THE NAUTILUS. 71 



lished in Biological Bulletin, May, 1910. Tower found two closely 

 allied beetles occupying different sides of the Mexican table-land, 

 and was able to cross them, getting various combinations in the off- 

 spring, an interesting feature being that the larval characters were 

 inherited separately, so that in one experiment four different kinds 

 of larvae each gave the same three kinds of adults. The account of 

 the experiments is not altogether clear and consistent, but it is evi- 

 dent that among these beetles related forms may cross quite freely, 

 and produce fertile progeny presenting new combinations of the 

 parental characters. As Messrs. Pilsbry and Ferriss have indicated, 

 it is not unlikely that similar phenomena occur among snails, and 

 no doubt there is a rich field open to the experimental breeder. 



The two papers before us give an account of the snails of the 

 Huachuca and Chiricahua mountains. The first Huachuca snails to 

 be collected were species of Ashmunella (J.. varicifera and levettef), 

 obtained by Messrs. Cox and Levette, and reported as from " Tucson " 

 and " near Santa Fe, New Mexico," respectively. It is now defi- 

 nitely ascertained that they are confined to the Huachucas. The 

 authors state that they know nothing of Cox beyond his name upon 

 the label, but he was doubtless the Cox who was known to entomol- 

 ogists as a collector of cynipid galls, one of the gall-flies being named 

 after him by Bassett. The first Chiricahua mollusc was obtained by 

 Vernon Bailey, and was described by Stearns in 1890 as Holospira 

 arizonensis. The richness and individuality of the snail-faunae of 

 these ranges is well brought out by the following table, which in- 

 cludes species only : 



Huachucas only. Both ranges. Chiricahuas only. 



Sonorella . . 4 6 



Ashmunella .4 9 



Oreohelix . . 1 3 



Pyramidula .1 1 



Helicodiscus .0 1 



Radiodiscus .0 1 



Punctum . . 1 



Thysanophora 11 



Holospira . . 1 3 



Agriolimax .0 1 



Vitrina ... 1 



Zonitoides . . 3 



