DE. T. S. COBBOLD ON SOME EXPEEIMENTS WITH ENTOZOA. 141 



pable sand, and tliere can be no doubt that tbe beautiful state in 

 whicb most of the bones are found is mainly owing to the extreme 

 fineness of tbe sand in wbicb they were imbedded. 



Tor the acceptance of the Society I send three more photo- 

 graphs ; one showing the right side of the Dinornis as mounted ; 

 another showing the left side, together with a fuU-sized Ostrich ; 

 and another of the Cassowary, the Emu, and the Ehea. The 

 Rhea is the only bird in the group agreeing with the Dinornis in 

 the number of sternal ribs ; the Emu and Cassowary have four 

 each, and the Ostrich five ; but in the side of the Ostrich shown 

 on the photograph there are only four, — the dorsal rib, to which 

 the fifth should have been attached, terminates in a point, and has 

 no articulatory surface at the end ; the sternum is equally with- 

 out any articulatory surface to receive it ; in the other side the 

 bird has the normal number of five sternal ribs. 



Brief notice of results obtained by Experiments with Entozoa. 



By T. Spencek Cobbold, M.D., F.E.S., P.L.S. 



[Eead Dec. 1, 1864] 



1. Taenia ecliinococcus. — Eight separate worm-feedings with 

 fresh Echinococcus-larvse administered to five diff'erent dogs gave 

 only negative results. In one instance the experimental animal, 

 to which I had made three separate administrations, was unfortu- 

 nately liberated by some iU-disposed person the evening prior to 

 the day fixed for ascertaining the result. This dog had been six- 

 teen weeks under observation. 



2. Tcenia serrata. — Three administrations of full-grown larvae 

 {Gysticercus pisiforonis) to three separate dogs gave positive re- 

 sults in two instances ; the third experiment being partly nega- 

 tived. In all cases the administration of imperfectly developed 

 larvae to the same animals produced no tapeworms. The results 

 of a fourth experiment, in three separate worm-feedings, with the 

 dog which had been liberated, could not, of course, be ascertained. 



3. Tcenia marginata. — The administration of fresh eggs of this 

 tapeworm to a monkey failed to develope any examples of the 

 Cysticercus tenwicollis. 



4. Tcsnia cucumerina. — In like manner the ova of this highly 

 characteristic species administered to several cockroaches {Blatta 

 orientalis) yielded only negative results. 



5. Fasciola Jiepatica. — The deposition of the eggs of the com- 



