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THE AMERICAN NATURALIST [Vol. XLIII 



immediately beneath the cuticula, it has dropped back of 

 some or all of the superficial muscle layers into the paren- 

 chyma, its constituent cells have become more or less 

 separated from one another, and it forms the broken or 

 irregular tissue called the subcuticula. 



Fig. 1, which is taken from Blochmann's paper and ap- 



pears also in Claus and Grobben's "Lehrbuch, ,, Braun's 

 " Menschliche Parasiten" and Lankester's "Zoology," 

 represents a section of the body-wall of a cestode (Ligula) 

 and shows the relation of the cuticula to the subcuticular 



