May 7, 1909] 



SCIENCE 



745 



tween two " tliorouglibred " dogs. The breeds 

 were sharply contrasted in many characters 

 and the results were so striking that an effort 

 has been made to collect the data regarding 

 the offspring, from the owner o£ the dogs. 

 While the data thus obtained are of course 

 very incomplete, they are considered of suffi- 

 cient interest to merit a brief record. Prac- 



tically nothing of a scientific character appears 

 to have been done in this very interesting field 

 for students of heredity. 



The mother of the cross in question was an 

 Old English Bobtailed Sheep Dog and the 

 father a Scotch Collie so-caUed. Both were 

 typical specimens of their respective breeds. 

 The dogs were accompanied by a guarantee 



