EMARGINULA. 267 



posterior margin ; ribs large, rounded. The ribs, particularly the 

 six or eight posterior ones, are large and rounded, the interstices 

 deeply pitted. {Soivb.) 



Sandwich Is. 

 E. clathrata Sowb., Thes., p. 212, f. 54 and Conch. Icon., f. 35, 

 not of Pease. 



E. eximia A. Adams. PI. 28, fig. 26. 



Elongate-oval, much depressed, white, subpellucid ; vertex pos- 

 terior, inclining backward; with distant, prominent, scaly-nodose 

 radiating ribs, interstices widely cancellated with transverse and 

 longitudinal ribs ; the whole surface beautifully decussated with 

 radiating and concentric lines ; margin of the aperture denticulate, 

 deeply incised in front. Remarkable for the large regular pits be- 

 tween the ribs. {Ad.) 



San Nicholas, Zebu, Philippines, under stones at low water. 



E. eximia A. Ad., P. Z. S. 1851, p. 86, no. 33.— Sowb., Thes., p. 

 212, f. 63. 



E. obovata A. Adams. PI. 28, fig. 11. 



Elongate, obovate, depressed-conical, testaceous, summit subcen- 

 tral, inclined backward ; cancellated with scaly radiating riblets 

 and elevated concentric lira? ; aperture rounded behind, narrowed 

 in front, margin creno-denticulate, deeply incised in front. Shortly 

 cancellated, the slit very long. {Ad.) 



Catbalonga, Is. of Samar, Philippines, 4 fms., on stones. 



E. obovata Ad., P. Z. S. 1851, p. 83, no. 16.— Sowb., Thes. p. 

 212, f. 6; Conch. Icon. f. 2 b 



E. aculeata A. Adams. PI. 28, fig. 23. 



Elongate-oval, depressed, rufescent, vertex a little behind the 

 middle, inclined backward ; with prominent, spiny-roughened radi- 

 ating ribs, interstices deeply latticed ; margin of aperture denticu- 

 late, fissure profound. Not so enlarged posteriorly as E. obovata. 

 {Ad.) 



Habitat unknown. 



E. aculeata Ad., P. Z. S. 1851, p. 86, no. 36.— Sowb., Thes. p. 

 212, f. 58; Conch. Icon. f. 49. 



The narrow brown rays give a sprightliness of appearance to this 

 little species, says Sowerby. 



