 

 of the last whorl, livid brown, with a broad pale suffused band on 

 each whorl and four narrow dark brown lines encircling the last 

 whorl, one above and three below the band ; whorls 6^, convex ; 

 spire turreted ; sutures impressed ; aperture subovate, equal in 

 length to the spire ; outer lip simple, arcuate, sulcate internally ; 



