sides of the body. The first zone begins somewhat away from the anterior 

 end of the body and reaches the level of the anterior end of the pigmented 

 eye. The second zone extends from the posterior end of the eye to the 

 attaching disc, and the third lies on the posterior edge of the disc (judging 

 by the drawing of Remley--on a cone-shaped growth). The author did not 



p. 205 





(i-'J 



D.U 



Fig. 238. Microcotyle spinicirrus 

 MacCallunn, young worm with six 

 pairs of clamps and the "cercomere" 

 (according to Remley, 1942). 



0B5Hf 



Fig. 237. Microcotyle spinicirrus 

 MacCallunn, attaching armature of 

 the posterior end of the disc of the 

 young worm (before the loss of the 

 cercomere). A--Cercomere; 

 B,C--large middle hooks; D--edge 

 hooks. (According to Remley, 1942). 



observe the suckers of the buccal 

 cavity in the larvae. There is a 

 slightly elongated pharynx located 

 on the border between the anterior 

 and posterior halves of the body. 

 It opens posteriorly into the sac- 

 like, rounded intestine. A pig- 

 mented little eye of almost 

 rectangular form (0. 018 x 0. 01 

 mm) lies between the pharynx 

 and the anterior end of the body. 

 The excretory system has not 

 been studied; there are 3 pairs of 

 flame cells (?--B.B.) one of 



which is located in front and to the side of the eye with the second along 

 the sides of the anterior end of the pharynx, whereas the third is on the 

 sides of the body behind the intestine. The attaching disc occupies the 

 posterior one -third of the entire body. It is equipped with 12 edge hooks 

 along the edges and 2 pairs of large hooks in the middle of the disc (Fig. 

 237). The edge hooks are of the same form as among Mazocraes, about 



Fig. 239. Microcotyle spinicirrus 

 MacCallum, young worm with 13 

 pairs of clamps and with a "cerco- 

 mere.", (According to Remley, 

 1942). 



223 



