150 



THE FUR SEALS OF THE PRHULOF ISLANDS. 



the border between the lirst aud secoud thirds of the body, 42""" from the anterior 

 extremity iu a specimen 124"'"' long, 45"'"^ in one 135"'"' long, and 40'""' in one 110""" 

 long. Baird states that of his specimens "the vagina is situated at about two-thirds 

 of its length from the anterior extremity." The position of the vulva is the great 

 Ijoint of difference between the descriptions of the worms studied by Baird and 



Fig. 71. 



i-i-j 



^- 



Fig. 73. 



Parona. Whether Baird accidentally measured from the tail instead of the liead, we 

 do not care to state; such an error would be possible, but hardly probable. That such 

 a variation in the position of the vulva would occur, seems improbable. The vaginal 

 canal measured 0,5'""' in length, the double uteri 29'"'". 



Baird described the cuticle of the female as transversely striated the entire length 

 of the body, while the striae of the male extended only to within half an inch of the 



