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 Caligi , 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. - ^ 
Pam. ANCEORELLABAE, Baird. 
Arm-shaped appendages very short, and united from the 
base, so as to resemble a single organ. 
Gen. 185. ANCHOBELLA, Cuv. 
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, Muller, sp. — Body milk-white, 
oblong ; the arms short, ending in a rounded knob. The 
* Trans. Roy. Soc. Edin. xii. 471. 
