134 ^''' Bochannan'j Account of the Onchidium, 



and fexual organs are placed in a perforation {cloaca communis) in the 

 tinder part of the tail, immediately behind the foot: but during co- 

 ition the diftindlion of fexes is very evident, the penis protruding to 

 a great length, confidering the fize of the animal. I have as yet 

 learned nothing with legard to the geftation of the female, or how 

 {he produces her young. 



EXPLANATION of the FIGURES. 



Tab. V. Jig. I. The under fide of Onchidium Typhce, 

 1. The upper part. 

 3. The fide view of the head. 



XIII. Re^ 



