(Figs. 47, 48). Capsalidae have from one to three pairs of middle hooks 

 andfourteen edge hooks. Likewise, among Monocotylidae the disc is di- 

 vided into parts by septa in a number of genera. Among Capsalidae and 

 closely related genera there are seven septa (Fig. 1) and in the genus Tro- 

 chopus there are ten (Fig. 28). The septa are located in the same fashion 

 as Monocotylidae forming a central alveolus and peripheral alveoli (corre- p. 36 

 sponding to the number of septa -- 7 or 10). The trimming of the disc is the 

 same as in Monocotylidae and also in Capsalidae. 



OlHH 



Fig. 43. Isancistrum loliginis Beau- 

 champ, adult worm. The smaller 

 number of hooks on the right side of 

 the disc is obviously erroneous. En- 

 larged 650 times. (According to 

 Beauchamp, 1912). 



Fig. 44. Acolpenteron nephri- 

 ticum Gwosdew, adult worm from 

 the gills of Nemachilus stolizkai 

 (Steind. ) from the neighborhood 

 of Alma-ata (Kazak, U.S.S.R. ) 



As stated before, the family Acanthocotylidae possesses a 

 powerfully developed suction-type disc which is provided with numerous 

 chitinous spines articulated with each other and located in radial rows. 

 The number of these rows fluctuates between 20 and 47. Among the genus 

 Lophocotyle there are correspondingly located muscular rays instead of 

 radial rows of spines. Among Enoplocotyle the secondary disc is absent 

 (see page385 ). 



29 



