442 Zoological Society. 



bulce inferioris basim circumdante, necnon aures, et capitis latera, 

 exinde super oculos tendente, et per latera colli corporisque sic et 

 alarum tectrices ductd; dorso splendide caruleo, quo colore tec - 

 trices alarum marginatce, alee, caudaque lavata sunt, guld, pectore 

 et abdomine in medio alb is ; rostro pedibusque rubris. 

 ong. tot. 5\ poll. ; rostri, !{ 

 Hab. Clarence, Fernando Po. 

 Crown of the head alternately banded with blue and black ; from 

 each nostril commences a large j^atch of rufous, which envelopes the 

 base of the lower mandible, ears, and sides of the head, forms a broad 

 stripe over the eye, and extends along the sides of the neck and body, 

 and also over the under wing-coverts ; the back is ultramarine blue ; 

 the upper wing- coverts are tipped, and the wings and tail glossed 

 with the same hue ; the throat and the centre of the chest and abdo- 

 men are Avhite ; bill and feet red. 



This beautiful species is very closely allied to the Halcyon cyanotis, 

 Sw., but may at once be distinguished by the centre of the abdomen 

 being white, which circumstance suggested the name. It is a shy 

 bird. 



Mr. Lovell Reeve then communicated a paper by Sylvanus Han- 

 ley, Esq., in which the author describes, subjoined, five new species 

 of shells belonging to the genus Donax, a group of Acephalous Mol- 

 lusks. 



Donax semisulcata. Don. testa abbreviato-cuneiformi, totd albido- 

 lutescente, nitidd, postice attenuatd, lavigatd, maryine dorsali valde 

 declivi ; antice brevissimd, truncatd, transversim sulcatd et longi- 

 tudinaliter striatd ; margine anteriore subrecto ; vulvd decussatd, 

 lateribus subangulatd ; intiis margine crenulato. 

 Long, f poll. ; lat. h poll. 



Hab. } Mus.'Stainforth, Metcalfe, Hanley, &c. 



A very distinctly characterized shell, which bears little resemblance 

 to any other species of this genus, with the exception of the strami- 

 nea of Schrcetter. That rare and almost forgotten shell differs from 

 ours in the following particulars. The shape is altogether more 

 rounded, the ventral edge less arcuated, the edges of the anterior 

 slope rounded, and its transverse striae obsolete. Moreover the 

 posterior margin is entire. 



DoNAX PUNCTATO-STRIATA. Don. tcstd subtriungulari, valde con- 

 vexd, pallide livido-fuscd, radiatim punctato-striatd, margine dor- 

 sali utrinque valde declivi, ventrali medio arcuato ; vulvd longitu- 

 dinaliter argute striatd, lateribus obtusis ; intiis purpurea, margini- 

 bus dentatis ; dentibus lateralibus in utrdque valvuld duabus. 

 Long. I poll. ; lat. li poll. 



Hab. ? Mus. Stainforth, Metcalfe, Hanley, &c. 



Combining the outhne of the striata of Linnaeus (not Chemnitz) 

 ■with the dotted striae of denticulata, this shell may nevertheless be 

 easily distinguished from either by the obtuse edge of its anterior 

 slope. The inner margin is strongly dentated, excepting at the an- 

 terior slope, where it is finely crenulated. I believe that it is found 



