Zoological Society, 213 



Subgenus Photina, H. and A. Adams. 



Shell smooth, subcorneal ; 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 

 umbiUcated. 



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



perforatd, solidd, nigra, leevi ; anfractibus subrotundatis, trans- 

 versim sulcatis ; longitudinaliter oblique substriatd ; anfractu 

 ultimo gubangulato ; regione umbilicali impressd ; callo albo 

 obtecto. 

 Hab, ? 



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

 tidd,fusco variegatd; anfractibus parum convexis, transversim 

 sulcatis, ultimo subangxdato ; aperturd subrotundatd, intus 

 viridi iridescenti. 



Hab. ? 



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

 conicd, imperforatd, Icevi, albidd, viridi fuscoq^e macxdatd ; 

 anfractibus rotundatis, ultimo gubangulato, apice roseo ; aper- 

 turd apertd, orbiculata, intus viridi margaritaced ; labia 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 ^^^ (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 la>-ing 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 broods of ducks from black 

 jj 



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 T^nioptera. 

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



T^NioPTERA erythropygia, Sclatcr. T. nigrescens ; vertice 

 f rente guldque canescente-griseis ; maculd secundariorum albd; 

 uropygio, abdomine toto crissoque, cum tectridbus caudee supe- 



