FORMS OF THE SPERMATOZOA. 141 



Both the uni- and the multi -nucleated seminal cells, besides 

 these indications of multiplication, exhibit yet another evidence 

 of the possession of life in the amoeboid movements that I first 

 discovered in them,* and have since ascertained to be present 

 in almost all animals. 



In the common Frog, and the edible garden Snail (Helix po- 

 matia), I have even observed non-nucleated masses, probably un- 

 developed remains of protoplasm, undergoing very lively changes 

 of form; and similar observations have been made by Grohef 

 and by Strieker, J in another domain of investigation, namely, 

 in the milk during the puerperal state. The vasa efferentia are 

 lined by a simple columnar epithelium with short cilia, whilst 

 in the canal of the epididymis the cells are much elongated, 



Fig. 174. 



Fig. 174. a, Cell, and 6, nucleus from the testis of the common 

 Frog. 



have oval nuclei, and a brush of long cilia. Beneath these is a 

 second layer of small round cells with circular nuclei. O. 



Fig. 175. 



Fig. 175. Amoeboid corpuscles from the testes of the common Frog 

 (Rana temporaria). 



Becker also found ciliated cells in the Hydatids of Morgagni, 

 and I am able to corroborate his statement. 



VARIOUS FORMS OF THE SEMINAL ANIMALCULES. Besides 

 the above-mentioned cellular elements, which line or fill the 

 interior of the tubuli seminiferi, we meet, in sexually mature 



* Ueber eine neue Art amoboider Zellen (" On a new kind of Amosboid 

 Cell "). Schultze's Archiv, Band i., p. 68. 

 f Virchow's Archiv, Band xxxii. p. 416. 

 Wiener Sitzungsberichte, 1866, p. 184. 



