Zoological Society. 213i 



Subgenus Photina, H. and A. Adams. 



Shell smooth, subconical ; spire depressed ; axis covered by a 

 smooth callus ; columella ending in a simple point. 



This section includes all the species oi Margarita that are not 

 umbilicated. 



1. Photina nigra, A. Adams. P. testa depresso-conicd, im- 

 perforatd, solidd, nigrd, Icevi ; anfractibus subrotundatis, trans- 

 versim sulcatis ; longitudinaliter obliqub substriatd; anfractu 

 ultimo subangulato ; regione umbilicali impressd; callo alba 

 obtecto. 



Hub, ? 



2. Photina fusca, A. Adams. P. testa obliqud, subconicd, ni- 

 tidd, fusco variegatd ; anfractibus parwn convexis, transversim 

 sulcatis, ultimo subangulato ; aperturd subrotundatd, intus 

 viridi iridescenti, 



Hab. ? 



3. Photina Sandwichiana, A. Adams. P. testd orbiculato- 

 conicd, imperforatd, Icevi, albidd, viridi fuscoque maculatd ; 

 anfractibus rotundatis, ultimo subangulato, apice roseo ; aper- 

 turd apertd, orbiculatd, intus viridi margaritaced ; labio albo ; 

 umbilico callo albo obtecto. 



Hab. Mataineka, Sandwich Islands. 



Mr. Oswald then communicated the following remarks by Mr. Mack, 

 on the fact of black eggs being laid by a white duck of the ordinary 

 domestic breed : — 



" The egg (observes Mr. Mack) which is herewith sent was laid 

 by a white duck, one of two belonging to Mr. Dickinson of Mitcham, 

 which stray during the day on the common, but are confined at night. 

 The drake was lost about a month since, and then one of the ducks 

 commenced laying black eggs, the other still continuing to lay white 

 ones, — she laid ten or twelve and then ceased for some days ; she has 

 again commenced laying black eggs. The ducks are fed once a day 

 with barley, at the time the other poultry are fed. 



" Mr. Dickinson, showing the egg this morning to one of the 

 guards on temporary duty on the Brighton rail at Croydon, he said 

 he had a duck which laid the same colour, or even blacker, and that 

 he had raised (at East Bourne) two brbods of ducks from black 

 eggs." 



Haling Cottage, Croydon, May 24, 1851. 



June 10, 1851.— John Gould, Esq., F.R.S., in the Chair. 



1. On two new species of Birds of the genus TjENIoptera. 

 By Philip Lutley Sclater, B.A., F.Z.S. etc. 



T^nioptera erythropygia, Sclater. T. nigrescens ; vertice 

 fronts guldque canescente-griseis ; maculd secundariorum albd; 

 uropygio, abdomine toto crissoque, cum tectricibus caudce supe- 



