funnel with clearly expressed transversal septa. The pharynx is rounded, 

 about 0. 04 mm in size and leads into a well-developed, sac -shaped 

 intestine. The armature of the attaching disc has already changed (Fig. 

 251). There are 2 pairs of middle hooks, 4 pairs of edge hooks, and 

 attaching clamps are formed instead of the 5th pair. The remaining edge 

 hooks lie in such a fashion that the developing clamps locate between the 

 3 upper pairs and the complex of the middle hooks and the 2 re- 

 maining edge hooks. The sizes of the edge hooks of this stage are 0.017 - 

 0. 019 mm, of the 1st pair of middle hooks --0. 05 mm, of the second- - 

 0. 052 mm, and the attaching clamps 0. 06 x 0. 035 mm. Subsequent 

 development takes place rather quickly. Just as among the Mazocraes 

 and other close forms .subsequent pairs begin to be incepted at the place 

 and from the edge hooks which lie in front of the 1st pair of the attaching 

 clamps until the stage of the 4 pairs of clamps has been reached and 

 then the following pairs are incepted completely anew until 33 - 35 pairs, 

 which are characteristic for the adult individuals, are reached. The in- 

 ception of each pair takes place mainly simultaneously, although one often 

 observed faster deyelopment of clamps on one side. Thus, one often 



Fig. 252, Microcotyle gotoi 

 Yamaguti, young worm with 6 

 clamps on one side of the disc 

 and 7 on the other from the gills 

 of Hexagrammos octogrammus 

 (Pal. ) from the region of 

 Yablichnoii (southern Sakhalin, 

 Sea of Japan). 



Fig. 253. Microcotyle gotoi 

 Yamaguti, young worm with 5 

 clamps of which the left fifth clamp 

 is more weakly developed than the 

 right one from the gills of Hexa- 

 grammus octogrammus (Pal, ) from 

 the region of Yablichnoii (southern 

 Skahalin, Sea of Japan). 



p. 212 



observes individuals with 5-6 clamps on one side and 6-7 on the other 

 (Fig. 252). 



Along with this one must ncte that the clamps are incepted 

 considerably smaller than among adult animals; this has already been 

 indicated earlier (see page 196 ). However, one can often observe that 

 on one side, the last of the clamps which was formed is still of small 



231 



