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 Uver. This minute trema- 

 tode is furnished with intestinal casca 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 caeca of the one genus and the simple brfariously divided tube of the other. For 

 the generic and specific recognition of this species I offer the following nomenclature and 

 characters : — Ccvmptda oblonga. Length ^th to ^th of an inch ; breadth T^tt ; oi"al and ven- 

 tral suckers conspicuous ; reproductive pores immediately in front of the latter ; integument 

 everywhere clothed with minute spines ; vitelline organs largely developed ; gastric caeca 

 of a zigzag form, somewhat irregular (figs. 84, 85). This entozoon occupies the peripheral 

 branches of the hepatic cseca, 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, 

 e\-idently belonging however to the partially digested fish-remains witliin that viscus. 



To facilitate reference, the following is a list of the worms noticed in this paper : — 



Larval Entozoa. 



CcEnurus cerebralis. 

 Cysticercus cucumerinua. 



GirafFse. 



fasciolarisi 



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. 



omata, Diij. 



Ascaris acanthocaudata, T. 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, Frol. 



Dachnitis globosa, DuJ. 



sphaerocephala, Duj. 



Dochmius tubseformis, Duj. 



Acanthocbphala. 



Echinorhynchus acus, R. 



anthuris, Duj. 



tereticoUis, R. 



Pentastoma proboscideum, Brem. 



Cestoidea. 



Bothriocephalus coronatus, R. 



punctatus, R. 



rugosus, R. 



Ligula reptans ?, Dies. 

 Gymnorhynchus reptans, R. 

 Diphyllobothrium stemmacephalum, T. S. C. 

 Tetrabothrium cylindraceum, R. 



macrocephalum, R. 



Schistocephalus dimorphus?, Crep. 

 Taenia crassicollis, R. 



elliptica, Batsch. 



filicoUis, R. 



serrata, Goeze. 



sphaerophora, R. 



variabilis, R. 



