CETAOEA 



425 



Thence they will be passively transferred to the stomachs of 

 cetacea, whence they bore their way through the tissues to the 

 bronchi and pulmonary vessels. Though usually found in these 

 situations they also infest the cranial sinuses. Prosthecosacter 

 minor is frequently lodged within the cavity of the tympanum. 

 Professor Quekett and myself, working independently, found 

 examples of P. inflexus occupying the chambers of the heart. 

 Under the name of Filaria iiiflexicaudata, Prof. Yon Siebold 

 has described yet another pulmonary nematode from the porpoise. 



FIG 71. Tail of the female Prosthecosacter convolutus (magnified 60 diameters), with a 

 section of the oviduct (magnified 220 diameters), and a separate embryo (magnified 

 350 diameters). After Busk. 



It occupied cysts in the lung. Like the strongyloids above men- 

 tioned, the females are viviparous, but the males are destitute 

 of any caudal hood. In the whale (Baltenoptera) killed off the 

 isle of Eugen, and already alluded to, M. Kosenthal obtained a 

 large number of FilariaB (F. crassicauda, Creplin). To 

 Dujardin's words the worms were situated " dans leSy^o^pe 

 caverneux du penis d'une Balcena rostrata" The m^Jes- and 

 females measured respectively 6J and 13 inches in 4e 



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