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PROCEEDINGS OF THE NATIONAL. MUSEUM 



VOL. 85 



having this sculpture stronger and especially by having the inner 

 peristome much expanded and thickened and the outer separated from 



3 ^Isaba./ Alarid 



£zas 



o / s. 3 4- ^ 



mtles 



4 oL^guv'illa.s 



Figure 95. — Distribution of the subspecies of Chondrothyretes incrassata: (1) incrasaata; 

 (2) subincrassata ; (3) aurantiaca; (4) fumata. 



the parietal callus by an inbent channel at the posterior angle, causing 

 the outer peristome to project at a point. 

 Distribution of the subspecies of G. incrassata is shown in figure 95. 



