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. aimilis. 



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



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



aa. Umbilicus reduced to a perforation partly closed by the 



reflexed columella, or wholly closed and imperforate. 



b. Imperforate; base depressed; alt. 11 5-12, diam. 

 5i-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 Sag da. 



[See pi. 16, figs. 11-1 3, 8. eookiana ; pi. 16, figs. 14, 15, 8. alligam 

 pi. 16, figs. 16, 17, '8. connectens] pi. 16, figs. 18-20, 8. similis.] 



S. eookiana Gmel., iii, 6. 



australis Chem., auct. 



eonica Swains. 



epistylium Dillw., Sowb. 



foremaniana Rve. 

 S. foremaniana C. B. Ad., iii, 7. 

 S. pila C. B. Ad., iii, 8. 

 S. triptycha Shuttl., iii, 7. 

 S. alligans C. B. Ad., iii, 6. 



epistylium Pfr. & Rve., not 



/ alveolata Beck. [Mull. 



S. connectensC. B. Ad., iii, 6. 

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



v. delaminata Ad. 

 S. ambigua C. B. Ad., iii, 9. 

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

 S. epistylioides Fer., iii, 6. 

 S. jayana C. B. Ad., iii, 6. 



f alveolata Beck (undesc.). 



eookiana Pfr. 



alligans Rve. 



say ana Alb. -Martens. 

 . / eonica Swains. 

 S. alveare Pfr., iii, 7. 

 S. spiculosa Shuttl., iii, 7. 

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



(Section Hyalosagda). 



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

 S. haldemaniana Ad., iii, 8. 

 arboreoides Ad. 



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

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



