115 Part [11 — Twenty-third Annual Report 
in outline. Only one or two specimens of this form have yet been 
observed, and as it resembles Chondracanthus depressus in some respects 
I record it for the present as es oblongus of that species (see figs. 
14-17, pl. vi.). 
Fam. LERNXOPODIDA. 
Genus Brachiella, Cuvier (1817). 
Brachiella trigle, Claus 
1901. Brachiella trigle, T. Scott, 19th F.B. Rept., Pt. IIL, 
p. 133, pl. vil., figs. 24-29. 
Habitat.—-Obtained on the gills cf a Streaked Gurnard, 7'rigla lineata, 
captured at Station VIII., Firth of Forth, in September, 1897, but only 
now recorded. The Forth is a new station for this species. 
PART ‘ii: 
ON SOME SPECIES OF TREMATODA NOT PREVIOUSLY RECORDED. 
The ecto-parasitic vermes of fishes are not uncommon, but as many of 
them, and especially of the Trematoda, are of small size and more or less 
flattened, and as their colour approximates closely to that of the fishes on 
which they live, they are readily missed when the fishes are being 
examined. 
There is evidently a considerable variety of forms among these ‘Tre- 
matodes. That some of them are elegant in outline as well as in structure 
is shown by the beautiful drawings in MM. van Beneden and Hesse’s 
work, Recherches sur les Trématodes Marins. 
In the following notes I record a few curious forms exhibiting some 
peculiarities of structure which differ somewhat from those described in 
previous papers on these organisms, published in Part IIT. of the Annual 
Reports of the Fishery Board for Scotland for 1895, 1901, 1902, and 
1904. I also give at the end of the present paper a list of all the species 
recorded in these various Reports. 
TREMATODA. 
Fam. PoLyYSTOMATIDA. 
Genus Phyllocotyle, van Benden and Hesse (1863). 
Phyllocotyle gurnardi, van Beneden and Hesse. PI. vi., figs. 19 and 20. 
1863 Phyllocotyle gurnardi, v. Ben. and Hesse, Rech. sur les 
Trém., p. 103, pl. x., fig. 1-7 (not Phyllocotyle gurnardt, T. 
Scott in Part III. of “the 19th Report, p. 147, pl. viii, 
fig. 23). 
Under this name I record a species of Trematode found on the gills of 
specimens of the Grey Gurnard (Trigla gurnardus, Lin.) from the Moray 
Firth. 
The body of this Trematode is lanceolate, very flat, and moderately 
slender at the anterior end, but becomes wider posteriorly ; the distal end 
is rounded, and furnished on the ventral aspect with six marginal 
suckers of moderate size and of a rather complicated structure—three 
on each margin; an elongated process, slender and narrow, and with 
