P1TTOSPORACEA 



PLANARIA. 



38 J 



ofwlim Uuiihuh; inr. bill, and fiyt, very bright vermilion-red. Total 

 learth 11 inchr* 2 or 8 linr*. 



The male and femaU bare near); the same livery. 



HM Young of the Yew differ in the colour of their bill and feet, 

 which are black ; in that of the wing*, which i a Urnished rusty -red, 

 ad in the very clear blue, which is nearly whitiih, of all the real of 

 the plumage. Thii blue tint i more vivid in middle age, and ptmnt 

 by degrees from bright axure-blue to celadon-green. Individuals 

 daring moult have the plumage varied with theto two tints very vivid 

 and pur*. 



It i a native of Jura and Sumatra. (Tenitninofc.) 







We. 



Otloriiama tlialauiuim. 



Sub-genus GraUaria. (Vieill.) 



G. Ktx (Roi dea Fourmilliers, Buff. ; King-Thrush, Lath. ; Tunha 

 Hex, Omel.). Brown, inclining to red, lighter beneath ; occiput plum- 

 beous; forehead varied with block and white. 



It is a native of South America, Guyana, and Brazil especially. 



Kir.f-Thru.Ji (Oral/aria Kti). 



HTTOSI'i >ll.\ < K.K are Polypetalous Exogenous Plants with a 

 definite number of hvpogvnous stamens, a superior 1- or 2-celled ovary, 

 which hi the furmer case Thai parietal placenta, numerous ovules, a sin- 

 gU ityU, and hard seeds containing a very small embryo in the region 



of the hilum. Their position in a nHtural arrangement is unsettled, 

 but appears to be near the Yitaceous Order, rather than the Rhamna- 

 ceoua or Polygalaoeoua. All the specie* contain in greater or less 

 abundance a resinous substance, the use of which is unknown. Many 

 of the species an pretty shrubs or bushes, sometime* extremely 

 graceful, but they are of no known use. Most of them are natives of 

 Australia. The names of Soliya and Itillanliera recal to the mind 

 some of the prettiest twiners of the greenhouse. [SOLI.TA ; Bib- 

 I.AHUIERA.] 



fitloiporvm tomrntotum. 



1, tbc itunens and pUUI ; 2, ripe fruit ; 3, the umc divided tramrcn. ly ; 

 4, a Kction of a seed with the minute embryo near Hie base. 



PITTZITE. [iBOKj 



PITUS, a genus of Fossil Plants. 



PI'TYLUS. [TANAORIN.B.] 



PLACENTA (Botany). [SEED.] 



PLACENTA (Schumacher), a genus of Moilutca. 



PLACENTA. [REPBODUCTIOS is ANIMALS.] 



PLACENTULA, a genus of Foraminifera. 



PLACOBRANCHIA'TA, or PLACOBRA'NCHID^E, M. Rang's 

 name for a family of Moliiaca, forming bis fifth family of Qtuteropoda 

 (Cuvier), but placed by Cuvier among his Xudibranchiata. [Nuw- 



BBANCHLATA.] 



PLACOBRA'NCHUa [NUIUBBANCUIATA.] 



PLACODINE (Arteniuret of Nickel), a Mineral which occur- in 

 crystalline masses and crystallised. Primary form an oblique rhombic 

 prism. Colour bronze-yellow; streak black. Fracture conchoiilal, 

 uneven. Hardness 5'0. Lustre metallic. Specific gravity 7'98 to 

 8-002. It is found at the Jungfer mine, Miisen. The analysis by 

 Plattner gives 



Arsenic 

 Nickel . 

 Cobalt 

 Copper . 

 Sulphur 



57-044 

 0-900 

 IrWI 

 0-617 



inn:: i 



PLACU'NA 



PLACUNANO'MIA. 



PLAOIODONTIA. [HTSTRICID.K.] 



PLAQIONITE, a Mineral which occurs massive and crystallUetl. 

 Primary form an oblique rhombic prism. Cleavage lateral, perfect, 

 but seldom affording smooth surfaces. Colour blackish lead-gray. 

 Fracture imperfectly conchoiilal. Hardness 2'5. Brittle. Lustre 

 metallic. Opaque. Specific gravity .V4. It is found at Wolfsberg iu 

 the Hare. The analysis by Rose and Kudernatsch gives 



Sulphur 21-53 



Lead 40-52 



Antimony 37'94 



99-99 



PLAQIOSTOMA. 



PLAGU-SIA. [GRAPHIC.*] 



PLAICE. [PLEUBOiticriD*. 



PLANA'RIA (Brown), a genus of Fossil Shells which are discoid, 

 and much resemble Planorba ; but the outer lip is reflected, and the 

 form is connidered to hnve been marine. Dr. Lra notes a species, 

 P. nileni, from the Cloiborne Beds, Alabama. J'lanaria had been uted 

 by Miiller, Lamarck, and others, to designate a genus of animals placed 

 by Cuvier among hi* Inteatinaux Parenchymateux, but they do not 

 live in other aniui.il*, and are only found in fresh or salt waters. 



