STUDIES ON THE DIGENETIC TREMATODES. 4.57 
Stoss (I, p. 160, fig. 25) is regarded by Odhner! as wrongly 
identified. The long cirrus-pouch brings this species into 
relation with Peracreadium. In other respects it also 
agrees closely with this genus.’ 
Distomum vitellosum Linton (p. 355, figs. 176-178) isa 
species which shows some affinity to the ALLocREADIIN”, but 
is distinguished by the pecular structure of the ventral 
sucker. Linton has described this species from numerous 
fish, but his descriptions are so conflicting that it is either a 
very variable species or it is a combination of two or more 
distinct species. It is undoubtedly a genus type, but its 
structure is not sufficiently well known for it to be definitely 
included amongst the ALLOCREADIIN®. 
One other species may here be mentioned, namely, Dis- 
tomum globiporum Rud. Linton (p. 354, figs. 159, 173, 
198) from Leiostomus xanthurus and other fish. This 
species 1s quite incorrectly identified. It belongs to the sub- 
family LepocreaDUN® Odhn., but to which genus it is diffi- 
cult to say. It seems, however, more nearly related to 
Lepocreadium than to Lepodora (Lepidapedon), and 
it is not identical with any of the HKuropean forms. The 
specimens which Linton obtained certainly do not all belong to 
the same species. ‘'l'hose from Fundulus majalis (p. 356, 
fig. 159) are small with equal suckers, round testes, and 
apparently without spimes, and with the genital aperture 
immediately in front of ventral sucker. ‘hose from Ortho- 
pristis chrysopterus (p. 378) are twice as large, with 
smaller ova, ventral sucker half as large again as oral 
sucker. Genital aperture immediately behind pharynx, and 
vitellaria extending forward to the middle of the neck. 
Those from Leiostomus xanthurus (pp. 393-394, figs. 173, 
gs. 
198) are a mixed lot, some with spines, others without. The 
'“ Revision der Gattung Allocreadium,” in ‘ Zool. Jahrb.,’ syst. xiv, 
p. 486. 
* In Stossich’s latest paper (see p. 61, note 2) on these species, Allo- 
creadium characis Stoss., A. mormyri, and A. umbrine are dealt 
with. A new species, A. dubium, is added. Whether he deals with’ 
Distomum fasciatum Rud. or not I am unaware. 
