218 LUNTIA. 



i ' This species has not, as far as I can ascertain, ever been 

 fully characterized, the diagnosis of Gray, consisting of five 

 words only, being totally inadequate. It may be described as 

 pupiform, pale olive-brown, narrowly rimate, sculptured with 

 rather strong oblique lines of growth. The whorls are six and 

 a half to seven in number, rather rapidly enlarging, convex, 

 divided by a deep oblique suture. The spire has curved 

 outlines, and terminates above in an obtuse rounded, smooth 

 apex. The aperture is rather large, and occupies somewhat 

 less than a third of the total length. The peristome is thin, 

 narrowly reflexed on the left of the aperture, and rather 

 broadly expanded in the umbilical region, and has the ex- 

 tremities, which converge but very slightly, connected by a 

 thin callus spread over the whorl. Length 8 mm. ; diam. 

 31/2; length of aperture 2y 3 , width 2." (E. A. Smith.) 



Tristan d'Acunha (Capt. Carmichael) ; Inaccessible Island, 

 Tristan d'Acunha (Challenger Exped.). 



Balea ventricosa Leach Mss., GRAY, Zoological Journal i, 

 p. 62, pi. 6, f. B. Pfr., Monogr. ii, p. 389. Pupa v., GRAY, 

 Ann. of Philos. ix, 1825, p. 413. B. (Tristania) v., SMITH, 

 P. Z. S. 1884, p. 278. 



Genus LUNTIA E. A. Smith. 



Journal of Conchology ix, p. 28, Jan. 1898, for L. 

 insignis. 



1 1 Shell elongate, slender, imperf orate ; columella twisted, 

 obliquely truncate in front, covered with a reflexed callus; 

 outer lip conspicuously sinuate above at the suture, slightly 

 thickened below the sinus " (Smith). 



"This genus of Stenogyridcz is allied to Subulina, but is 

 distinguished by the sinus at the upper piart of the labrum. ' ' 

 (Smith). The single species is from Trinidad. 



1. L. INSIGNIS Smith. PL 40, fig. 7. 



Shell small, long, slender, imperforate, white, the apex 

 mammillate. Whorls 7, the first two large, smooth, the rest 

 convex, sculptured with delicate arcuate riblets, more or 

 less running out below, projecting above at the sutures. Ap- 

 erture small, inversely auriform; columella arcuate twisted 



