472 C. JUDSON HERRICK 



same page. On page 41 the cochlea and possibly the sensory 

 surfaces of the organs of smell and taste are said to migrate 

 outward from the anterior part of the medullary tube. On 

 page 58, line 2 from the bottom, for "spinal" ganglion of the 

 cochlea, read spiral ganglion. 



The chapters on the nervous tissues comprise a total of 62 

 pages. There are numerous good figures illustrating the nervous 

 system and its elements, accompanied by a running description 

 and lists of names of the parts figured; but here again there is 

 a dearth of functional interpretation, and the reader who 

 attempts to assimilate this description with no previous prepar- 

 ation in biology may find it rather indigestible. The neurological 

 chapters contain a few infelicitous expressions, such as the 

 following : 



There are several places in the descriptions of the nerves 

 where the terms afferent and efferent are confused, some of 

 these apparently being misprints. On page 82 we read, "Only 

 four of the cranial nerves are, like the spinal, 'mixed nerves.' 

 Of the other eight, three are pure afferent, or 'sensory,' and 

 five are efferent, or 'motor'." But in the enumeration which 

 follows the I, II and VIII pairs are described as afferent and 

 the III, IV, V. VI, VII, and IX pairs are correctly described as 

 mixed. There is no mention here of afferent fibers in the vagus 

 and the "afferent axons of the spinal accessory" are said to 

 supply the sterno-mastoid and trapezius muscles. On page 90, 

 however, the afferent fibers of the vagus are referred to. On 

 the page last mentioned the account of visceral fibers of the 

 VII and X nerves is incorrect. The recent studies of Molhant, 

 Yagita, Kosaka and others have clarified the relations of these 

 systems. 



The final chapter on the Functional Interrelation of Receptors, 

 Neurons and Effectors is a very successful application of the 

 author's cardinal principle (as stated in the Preface), that the 

 body must be considered as a functional unit, and that this is 

 even more important for psychology than for physiology. It 

 is to be regretted that this principle, which is so well stated 

 in general terms in this chapter, was not applied more explicitly 

 and concretely in the descriptive part of the work. This brief 

 final chapter alone is worth the price of the book. 



