Wymaii.] 



262 



[June 5- 



ilium as the serial homologue or homotype of the scapula, the pubes 

 of the clavicle and the ischium of the coracoid. 



rig. 7. 



Fig. 8. 



Fig. 7. 



Fig. 8. 



Scapular arch of a frog. A, scapula; b, clavicle; c, coracoid. 

 Pelvis of a chameleon. A, ilium; b, ischium; c, pubes. 



Charles Martins compares the bones of the two arches in the fol- 

 lowing manner ; "The reader may place the shoulder of one side re 

 versed over the ilium of the opposite ; or what amounts to the same 

 thing, he may place on his left an ilium of the right side, and on his 

 right the reversed scapula of the same side. The outer surfaces of 

 the two bones will then be opposite to him, and maybe studied in this 

 position, the spectator being between the two."* Any one Avho will 

 follow his directions with the bones in his hands, Avill find that the two 

 ways above mentioned do not amount to the same thing. In the first 

 method, the glenoid and cotyloid cavities will face in the same direc- 

 tion, and in the second in opposite directions. In the last these posi- 

 tions will be symmetrical, but not in the first. After comparing the 

 axillary border of the scapula with the inguinal border of the ilium, 

 the coracoid with the ischium, and the clavicle with the pubes, he con- 

 cludes as follows : "En resume I'homologie de I'epaule et du bassiu me 

 parait complete. Un ceinture massive, soudee a la colonne ver- 

 tebrale, se'st renversee et transformee en un appareil leger et mobile 

 suspendu dans les chairs." f 



* Xouvelle Comparaison des 3Iembres Pelviens et Thoraciques chez I'homme et 

 Chez les ilammiferes. Par Charles Martins. Extrait des Mem. de I'Acad. des Sci- 

 ences de Montpellier. T. in. p. 515. 



tibid. p. 518. 



