6i Dr Craigie's Obscrvniioii.s on the 



" Ad banc naturae providentiani quanidam equorum venam 

 alias pertinere credidi ; quae, cum artificii et admirationis plena 

 sit, nee delectatione ac fructu careat, quamvis ad ihoiacera alen- 

 dum instituta, operas pretium est, ut exponatur. Itaque in illis 

 animantibus, ab hoc ipso insigni trunco sinistro juguli, qua pos- 

 terior sedes radicis venae internae jugularis spectat, magna quae- 

 dam propago germinal, qusc, praiterquam quod in ejus origine 

 ostiolum semicirculare habet, est etiam alba, et aquei hnmoris 

 plena ; nee longe ab ortu in duas partes scinditur, paulo post 

 rursus coeuntes in unam qua? nullos ramos diffundens, juxta si- 

 nistrum vertebrarum latus, penetrato septo transverso, deorsum 

 ad medium usque lumborum fertur ; quo loco latior effecta, 

 magnamque arteriam circumplexa, obscurissimum finem, mihi- 

 que adhuc non bene perceptum, obtinet."" — De Vena sine Pari. 

 Aiitigr. xiii. 



In the same treatise he describes the situation and appearance 

 of the large membranous fold in the right auricle, which still 

 bears his name, and the small one at the beginning of the co- 

 ronary vein. 



His researches on the organ of hearing are original and in- 

 teresting. In the tympanal cavity he described the internal 

 muscle of the malleus^ already delineated by Vesalius, and 

 named the tensor tympan'i ; the stapes and its muscles, and the 

 tympano-pharyngeal tube which communicates with the pha- 

 rynx, and which still retains his name. He first delineated 

 the coclilea and its osseous plate. 



Important, however, as were these discoveries to anatomical 

 science, they form but an inconsiderable part of the labours of 

 Eustachio. Assiduously devoted to the cultivation of human anor- 

 tomy, and actuated also, we must admit, by a feeling of envy 

 at the growing reputation of Vesalius, he undertook to illustrate 

 the true and accurate structure of the human body, in a series of 

 delineations representing the shape, size, and relative position of 

 the different organs of which it is composed. This task, after 

 years of assiduous dissection, he completed, in thirty-nine plates, 

 in the 1552, nine yeai's after the first impression of the work of 

 Vesalius. But it was unfortunate, both for his just reputation 

 and for the progress of anatomical knowledge, that he was un- 

 able to pubUsh them during his life. At the period of his 

 death, in 1574, he bequeathed ihem to his friend Pini, of the 



