U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 89 PLATE ]', 



SPECIES AND SUBSPECIES OF OPISTHOSI PHON (CU BITASI PHON A) (X 4). 



1, apertum: 2, tersum: 3, paredonense escalerense: 4, tersum: 5, paredonense paredonense; 6,berryi tranjitonum: 



7, deviatum; S. berryi viguetense; 9, berryi berryi (type of semiapertum); 10, berryi berryx. 



