334 Zoological Society : 



and the feathers appear thicker than those on these parts in the com- 

 mon bird. 



The specimen from which these remarks are taken was one of 

 three examined by me, two of which were adult, and one a young 

 bird about one-third grown. This young bird exhibited the trans- 

 verse bars on its plumage as distinctly as the adult bird ; at the same 

 time the broad longitudinal stripes were clearly to be seen. Judging 

 from the skins, I am inclined to consider this bird to be smaller than 

 the common species. As I hope before long to obtain more in- 

 formation respecting these birds, together with other and more 

 perfect specimens, I beg to propose provisionally the name of 

 Dromcem irroratus for this supposed new species. 



A RECORD OF THE NUMBER OF DAYS OF INCUBATION OF 



BIRDS WHICH BREED IN THE SOCIETY'S GARDENS. B 



PHILIP LUTLEY SCLATER, M.A., F.L.S. 



The subjoined table, furnished to me from the observations of our 

 intelligent Assistant Head Keeper, Benjamin Misselbrook, gives the 

 period of incubation of eighteen species of birds which ordinarily 

 breed in our Gardens. The time of incubation appears to be as 

 constant in each species of bird as the period of gestation in each 

 species of mammal ; and I think that every addition to our imperfect 

 knowledge of this subject must be of interest to the naturalist, and 

 worthy of record. 



Days. 



1 . Emeu * (Dromceus Novce-hollandia) 56 



2. American Rhea (Rhea americana) 35 



3. Impeyan Pheasant (Lophophorus Impeyanus) .... 28 



4. Cheer Pheasant (Catreus Wallichii) 28 



5. Purple Pheasant (Gallophasis Horsfieldii) 24 



6. White-crested Kaleege (Gallophasis albocristatus) 26 



7. Black-backed Kaleege (Gallophasis melanonotus) . 24 



8. Californian Quail (Callipepla californicd) 21 



9. Crowned Pigeon (Goura coronata) 28 



10. Crested Pigeon (Ocyphaps lophotes) 14 



11. Black-necked Swan (Cygnus nigricollis) 35 



12. Black Swan ( Cygnus atratus) 35 



13. Cereopsis Goose (Cereopsis Novce-hollandits) .... 35 



14. Sandwich-Island Goose (Bernicla sandvicensis) .. 31 



15. Ashy-headed Goose (Chlo'ephaga poliocephala) .. 30 



16. Ruddy Shieldrake (Casarca rutila) 30 



17. Summer Duck (Aix sponsa) 30 



18. Mandarin Duck (Aix aalericulata) 30 



June 28, 1859. Dr. Gray, F.R.S., V.P., in the Chair. 



DESCRIPTION OF SOME NEW RECENT ENTOMOSTRACA. BY 

 W. BAIRD, M.D., F.L.S., ETC. 



The Entomostraca now about to be described were taken from 

 some freshwater pools at Nagpur, and placed in my hands by the 



* The eggs of the Emeu and Rhea were hatched in the Society's incubator. 



