CAEN1VORA 313 



1858. Stirling, " On the Changes produced in the Lungs by 

 the Embryos of Olulanus tricuspis," ' Quart. Journ. Micr. Sci./ 

 1877, p. 145. Van Beneden, " On the Transmigration of the 

 Entozoa " (in answer to MM. Pouchet and Verrier), from the 

 French/ by Busk, in ' Quart. Journ. Micr. Sci./ 1862. Idem, 

 " Researches on the Intestinal Worms/' from Van der Hoeven's 

 abstr. in the f Nederlandsch Tijdschrift voor Geneeskunde/ in 

 ' Ann. Nat. Hist./ vol. iii, 3rd ser., 1859. Idem, "New Obs. 

 on the Development of the Intestinal Worms," from ' Compt. 

 Bend./ in ' Ann. Nat. Hist./ vol. xiii, 2nd ser., 1854. Idem, 

 " On Filaroides mustelarum," ' Mem. sur les vers intest./ J858, 

 p. 267. Welch, "On Filaria immitis," ' Lancet/ March 8, 1873 ; 

 also in ' Month. Micr. Journ./ Oct., 1873, p. 157 (with three 

 plates). Wilson, W., " A Parasitic Worm infesting the Air 

 Sinuses of the Weasel," ' Midland Naturalist/ May, 1878. 

 Wright, " On Worms found in the Pulmonary Artery of a Dog," 

 ' Lancet/ 1845, and in ' Veterinarian/ vol. xviii, p. 52, 1845. 

 Youatt, " On Tumours (containing Entozoa) in the Stomach of a 

 young Tiger," 'Veterinarian/ vol. x, p. 619, 1837; see also 

 Owen on f Gnathostoina/ Idem, " Worms (Ascaris marginata) 

 in the Nose of a Dog," ' Veterinarian/ vol. v, p. 337, 1832. 



PART V (PINNIPBDIA). 



Following the order of classification adopted in my descrip- 

 tion of the Mammalia in the ' Museum of Natural History/ I 

 proceed to speak of the internal parasites of the seals (Phocidce) 

 and walruses (Trichecida). From their piscivorous habits one 

 would naturally expect the seals to be largely infested with 

 entozoa, and yet, though sufficiently victimised, they are not 

 liable to entertain so great a variety of helminths as the fishes 

 themselves on which they feed. 



The flukes observed in Phoca vitulina are Distoma acanthoides 

 and Amphistoma truncatum, the latter occurring also in P. 

 groe.nlandica. In another seal (P. barb at a) we have D. tenuicolJe. 

 The nematodes are more numerous. The best-known is the 

 maw-worm (Ascaris osculata), which seems to be always present 

 in full-grown seals of every kind. In the years 1862-64 I 

 conducted a series of experiments with the eggs of this worm. 

 I reared embryos both in salt and fresh water, but the adminis- 

 tration of the young worms to various animals led to no result. 



