458 WILLIAM NICOLL. 
ventral sucker is distinctly larger than the oral sucker, the 
genital aperture is immediately in front of the ventral sucker, 
testes lobed, and ova measure about ‘10 by *05—06 mm. 
The specimens which Linton found on August 10th, 17th and 
30th (pp. 395-394, figs. 198-199) appear to represent a fairly 
distinct species, the characters of which may be summed up 
as follows: Length 3 mm.; breadth 1°25 mm. Oral sucker 
‘4 mm. in diameter; ventral sucker *5 mm. Cuticle covered 
with scale-like spines on dorsal surface and anterior ventral 
surface. Pharynx ‘12 mm. Pre-pharynx and cesophagus 
each about same length as pharynx. Genital aperture median, 
immediately in front of ventral sucker. Cirrus-pouch extend- 
ing back to anterior border of first testis. Testes median, 
tandem, slightly lobed, situated near the middle of the post- 
acetabular region. Ovary sub-globular not far behind 
ventral sucker, separated from testes by the end of the cirrus- 
pouch, median or slightly to right side. Yolk-glands lateral 
to outer side of intestinal diverticula, filling space behind 
testes, not extending in front of ventral sucker. Ova not 
numerous, measuring ‘10-12 by 05-06 mm. To this species 
the provisional name (Lepocreadium) serospinosum sp. 
inquir (= Distomum globiporum Rud. Linton, 1904, e. p.) 
may be given. 
Sub-family FELLopistomina, n. sub-fam, 
Genus Fellodistomum (Stafford 1904). 
Fellodistomum fellis (Olsson, 1868). Pl. 9, figs. 13, 14. 
Distoma fellis Olsson, ‘ Entozoa, iakt. Skand. hafsfisk.,” 
in ‘ Lunds Univ. Arssk.,’ iv (8), pp. 44-46, pl. v., fig. 94, 
A, B. 
Distomum fellis Olsson, Stossich, ‘ I. Distomi dei Pesci,” 
in ‘Progr. d. Ginnasio comm. super. T'rieste.,’ 1886, p. 
24, 
Distomum fellis Olsson, Jacoby, ‘ Beitr. z. Kenntnis. einig. 
Distomen,” in ‘ Arch. f. Naturg., Ixvi (1) (1900), pp. 
12-16, pl. ui, figs. 8-12. 
