EXPLANATION OF THE PLATES. 



Tab. I., f. 1. Ascaris similis, £ and $ . 



1 a. Male, nat. size; 1 b. head of do. magnified; 1 c. female. 



nat. size ; 1 d. head of do. magnified ; 1 e. tail of do. do. 

 „ f. 2. Ascaris bifaria, nat. size ; 2 a, head of do. magnified 

 „ f. 3. Mermis spiralis, nat. size ; 3 a. portion of body. 



magnified. 

 „ f. 4. Gordius platyura, nat. size ; 4 a. head ; 4 b. portion 



of body ; 4 c. tail, all magnified. 

 „ f. 5. Gordius verrucosus, nat. size ; 5 a. portion of body, 



magnified. 

 Tab. II., f. 1. Pentastoma megacephalum, female, nat. size, 1 a 



head of male? magnified. 

 „ f. 2. Distoma microcephalum, nat. size ; 2 a. head, mag- 

 nified. 

 „ f. 3. Tetrarhynchus rugosus, nat. size ; 3 a. head, magnified 

 „ f. 4. Tetrarhynchus strangulatus, nat. size; 4 a. head. 



magnified. 

 „ f. 5. Taenia Bremseri, nat. size ; 5 a. head, magnified. 



