508 THE EXHIBIT 



tute the basis of the active part of the locomotor apparatus and how these 

 muscle segments are represented by the primitive segments of the human 

 embryo. 



Wall Chart 2 shows a graded series of living animals forming an "Echelle 

 des Etres" from fish to man; beneath this are the descending geologic ages 

 and the staircase of fossil forms leading to older and older ages, with lines 

 suggesting their genealogical relations with the living forms. 



Case III sets forth "The Skeleton from Fish to Man" in a series of nine 

 skeletons, beginning with a generalized fossil fish. 



Wall Chart 3 comprises restorations of these same forms as they may have 

 appeared in life. 



Case IV A deals with the "Maintenance of the Upright Posture" in man 

 and is concerned chiefly with the muscles of the back and limbs. In Case 

 IV B one may examine a series of pectoral and pelvic girdles and limbs of 

 vertebrates, showing how these structures have evolved out of the bases of 

 the primitive steering planes of primitive fish. 



Wall Chart 4 depicts the general body-form and relative length of limbs of 

 the anthropoid apes in comparison with man. The late foetal stages of the 

 same forms are also represented and the point is evident that in general 

 appearance the foetal stages are less unlike than the adult stages. 



Case V A, "Hands and Feet of Primates," deals with the muscular anat- 

 omy and external form of primates up to man. 



Case V B, "Embryology" shows models and diagrams of human and other 

 embryos, embryonic membranes, etc. 



Wall Chart 5 is entitled "Comparative Embryology from Fish to Man." 

 It depicts the chief stages from the undivided egg to the adult in shark, lung- 

 fish, salamander, lizard, opossum, monkey (macaque), man. It is based 

 on the most recent embryological material as figured by contemporary 

 authors. 



Case VI contains first a series of models of heads of vertebrates represent- 

 ing successive grades of organization and illustrating the evolution of the 

 face; next are five tablets showing a series of models of skulls illustrating 

 the evolution of the skull as a whole and of many of its individual elements; 

 next, a series of models based on the dissections of facial muscles by the late 

 Dr. Ernst Huber of the Johns Hopkins Medical School. 



Wall Chart 6 is a sort of genealogical tree entitled "Man among the Pri- 

 mates." It is practically an illustrated classification giving life-like color 

 sketches of the principal types of lemuroids, Tarsius, New World monkeys, 

 Old World monkeys, anthropoid apes and man. 



Case VII A deals with "Skulls, Jaws and Teeth." There is first a syn- 

 optic series of models of the principal known skulls and jaws of fossil pri- 



