214 



PROCEEDINGS OF THE NATIONAL MUSEUM 



The type, U.S.N.M. no. 428801, was collected by Bartscli under a 

 grant from tlie Walter Rathbone Bacon Traveling Scholarship in 



FiGDRE 73. — Distribution of tlie subspecies of Ghrondropometes (ChrondnAhyroma) exim- 

 ium: (1) aiuiw^ticulum; (2) mallcatum; (3) eximium. 



1928, in a small ensenada in the Sierra San Carlos east of the southern 

 extremity of the Sierra de los Acostas. It has 3.8 whorls remaining 

 and measures: Length, 22.3 mm; greater diameter, 22.0 mm; lesser 

 diameter, 14.5 mm. 



