256 
THE GENUS LEENAEOPODA . 
INCLUDING A DESCRIPTION OF L. MUSTELICOLA N.SP., REMARKS 
ON L. GALE I AND FURTHER OBSERVATIONS ON L. SCYLLICOLA. 
By W. HAROLD LEIGH-SHARPE, B.Sc. (Lond.) 
(With 7 Text-figures.) 
The four commonest species of Lernaeopoda likely to be met with in British 
waters are: 
L. SCYLLICOLA Leigh-Sharpe 1915 Parasitology viii, 262 1 2 and xi, IS 1 . 
L. GALE I Kr0yer 1837 
L. GLOBOSA Leigh-Sharpe 1918 Parasitology xi, 29 h 
L. MUSTELICOLA N.sp. 1919 ( desuper ). 
L. MUSTELICOLA 2 N.SP. 
Habitat and Record. Two specimens, $, were taken on Mustelus 
vulgaris A, the smooth hound, captured at Plymouth in August 1918. They 
were attached in the angle between the host’s body and the pelvic fin and 
slightly to the left. [This location is unfortunate since the length of the 
attaching “arms” (2nd maxillae) I have endeavoured elsewhere to show, 
is a variable character not to be depended upon for the determination of 
species; for it is my experience that Ljernaeopoda spp. have arms very short 
in this location.] 
Body. The general form is best understood by reference to Fig. 1 d. 
Dimensions. Length of: cephalothorax 2 mm.; trunk over 4 mm.; 
ovisacs 4 mm.; abdominal appendages 1 mm.; second maxillae 2-5 mm. (but 
may depend upon location). 
Cephalothorax. Differs but slightly from that of other species in respect 
to form, but shows black pigmentation anteriorly and round the edges, no 
such pigmentation occurring in other species hitherto described. 
Trunk. Slender, even narrower anteriorly than in L. scyllicola , without 
postero-dorsal protrusion, not compressed postero-laterally. 
1 See these papers for references herein quoted. 
2 Not to be confused with L. musteli Thomson (1889) occurring on Mustelus antarcticus in 
the vicinity of New Zealand. 
