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THE AMERICAN NATURALIST [Vol. XL VIII 



from India. There are to be considered in connection 

 with this extraordinary record, first, the possibility of an 

 exchange of labels in the course of the several handlings 

 of the Mallophagan specimens, and, second, the possibility 

 of a favorable answer to the question: Is Lutra pruneri, 

 which does not appear in Trouessart at all, only Lutra 

 lutra, the common Old World otter, and was the speci- 

 men from which the Mallophagan came a resident in a 

 zoological garden in which kangaroos or wallabies also 

 lived, affording a bare chance of straggling? The similar 

 aberrant records from dogs of the kangaroo parasite 

 Heterodoxus have already been referred to. 



The bears (family TTrsidae) have, so far, but one para- 

 site record to present, a Mallophagan species, Tricho- 

 dectes pinguis, having been described from the Thibetan 

 bear, JJrsus thibetanus, a century ago. 



The walrus (family Trichechidae) harbors a strange 

 Anopluran parasite of species, genus and family peculiar 

 to its host, as, indeed, might be expected of any ecto- 

 parasite daring enough to brave comrade life with wal- 

 ruses. Examples of the parasite have been taken from 

 walruses from Spitzbergen, Frobisher Bay (Davis 

 Straits), the Hamburg Zoological Garden, and I have 

 recently had them from a "Pacific walrus" from "south- 

 east of Siberia." 



The family Phocidae is represented in the host-list by 

 at least five species of seals and sea-lions carrying an 

 equal number of Anopluran species representing three 

 different genera, all of them peculiar to the seals. A 

 single parasite species, Echinopthirius phocce has been 

 repeatedly taken from the fur seal, Proca vitulina, from 

 both Old World and New World shores. The harp seal 

 of the Arctic is credited with the same parasite, as well 

 as another. Hooker's seal of New Zealand and the Auck- 

 land Islands carries an Anopluran, .AntarctopthiriH* 

 inacrorhir, of species and genus peculiar to it, while the 

 elephant seal of the south Pacific has another parasite 

 also of genus and species peculiar to it. 



The large order Eodentia is well represented in the 



