s : : <. \ 



Nrssll'.l'.ITr:. 



retractile istaaheaUu; lingual 



Uteral Uwth; orifice* on the 



s>^*B*Vt *^4W 



la Ub family an TWimi'a, &ydM, 



~--~ "' 





, MM tnm atov* ; , frasi below. 



nisaii Ike Jk : . Mtaslt* ; . krssahlal clab-likt pro. 

 > W IV. orr>> *T tJMntts* j *, ortae* of Ik* anu ; (, foot ; 



As*Ml*il 



amuM along the aides of the back ; 



U*th 0.1.0; rami6caU.._ 

 aHliT W ,,Uodir^.<rtotb.dorJ papilla, ; excretory 



aiaueui (Lanwgrrut) Etfvrtii. DC BUlnville. 

 a, the mouth ; 6, the branchial cirrhi. 



PkyUirkoida. 



Animal pelagic, footless (apodal), compressed, swimming freely, with 

 a fin-like tail ; tentacles two, dorsal ; no branchiae ; lingual teeth in a 

 single series ; stomach furnished with elongated ccoca ; orifices on the 

 right side ; sexes united. 



This family has but one genus, Phillyrve (Eurydia, Each.). 



I'lyiioda. 



Animal shellless, limaciform, with no distinct mantle or breathing 

 organ ; respiration performed by the ciliated surface of the body ; 

 mouth anncd with a single series of lingual teeth ; stomach central ; 

 vent median, sub-central; hepatic organs branched, extending the 

 length of the body, and opening into the sides of the stomach ; sexes 

 united ; male and ovarian orifices below the right eye ; female orifice 

 in the middle of the right side ; heart with an auricle behind, and 

 traces of an arterial and venous system ; eyes sessile on the sides of 

 the head ; tentacle* simple or obsolete. 



The genera of this family <urcActmia, Cento, Limaponlia. 



(We are indebted for the chief part of this article to the yet un- 

 puliliilicd introduction to Messrs. Alder and Hancock's work on the 

 ' llritinh Nudibranchiata,' which the authors have kindly permitted us 

 to use. Of this work Messrs. Forbes and Hanloy, in the ' History of 

 Hriti.li Mollusca,' say that "it is one of the most beautiful and 

 perfectly executed works of which zoological science can boast") 



M I l.li'OKA. [CORALLINACBA] 



NUMB-FISH, a name for the Torpedo. [ELECTRICITY UK OHO ASIC 

 l: 



NUMENIUS. [ABOL--HAXMS.] 



NUMIDA. [PATOKIDJC.] 



NUMMULITES. [FoiuMiKtriiRA.] 



NUl'HAR, a genus of Plants belonging to the natural order 

 ffympMaacta. It has a calyx composed of five or six petal-like sepals; 

 the petals 10 to 18, much smaller than the sepals ; the stamens inde- 

 finite, which, as well as the sepals and petals, are inserted into the 

 base of the torus, so that the fruit appears as if it were superior. 

 The stigmas are from 10 to 18, and radiated. Carpels 10 to 18, inclosed 

 within the torus. The eprcie*, like those of the last genus, are elegant 

 aquatic plant*, and difler from them in appearance by their yellow 

 flowers. There are several species growing in various parts of Europe 

 and America. Of those the ff. lulea. Yellow Water-Lily, is the most 

 common. It has a calyx of 5 sepals ; the stigmas are entire, 16- to 20- 

 rayed, deeply ambilirated ; the leaves ovate-cordate; the lobes approxi- 

 mate; the petioles triquetrous with acute angles. This plant is a 

 native throughout Europe and in Siberia, and is also found in North 

 America. The flowers have a strong smell, like that of brandy, and 

 in many part* of the country the fruits are called Brandy-Bottles. 

 Thar* is a species very much resembling this in all points, except 

 that it is about half the size ; it is called .V. pumila, Dwarf Yellow 

 Water- Lily. It is a native of the North of Germany, Lapland, Norway, 

 and Scotland. There are five or six other species, all of them natives 

 of ponds and ditches of fresh water. There is a North American 

 specie*, ff. arlrtna, which grows in salt water as well aa fresh, and is 

 Terr plentiful about Philadelphia and also in Canada. 



NUH.HIK1UTE, a Mineral which occurs in crystals almost lenticu- 

 lar. Primary form a rhomboid. It is generally found implanted 

 in mammillary masse*. Colour yellow, grayish, or greenish. Streak 

 'ellowih-whiu, grayish. Fracture somewhat conchoidal. Hardness 

 4-0. Lustre greasy, feeble. Specific gravity 5'0416. Found in the 



