330 HISTORY OF BRITISH CRUSTACEA. 



Pound on the gills of the salmon. 



In salt-water, according to Miiller and Dr. Knox, the 

 salmon is subject to the attacks of Caligl, which adhere to 

 his integuments, and when in his migrations he runs up 

 rivers, the fresh-water destroys them; in the fresh-water again 

 he is attacked by another parasite, the Lerneopoda salmonea 

 (Baird, Brit. Ent. t. 35, f. 6), which fastens on his gills, 

 and when the salmon gets into the sea again, these vital 

 organs are cleared from the parasite."* 



Fam. ANCHORELLAB^ Baird. 



Arm -shaped appendages very short, and united from the 

 base, so as to resemble a single organ. 



Gen. 185. ANCHOKELLA, Cm. 



Head of female small, at the end of a long neck, generally 

 curved backwards ; two pairs of developed foot-jaws, and a 

 third rudimentary. Ovaries of moderate length. Male 

 very small. 



Anchorella uncinata, Miiller, sp. — Body milk-white, 

 oblong ; the arms short, ending in a rounded knob. The 



* Trans. Roy. Soc. Edin. xii. 471. 



