14G Mr. H. A. Baylis oti 



co|Milatory ornjan, wliile in the 'Terra Nova' case, and 

 ])robably in that now recorded, tliey were iiiliabitiiio- the 

 renal tubules. In the * Terra Nova' whale some specimens 

 are also said to have occurred in the stomach (wall ?). 



Mr. Hamilton has oiven * some interestini>- details as to the 

 disposition of the worms in the kidneys ofc" JJ. pln/sdJux, which 

 I tnke the liberty ot quoting : — "The worms are found |)artly 

 in the m-inary tube system, partly in the interlobular tissne. 

 The point at which the worm passes into the urinary system 

 is usually, if not always, situated in the wall of a calyx. The 

 extralobular part of the parasite is embedded in a mass of 

 connective tissue, in which it has a very tortuous course. It 

 is i)robable that the presence of the nematode is responsible 

 for the growth of the tissue in the regions where it occurs, 

 since the connective tissue masses may betaken as indicative 

 of the presence of the parasites which they invariably 

 contain.'' 



Assuming that the worms observed in all cases were 

 C. crassi'cauila, we are now in a position to enumerate three 

 genera and five s))ecies of whales as tolerably well authenti- 

 cated hosts for this species, viz. : — 



1. BaIcenopt€raphi/salu.<t,lj. (= B. niusculus, Ruclt.). (Com- 



mon rorqual or tinner.) 



2. B. 7niiscuhiSj L. (Blue whale or Sibbald's rorqual.) 



li. B. borea/is, Lesson. (Northern rorqual, Rudolphi's 

 Mhale, or kSejhval.) 



4. Megaptera nodosa^ Bonn. ( = .!/. hoops = M. lonrjimana). 



(Humpback.) 



5. Ziphius cavirostris. (Cuvier's whale.) 



It is a point of some importance that the last-mentioned 

 species is a toothed whale, all the others being baleen whales. 

 It would be premature at present to speculate on the probable 

 intermediate host (if any) of the worm ; but in considering 

 this question the fact that the parasite occurs in both groups 

 <»f whales would have considerable weight, since the nature of 

 tlieir food differs widely. 



I am unable to find any definite reference to the possible 

 occurrence of this worm in a toothed whale, previously to the 

 ]jresent case. I am, however, again indebted to Dr. Harmer 

 for bringing to my notice the following interesting passage 

 from the wi itings of P. J. Van Beneden f concerning the 

 ])arasile3 o^ Ziphius cavirostris : — 



''On ne cotniuit jusqu'a present qu'un Cestode et un ver 



* Loc. cit. 



t " Jlistoire Naturelle des BaUnopl'eres,'' Memoires Courouutl?:, Ac. 

 Tioy. de Belgique, xli. (1888) p. 03. 



