379 



The vesicles in Fig. 1 are irregular in shape, though each is 

 surrounded with a regular row of epithelical cells. Colloid is scarce 

 in these vesicles, though it is undoubtedly present in some of them. 



The most noticeable feature about the thyroid tissue which has 

 developed from parathyroid is the irregular shape of the vesicles, but 

 the appearance thus presented is strikingly similar to that which is 

 found in the thyroid gland after parathyroidectomy. (See Fig. 3.) 



The four drawings, appended, in our view prove conclusively an 

 intimate morphological relationship between thyroid and parathyroids. 



It is of special interest to record the subsequent history of the 

 dog under experiment whose parathyroid is shown in Fig. 1. 



After removal of the altered parathyroids the animal showed 

 practically no symptoms for a month, but after this period it developed 

 tremors, became restless and idiotic, and suffered from conjunctivitis, 

 loss of hair and eczema. Death occurred forty-four days after the second 

 operation, and there was no typical tetany at any time. All this points 

 to the view that thyroid and parathyroid are to be looked upon as 

 one apparatus. 



We hope to publish before long a fuller account of this work, 

 with references to the literature on the subject. 



We have to thank Professor Swale Vincent for his assistance 

 and advice. 



Nachdruck verboten. 



Osservazioni sulla morfologia dei vasi linfatici degli arti nei 



mammiferi. 



Pel Dr. Antonio Pensa, aiuto e libero docente. 



(Istituto anatomico della R. Universita di Pavia diretto dal 



prof. LuiGi Sala.) 



Con 6 figure. 



Delle mie ricerche dirette a studiare la morfologia del sistema 

 linfatico espongo, per ora in modo riassuntivo, il risultato di quelle 

 riguardanti i linfatici degli arti. 



Giä riferendo i miei studii sulla morfologia della cisterna chili e 

 del ductus thoracicus i), feci rilevare come non fossero state fatte 

 ricerche condotte con metodo e coordinate in modo da poter servire 



1) A. Pensa, Studio sulla morfologia e sulla topografia della cisterna 

 chili e del ductus thoracicus ecc. In: Ricerche Lab. Anat. Roma ed 

 altri Lab. biol., Vol. 14, 1908. 



