294 



SEMINAL VERMICULl. II. 



dnclly ..obferved ; but, beginning to relax, we 

 eafily fee their mode of advancing, and that it is 

 the fame with that of the aquatic animals juft 

 mentioned. When the appendage ceafes to oicil- 

 l.ite, progrefnon alfo ftops, but begins again 

 when the ofcillations recommence. I made this 

 important obfervation, not only on the corpufcula 

 in the femiaal fluid of the horfe, but on thofe of 

 the human femen, and of all the animals I inall 

 afterwards name. The motion here did not con- 

 tinue above an hour and a half. 



The corpufcuia of the two portions already 

 fpoken of were very numerous ; in a third por- 

 tion they were rare, but perfedly fmiilar both in 

 figure and properties. Their motion continued 

 eight hours ( i ). 



I examined the femen of other fix horfes. The 

 corpufcuia, except in being more or lefs nume- 

 rous, were exactly like the preceding, therefore 

 it is needlefs to defcribe them. When the femi- 

 nal fluid is mixed with v/ater, or even v/ith fali- 

 va, all inflantly become motlonlefs. 



The feminal fluid of the bull contained moving 

 corpufcuia in numbers furpalTmg thofe in the 

 human femen (2). The appendage is longer 

 than that of the hum.an feminal corpufcuia, and 

 the body alfo feems a little larger, fig. 4. Pi. 2. 



The 



( I ) May 2, the thermorneter 64°. 

 (7.) March 30, the thermometer 57°. 



