EXPLANATION OF PLATES. 3G3 



Tab. XXXII. 



Caligus dia/phanus. 

 3. C. rapax, male and female. 

 5. C. Midleri, male and female. 

 7. C. centrodonti, male and female. 

 9. Lepeoptlieirus Stromii, male and female. 

 L. pectoralis, female. 

 L. obscunisJ^' 

 L. liippoglo8si, female. 



Tab. XXXIII. 



LepeoptJieirus Nordmannii. 

 .2. L. Tliompsoni. 

 3, 4. Trebius caiidatiis, male and female. 



5. CJialmus scombri. 



a. View of do., adhering to Caligus Mullen, h. Rostrum. 



6, 7. Dinemoiira alata, male and female. 



8. D. lamnce, female. 



9. Anthosoma SniitJiii. 



10. Pandarus bicolor, female. 



11. Nicothoe astaci. 



Tab. XXXIV. 



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

 3, 4. Lmnargus 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. //-. 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 oiLcpeopt heir us Nordmannii. b. Mouth 

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

 fork of i. Inpimjlossi. E. Foui'thpair of feet of Trebius 

 caudatus. 



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



