ALVEOLI OF THE SALIVARY GLANDS. 427 



which is in contact with the membrana propria. I have seen 

 these caudate nuclei in perfectly fresh specimens. The sub- 

 maxillary gland of the rabbit or pig is best adapted for their 

 demonstration. The existence of the processes of the nuclei 

 has been corroborated by C. Otto Weber, as well as by Boll, 

 whilst by Kolliker and Heidenhain, though undoubtedly in- 

 correctly, it is denied. The latter,* it is remarkable, has him- 

 self drawn a thick process, attached with such remarkable 

 distinctness to the nucleus of an isolated salivary cell, receiving 

 as it leaves this a sheath of the cell membrane, that, upon the 



Fig. 75. 



Fig. 75. Isolated alveoli of the Rabbit, exhibiting processes. Magni- 

 fied 480 diameters. 



ground of this positive observation alone, I should draw the 

 conclusion that the process is frequently not seen in connection 

 with the cell, because it is destroyed in putting up the prepa- 

 ration. The nuclear process appears to be hollow, since it often 

 discharges a large quantity of tenacious material, which clearly 

 proceeds from the nucleus. In consequence of the nuclear 

 process leaving the cell, it gives the latter the appearance of 

 being stalked, as has been seen by Schliiter, myself, Gianuzzi, 

 Boll, and Kolliker. According to the descriptions given by 

 Schliiter and myself, the cell processes are often of great length, 

 branch, coalesce (Schluter), and support the alveolar cells like 

 berries. 



There is never more than one nucleus in each salivary cell. 



* R. Heidenhain, Studien des physiologischen Instituts zu Hreslau, 1858, 

 Taf. iv., fig. 13 x. 



H H 



