W. H. Leigh-Sharpe 
293 
B. Skin on the back with six longitudinal series of small warts. Eyes none. 
Xchthyobdella. 
I. elegans. 
C. Skin smooth. 
(a) Eyes 6. 
Abranchus*. 
(a) Anterior sucker well developed almost as large as the 
posterior sucker. Body brown, not transparent. 
A. brunneus. 
(b) Anterior sucker very small, formed merely from the edge 
of the mouth cavity. Body considerably transparent. 
(1) Body unpigmented, slightly yellow owing to the 
gland cells showing through. 
A. microstomus. 
(2) Body with numerous dorsal transverse black 
bands interrupted in the middle line. 
A. sexoculatus. 
(/3) Eyes 4. 1 IP. quadrioculata. 
(y) Eyes none. Posterior sucker r Platybdella* - 
twice the size of the anterior.) ( P. anarrhichae*. 
(S) Eyes none. Body pointed at both ends. Anterior sucker and 
posterior sucker of about equal size, small, and not as broad as 
the body at its broadest part. ( ? One pair of vesicles.) 
Hemibdella*. 
H. soleae. 
A KEY TO HOSTS. 
On Anarrhichas lupus ... 
,, Elasmobranchs, principally species of Raid 
,, Elasmobranchs, usually Torpedo ... 
,, Lophiuspiscatorius ... ... ... 
„ Solea vulgaris . 
,, Cottus scorpius 
Platybdella anarrhichae 
Pontobdella muricata 
Branchellion torpedinis 
Calliobdella lophii 
Hemibdella soleae 
inter alia Abranchus brun¬ 
neus and A. microstomus 
Parasitology vni 
19 
