264 
A Parasitic Copepocl 
many species of Lernaeopoda; failing access to Bichiardi’s types my 
specimens must be regarded as belonging to a new species for which 
I propose the name Lernaeopoda scyllicola. 
Of other authors (beside Brian) who have found the alleged L. galei 
upon Scyllium, and, as far as I can discover, any Copepod parasite 
upon Scyllium (all spp.) we have only van Beneden (1851, upon Scyllium 
canicula ). 
The parasite was particularly abundant on Scyllium canicula taken 
Locality 
Porteferraio 
Porteferraio 
Plymouth 
Coasts of Devon 
and Cornwall 
Body. The outline of the animal is best seen from Fig. 2. The 
total length of an average preserved specimen is about 21 mm. which 
is made up as follows: 2nd Maxillae 7 mm.; Trunk 7 mm. (of which 
2 mm. is occupied by the CepJialothorax ); Ovisacs from 5 mm. (usually) 
to 7 mm.; the Abdominal appendages 3 mm., their length being coincident 
with the ovisacs 1 . 
The animals are greyish-white or yellowish-white in colour. The 
yellow bands mentioned by van Beneden appear to be the muscles, 
which are very beautiful representatives of the striped variety showing 
through the chitinous envelope. 
The CepJialothorax is comparatively small, inclined to the trunk 
axis, oval in outline, strongly flattened dorsi-ventrally, and covered 
with a distinct dorsal carapace. 
The Trunk is slender, and a narrow neck is shown where it joins 
the cephalothorax. The first one or two segments of the thorax alone 
are differentiated, the rest are indistinguishably fused with one another 
and with the abdomen. The trunk is broadest and thickest at the 
1 The dimensions of L. galei, according to Wilson, are: total length 10-15 mm.; 
Cephalothorax 1-5 mm.; Trunk 9 mm. (posterior processes 2 mm.); ovisacs 10 mm. 
at Plymouth in 1914—15. 
Author 
Host 
Name of Parasite 
Kroyer 
Squalus gctleus (Linn.) 
Lernaeopoda gale\ 
Squalus acanthias 
L. galei 
van Benerlen 
Mustelus vulgaris 
Scyllium canicula. 
99 
Trygon paslinaca 
99 
Riehiardi 
Scyllium stellare 
L. scyllii 
Mustelus equestris 
L. galei 
Brian 
S. stellare 
S. canicula 
99 
Leigli-Sharpe 
S. canicula 
L. scyllicola 
