168 DR. T. S. COBBOLD ON ENTOZOA. 
Another still more interesting entozoon, and one which was only discovered after a very 
careful dissection, is a small fluke, from the gall-ducts of the liver. This minute trema- 
tode is furnished with intestinal cæca of a zigzag form, and it is of especial interest as 
establishing the clear-sightedness of those Entozoologists who have insisted upon a generic 
distinction between the organization of the common fluke (Fasciola) and of the Distomata . 
properly so called; we have here, in short, an intermediate condition between the complex 
alimentary cæca of the one genus and the simple bifariously divided tube of the other. For 
the generic and specific recognition of this species I offer the following nomenelature and 
characters :— Campula oblonga. Length $thto$thofaninch; breadth th; oral and ven- 
tral suckers conspicuous ; reproductive pores immediately in front of the latter ; integument 
everywhere clothed with minute spines; vitelline organs largely developed; gastric cæca 
of a zigzag form, somewhat irregular (figs. 84, 85). This entozoon occupies the peripheral 
- branches of the hepatic cæca, which are very much. enlarged and thickened at the infested 
points, sometimes enclosing from fifteen to twenty individuals at one spot. In the stomach 
of the Porpoise there were also specimens of the crustacean Lerneonema and a Filaria, 
evidently belonging however to the partially digested fish-remains within that viscus. 
To facilitate reference, the following is a list of the worms noticed in this paper :— 
LarvarL ENTozoa. 
Coenurus cerebralis. 
Cysticercus cucumerinus. 
—— Giraffe. 
—— fasciolaris. 
pisiformis. 
Scolex polymorphus. 
tetrarhynchus. 
NEMATOIDEA. 
Filaria attenuata, R. 
piscium, R. 
——— rubella ?, R. 
Trichosomum falconum, R. 
longicolle, R. 
Spiroptera leptoptera, R. 
Prosthecosacter convolutus, Dies. 
inflexus, Dies. 
Oxyuris ambigua, R. 
ornata, Dyj. 
Ascaris acanthocaudata, 7. S. C. 
acuminata, Schrank. 
aucta, R. 
clavata, R. 
collaris, R. 
— depressa, R. 
leptoptera, R. 
——— marginata, R. 
— mystax, R. 
——— nigrovenosa, R. 
Ascaris rigida, R. 
spiculigera, R. 
vesicularis, Fröl. 
Dachnitis globosa, Dy. 
sphærocephala, Duj. 
Dochmius tubæformis, Du. 
ACANTHOCEPHALA. 
Echinorhynchus acus, R. 
anthuris, Duj. 
; tereticollis, R. 
Pentastoma proboscideum, Brem. 
CESTOIDEA. 
Bothriocephalus coronatus, R. 
punctatus, R. 
—— rugosus, À. 
Ligula reptans?, Dies. 
Gymnorhynchus reptans, R. 3 
Diphyllobothrium stemmacephalum, T. S. C. . 
Tetrabothrium cylindraceum, R. 
macrocephalum, R. 
Schistocephalus dimorphus ?, Crep. 
Tænia crassicollis, R. 
elliptica, BatscA. 
—— filicollis, R. 
serrata, Goeze. 
sphærophora, R, 
variabilis, R. 
