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 J mill. hollandi. 



bbb. Diam. 3-4, alt. 1-H mill. brevis. 



aa. Umbilicus reduced to a perforation partly closed by the 



reflexed columelJa, or wholly closed and imperforate. 



b. Imperforate; base depressed; alt. lli-12, diam. 

 5 i-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, S. cookiana \ pi. 16, figs. 14, 15 f 8. alligans; 

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



S. cookiana Gmel., iii, 6. 



austral is Chem., auct. 



conica 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. connectens C. 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.). 



cookiana Pfr. 



alligans Rve. 



sayana Alb.-Martens. 



f conica 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. 



