190 REVIEWS. 



The arguments for the vertebral theory of the skull are given and 

 tacitly agreed upon as plausible, although they have been repeatedly 

 shown to be unreal. The presence of the "os centrale" in the human 

 embryo and other facts of a similar nature are not emphasized in relating 

 man to lower forms, although the adapter is continually relating the dif- 

 ferent animals forms with one another. A serious omission is found on 

 page 249 in the enumeration of the senses, where the muscle sense is not 

 even mentioned, and pleasure and pain sensations are denied a place. 

 There is no suggestion of visceral sensations, the "yearning of the bowels," 

 that is so real in man. 



But one learns a great deal by further perusal when on page 393 the 

 capillaries are said to be "surrounded by contractile structures analogous 

 to the smooth muscle-fibers of the larger vessels and consisting of branched 

 muscle-cells which are under the control of the nervous system." 



However, the climax is reached on page 492 where the adrenal bodies 

 are treated of in connection with the urinogenital organs because of the 

 '•difficulty of knowing in what other connection to describe them." This 

 brings us to a serious consideration of the classification of the so-called 

 ductless glands, or the glands furnishing internal secretions to the. blood. 

 Anatomists might safely follow the physiologists and arrange such glands 

 under the head of ductless glands. The following scheme is presented 

 with the hope that it will clear up some obscurity in regard to the 

 internal secretions, and serve as a ready means of facilitating the learn- 

 ing of the thirteen ductless glands of the human body. 



ACCESSORY BLOOD GLANDS. 

 I. PKODUCE INTERNAL SECRETION. 



a. Ductless glands: Thyroids, parathyroids, adrenal bodies, pituitary 

 body. 



b. Glands with ducts: Liver, kidney, pancreas, testicles, ovaries. 



c. Other glands: Stomach, intestines. 



II. FUNCTION UNDECIDED. 



a. Ductless glands: Spleen, thymus, pineal body, carotids, coccygeal. 



b. Glands with ducts. 



c. Other glands: Lymph, haemolvmph, bone marrow? 



Eobert Bennett Bean. 



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