J. 1MBRIE 



I :}5 



urements of two species of the modern marten Mustela indicated 

 that the amount of morphological overlap between two sub- 

 species is much greater than that between two species, showing 

 that osteological data alone reflect a classification (Allen, 1938) 

 based on geographic, eeologic, and pelage data. With this in 



100 r 



95 



90 



85 



80 



75 



v 

 I 



70 



25 



C/L 



30 



35 



40 



45 



50 



Fig. 6. Diagram showing estimated morphological ranges of seven pop- 

 ulations of the arcid pelecypod Anadara. H, maximum distance between 

 two lines parallel to the hinge; L, shell length; C, maximum depth of one 

 valve. Ellipses are statistical estimates of ranges to include 95% of the total 

 population ranges. Populations from Kojima Bay, Ariake Bay, and Dutch 

 Borneo are recent. Other populations are fossil. Samples from Dutch Borneo 

 and Minato silt (1) are assigned to Anadara granosa granosa; from Kojima 

 and Ariake Bays to Anadara granosa bisenensis; and those from the remain- 

 ing areas to Andara obessa (Kotaka, 1953). 



