102 



University of 3Iichigan 



aBimodal: 11.5 and 12.5; bbimodal: 19.7 and 21.5; cbimodal: IS.S and 21.5. 



Cerion uva knipensis, new subspecies 



Type locality: (CblTb) valley between Seroes Palomba and 

 Baha Hoendoe, northern Curasao. 



Distribution: Curacao; north of Seroe Grandi; both on 

 limestone (014^20), and in the higher hills on outcrops of 

 the older rocks (Cbl6, 17, 20). Similar in habits to uva, but 

 burroAving more deeply in the talus of the older rocks. 429 

 adults collected. 



This subspecies (Plate XIX) has higher whorls than typical 

 uva. In the statistical study, the data for each lot were ar- 

 ranged in three tables, with vertical columns for the whorl 

 classes and transverse rows to indicate, in the different tables, 

 the altitude, major diameter and index classes (c/. Table XI). 

 This brought out the fact that, in C. uva uva, the altitude was 

 very closely correlated with the number of whorls, but did not 



