EXPLANATION OF PLATES. 363 



TAB. XXXII. 



Fig. 1. Caligus diaphanus. 



2, 3. C. rapax, male and female. 



4, 5. C, Mutteri, male and female. 



6, 7. C. centrodonti, male and female. 



8, 9. Lepeoptheirus Stromii, male and female. 



10. L. pectorcdis, female. 



11. L. obscurus* 



12. L. liippoglossi, female. 



TAB. XXXIII. 



Fig. 1. LepeoptJieirus Nordmannii. 



2. L. Thompsoni. 



3, 4. Trebius caudatus, male and female. 



5, Chalimus scombri. 



a. View of do., adhering to Caligus Mullen, b. Eostrum. 



6, 7. Dinemoura alata, male and female. 



8. D. lamnce, female. 



9. Anthosoma Smithii. 



10. Pandams bicolor, female. 



11. Nicotkoe astaci. 



TAB. XXXIV. 



Figs. 1,2. Cecrops Latreilleii, male and female. 

 3, 4. Lcemargus muricatus. 



5. Carapace of Caligus diaphanus ; under surface, 

 to show the different organs in situ. 



a. Lunules or sucking-discs, b. Antenna, c. First pair of foot- 

 jaws, f. Mouth, g. Organs representing the posterior pair 

 of jaws. h. Second pair of foot-jaws, i. Third pair of do. 

 j. Sternal fork. k. First pair of thoracic feet. /. Second 

 pair of do. m. Third pair of feet. n. Fourth pair of do. 



Fig. A. First pair of foot-jaws of Lepeoptheirus Nordmannii. B. Mouth 

 and posterior jaws of do. c. Sternal fork of do. D. Sternal 

 fork of L. hippoglossi. E. Fourth pair of feet of Trebius 

 caudatus. 



* This may possibly prove to be the male of L. hippoylossi. 



