Four species of Microcotyle. 



227 



(Fig-. Ba) whicli liave a framework very much like that of the more 

 rounded suckers whicli move about lipon the end of a muscular stalk 

 oiily, The disposition of the skeleton can be seen cleaiiy in 



■S:-?--^b 



Fiff. B 





Fig. A. Microcotyle pyragra- 

 phorus. M raouth and oral suckers. 

 Pspined peuis. Uo nterine opening. 

 SP spines on bottom of genital recess. 

 OY ovary. H testicles. 



Fig. B. Microcotyle pyragra- 

 \ phorus. a tong-like clasping organ. 

 ,. . .] b unstalked sucker with chitinous 

 '■^^x) skeleton. 



Fig. A. 



the drawings; probably the tong-like structures can open quite 

 widely although no muscular fibres can be seen between the handles 

 to control their movements. The blades, however, are solidly sup- 



