GENETIC TYPE AND THE ENDOCRINES 71 



or even by their own masters, avoid being caught and fre- 

 quently run away. They are typically negative in their in- 

 stinctive response and are often unwilling to do the master's 

 bidding. Such a reaction is sometimes interpreted by trainers 

 as a lack of intelligence or inability to learn. However, this 

 estimation is based entirely on misinterpretation; the Saluki 

 is a truly intelligent dog and appreciates the situation quickly, 

 but is an unwilling negative individual not at all times in- 

 terested in the things the trainer may wish him to do. A 

 docile agreeable dog may learn the task set by a trainer more 

 readily than a less agreeable animal, yet this does not nec- 

 essarily indicate differences in intelligence since the degree 

 of attention to the task is of different magnitude in the two 

 cases. The degree of attention measures interest in the given 

 problem rather than intelligence of the individual. 



In physical form, the Saluki is extremely lank, slender and 

 greyhound-like (see fig. 1, plate 10). The head is long, with 

 a slender but strong muzzle, and the body is thin and deep 

 chested, the ribs having a tendency to show even when the 

 animal is well fed. The Saluki, among all the dogs, is more 

 nearly comparable to what one may think of among persons 

 as an individual with a highly active thyroid the normal 

 high-thyroid type. It is alert though not nervous, and is 

 par excellence the linear typed individual. The long bones of 

 the limbs are slender and of dense hardness. The muscles 

 are also long, drawn out, and slender, yet the animal has 

 great strength. A 30 kilo Saluki can support the sudden 

 weight of a 70 kilo man upon its back. 



The legs of the Saluki are proportionately longer than those 

 of the shepherd dog and are also much slenderer. The ratio 

 of circumference to length in the leg bones of the Saluki is 

 only about half that of the shepherd, and the contrast between 

 the long, slender leg of the Saluki and the short, chondro- 

 dystrophic leg of the bassethound is extreme. Saluki bone 

 growth deviates from the standard control in an opposite 

 direction from chondrodystrophy. The questions arise: will 

 the verv slender Saluki bone be affected bv the inheritance 



