BOYSIDIA. 193 



d 1 . Angular and parietal separate and par- 

 allel; length 3 mm. B. lamothei, no. 7. 

 c 1 . Peristome continuous across the parietal wall. 

 d. Small, length less than 2.5 mm.; an- 

 gular and parietal lamellae long and 

 parallel. 



e. Aperture rounded-triangular with 

 7 teeth; surface most minutely 

 granular in spiral lines; alt. 1.8, 

 diam. 1.4 mm. B. paviei, no. 8. 

 e 1 . Aperture similar, with 9 teeth; 

 granulation uniform; shell nar- 

 rower; alt. 2.2, diam. 1.5 mm. 



B. landurensis, no. 9. 

 e 2 . Aperture subcircular, 8 teeth ; alt. 

 1, diam. 1.1 mm. B. dayana, no. 10. 

 d 1 . Larger, length 3 to over 5 mm. 



e. Angular lamella low, converging 

 to the parietal within ; space be- 

 tween upper and lower palatal 

 plicae concave; about 6 teeth; alt. 

 3.2, diam. 2.5 mm. 



B. kelantanensis, no. 13. 

 e 1 . Angular and parietal lamellae 

 parallel. 



/. 4 to 5 mm. long, with 5 whit- 

 ish teeth. 



B. salwiniana, no. 12. 

 f 1 . 3 mm. long. 



g. An impression behind 

 the outer lip, as in 

 Vertigo antivertigo. S. 

 W. Hupe. 



B. hupeana, no. 11. 

 J7 1 . No impression; about 

 9 teeth. Java. 



B. bocttgeri, no. 14. 



