64 SAGDA. 



II. Aperture lacking internal teeth or laminae. 



a. Umbilicus moderate, its breadth contained 9-15 times in 

 diameter of shell. 



b. Diam. 13-16, alt. 7-9 mill. similis. 



bb. Diam. 9-10, alt. 5-5 mill. hollandi. 



bbb. Diam. 3-4, alt. li-H mill. brevis. 



act. Umbilicus reduced to a perforation partly closed by the 



reflexed columella, or wholly closed and imperforate. 



b. Imperforate; base depressed; alt. 11412, diam. 

 5=1-7 mill. osculans v. delaminata. 



bb. Perforated ; base convex, well impressed in the 

 middle. 



c. Diam. 11-12 mill. haldemaniana. 



cc. Diam. 9-10 mill. ambigua. 



Species of Sagda. 



[See pi. 16, figs. 11-13,$. cookiana ; pi. 16, figs. 14, 15,$. alligans ; 

 pi. 16, figs. 16, 17, S. connectens; pi. 16, figs. 18-20, S. similis.'] 



S. cookiana Gmel., iii, 6. v. delaminata Ad. 



australis Chem., auct. S. ambigua C. B. Ad., iii, 9. 



cornea Swains. S. lamellifera C. B. Ad., iii, 8. 



epistylium Dillw., Sowb. S. epistylioides Fer., iii, 6. 



foremaniana Rve. S. jayaua C. B. Ad., iii, 6. 

 S. foremaniana C. B. Ad., iii, 7. / alveolata Beck (undesc.). 

 S. pila C. B. Ad., iii, 8. cookiana Pfr. " 



S. triptycha Shuttl., iii, 7. alligans Rve. 



S. alligans C. B. Ad., iii, 6. sayana Alb.-Martens. 



epistylium Pfr. & Rve., not f cornea Swains. 



/ alveolata Beck. [Mull. S. alveare Pfr., iii, 7. 



S. connectens C. B. Ad., iii, 6. S. spiculosa Shuttl., iii, 7. 



S. osculans C. B. Ad., iii, 8. S. torrefacta C. B. Ad., iii, 7. 



(Section Hyalosagda^). 



S. similis C. B. Ad., iii, 9. S. hollandi C. B. Ad., iii, 9. 



S. haldemaniana Ad., iii, 8. S. ? brevis C. B. Ad., iii, 9. 



arboreoides Ad. 



