CONTENTS. 



CHAPTER IV.— MISCELLANEOUS CRVBTACEAl^^.—Cojdmm'd. 

 § 7. — Nymphon gracilis, 

 § 8. — Pycnogonum littorale, — the Whale, Louse, 



§ 9. ASBLLUS VULGARIS, 



§ 10. LiMNORIA TEREBRANS, 



§ 11. — Cypris PILOSA, 



Cypris Fortuessi:?, 



CHAPTER V. 



-PARASITES, 



§ 1. — Caligus curtus, . 

 § 2. — Caligus salmonis, 

 § 3. — Caligus, 

 Lern.ea, 



Lern^ea branchialis, 



§ 4. botryllofer, 



§ 5. — Pegasillus hirsutus. 



pa(;e 

 234 

 236 

 237 

 241 

 244 

 245 



246 

 246 

 249 

 250 

 251 

 251 

 252 

 253 



CHAPTER VI.— THE HYDRACHNA, OR WATER SPIDER, 

 Conclusion, ..... 



254 

 266 



