912. TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
as a free swimmer, and is often found parasitic upon the 
cod and other fishes. 
Caligus curtus, Leach. (Pl. XXVII, fig. 3.) 
Length 5.0 mm. Less common than the preceding 
species, but found under similar conditionssand attached 
to the cod and plaice. The conspicuous lunules or sucking 
discs situated on the lower surface of the frontal plates 
and having the appearance of eyes distinguish the genus 
Caligus from the rest of the family Caligide. 
Lepeoptherus stron, Baird. (Pl. XX VII, fig. 6. 0.) 
Length 2.50 mm. 
Lepeoptheirus nordmannu,M. Edw. (Pl. XX VIL, fig. 5. a.) 
Length 4.50 mm. 
Lepeoptheirus hippoglossi, Kroyer. (Pl. XX VIL, fig 6. a.) 
Length 4.50 mm. | 
Lepeopthetrus obscurus, Baird. (Pl. XX VII, fig. 5. 0.) 
Length 2.60 mm. All the specimens I have received 
of the above four species of the genus Lepeoptheirus were 
sent to me from Bull Bay by the late Mr. Frank Archer 
who had obtained them from the local fishermen. 
Family LERNZIDZ. 
Lernea branchialis, Linn. (Pl. XXVI, fig. 7.) 
Two very minute Crustacea (fig. 1) were taken in the 
tow-net off Puffin Island, which appeared to be larval 
forms of a Lernea. Since then two more high}; developed 
specimens (one from the same locality) have heen found, 
apparently belonging to the same species as the larval 
specimens. ‘They agree in the main with Ivernea bran- 
chialis, Linn., described and figured by Claus in his 
‘“‘Beobachtungen ueber Lerneocera, Penict Jusund Lernea, 
1868,” corresponding in most particulars with the male 
and female described by Claus, and I bave provisionally 
included them under this species. Cty specimens differ 
te 
