DE. T. S. COBBOLD ON ENTOZOA IN THE DOG. 283 



7. Ascaris marginata, Eudolphi, 



8. Eustroiigylus gigas, Diesing. 



9. BotliriocepJialus latus, Bremser. 



10. JS. cordatus, Leuckart. 



11. B.fuscus, Krabbe. 



„ „ var. reticulatus, Krabbe. 

 „ „ var. duhius, Ki'abbe. 



12. Tcenia marginata, Batscb. 



13. T. coenurus, Kucbenmeister. 



14. T. cucwnerlna, Bloch. 



15. T. serrata. Goeze. 



16. T. litterata, Batsch. 



17. T. echinococcus, Siebold. 



18. Pentastoma tcenioides, Rudolphi., 



19. Cystlcerciis (telce) celluloses "i 



20. Filaria trispinulosa \ larval forms. 



21. F. sanguinis i 



The above list, large as it is, niigbt be very much extended if 

 one chose to regard as true species a number of particular forms 

 and varieties described by authors under other names. I could 

 show, however (if it were the express object of the present paper 

 to do so), that most, if not all, of the forms referred to are in 

 point of fact identical with those here provisionally admitted to be 

 distinct. Probably the list is somewhat too extended as it is ; yet, 

 meanwhile, I purposely refraiu from entering at any length upon 

 the exclusively zoological aspects of the question. In other words, 

 I wish it to be understood that, as regards several of the forms 

 here enumerated, I do not pledge myself to affirm that they are 

 specifically distinct. Nevertheless, taking them up serially in the 

 order given, I have a few remarks to ofier respecting each ; and 

 fortunately the end proposed will enable me to restrict my obser- 

 vations on certain forms within the narrowest possible limits. 



1. Solostoma alatum. — Flukes are sparingly found in the car- 

 nivorous mammalia generally ; therefore the Trematoda being re- 

 presented by a single species in the dog need not excite surprise. 

 Though rare in the dog, this fluke is not uncommon in its con- 

 geners, the Fox and Wolf. Under a variety of names its structure 

 and relations have been carefvdly studied ; but there is no ground 

 for supposing that its existence is either directly or indirectly 

 injurious to man. 



2. Spirojyfera sanguinolenta.—l am not aware that any one has 



