LAMELLOVUM. 131 



Genus LAMELLOVUM Pilsbry. 



Lamellovum PILS., Nautilus, xxiii, March, 1910, p. 123, for 

 Tornatellina globosa. 



The shell is imperforate, broadly ovate, of rather numerous 

 (about 6) whorls ; parietal lamella long columella thick, bear- 

 ing several deeply entering lamellae ; palatal plicae developed. 

 Apical whorl small, spirally striated. Type Lamellovum glo- 

 bosum. 



This genus is proposed for a peculiar species having the 

 apertural armature much more complex than in Elasmias, 

 the columella bearing numerous long, entering lamellae. The 

 whorls are more numerous and the apex smaller than in Elas- 

 mias. The eggs or young at birth must be relatively smaller 

 than in Elasmias, on account of the very narrow spaces be- 

 tween the teeth. 



1. L. GLOBOSUM (Petit). PI. 28, figs. 9-12. 



Shell ventricose-conic, pellucid, buff-greenish. Whorls 6 to 

 7, flattened, the last largest, ventricose, paler. Spire acutely 

 conic. Aperture semilunar, ringeiit. Columella provided 

 with a larnelliform tooth above the middle, margined by a 

 tooth below, sometimes double, plicate at the base, the plica 

 emarginate in front, bilobed, the upper lobe ascending, the 

 lower subhorizontal ; outer lip acute. Length 4, diam. 3 mm. 

 (Petit.} 



Shell globose-conic, rather solid, striatulate, greenish-buff; 

 spire conic, rather acute; suture very slightly impressed; 

 whorls 7, rather flattened, the last nearly as long as the spire, 

 subglobose. Aperture elliptical-semioval, obstructed by four 

 folds : one obliquely entering parietal fold, somewhat doubled 

 below; a second strong, short, emarginate sub-bilobed on the 

 columella, and two obsolete plicae in the palate. Length 4 to 

 4%, diam. 3 mm.; aperture 2*/4 mm. long (Pfr.). 



Island of Opara [Eapa], under stones (Cuming). 



Ela>smatina glolosa PETIT DE LA SAUSSAYE, P. Z. S., 1843, 

 p. 2. Tornatellina globosa KUESTER, Conchyl. Cab., p. 154, 

 pi. 18, figs. 26, 27. PFR., Symbolae, iii, p. 60 ; Monogr., ii, p. 

 393 ; iii, p. 527 ; iv, p. 652 ; vi, p. 265. 



