NEMALEON. 



[ 535 ] 



NEPIIROSELlNriS. 



includes the following Sphfrrm of the 

 liritisli Flora — cinndharina, coccinen, ochra- 

 cca, aurnntiit, i-osella, citrina, Pezizci, san- 

 yuinea, episplucrid, kc. ; and several new 

 species are described by Messrs. Berkeley 

 and Hroome. 



EiUL. Fries, Smn. Vecj. 387 ; Berk. & 

 Broome, Ann. N. H. 2 ser. xiii. 467 ; Cooke's 

 HancU). 780. 



NEMA'LEON, Tarji-ioni. — A genus of 

 Cryptonemiaie* (Florideous Algae), con- 

 taining two British species, one, N. muUiJi- 

 dum, not uncommon on shells and stones 

 near low-water mark. Its frond consists of 

 a somewhat cartilaginous, simple or once or 

 twice dichotomous cord, 3 to G" high and 

 1 to 2" in diameter, of a dull purple coloiu-. 

 The cord consists of a dense axis formed of 

 interlaced longitudinal filaments, clothed 

 with horizontal, dichotomously-branched 

 filaments, moniliform and coloured towards 

 the circumference of the cord. The fruit 

 consists oi :—favelUdia, consisting of glo- 

 bular masses of spores attached singly to 

 the filaments of the periphery, witli a tri- 

 chogyne (PI. 4. fig. 12 c) ; and collections 

 of antheridia, consisting of minute hyaline 

 cells seated on the peripheral filaments, but 

 discharging spermatozoids (PL 4. fig. 12 h). 



BiBL. Harv. Mar. Alg. 153, pi. 21 B, 

 Phyc. Br. pi. 36 : Derbes and Solier, Ann. 

 Sci. Nat. 3 ser. xiv. 274, pi. 35 ; Thuret, 

 ihid 4 s^Tt 111. 21. 



NEMAS'PORA, Fries.— A supposed ge- 

 nus of Melanconiei (Couiomycetous Fungi), 

 the species of which present two forms, one 

 bearing minute conidia {Nemaspora), the 

 other spores (Liherfella, Desmaz.), and which 

 probably also will be found to exhibit an 

 asciferoiis form. X. crocea, Pers., is common 

 on beech trees, N. Rosre on roses and lilacs. 

 They are iit first minute gelatinous masses 

 of conidia, coherent into a nuclt'us under 

 the epidermis, devoid of a perithecium ; the 

 spores finally exude as a gelatinous tendi'il ; 

 the spores are curved and of an orange- 

 colour. Nemaspora consists really of sper- 

 mogonous fruits, and Libertella of stylospo- 

 rous fruits of Ascomvcetous genera. 



BiBL. Berk. Br. Fl. ii, pt. 2. 355 ; Fries, 

 Sum. Veg. 413 ; Desmaz. An7i. Sc. Nat. 1 

 s^r. xix. 209. 



NEMATIIE'CIA.— Wart-likecollections 

 of vertical filaments found on the surface of 

 the fronds of the Cryptonemiaceje (Flo- 

 ride^). 



NEOTTIOS'PORA, Desmaz.— A genus of 

 Sphferonemei(Stylosporous Fungi), remark- 



able from the fusiform spores being fur- 

 nished with three or four terminal threads. 

 N. caricuni grows upon dead leaves of 

 sedges, bursting from beiieath the epidermis 

 by a circular black orifice, from which an 

 orange-coloured (sometimes olive-coloured) 

 gelatinous mass of spores escapes in the 

 form of a cirrhus. Diameter of conceptacles 

 about 1-80". 



BiBL. Desmazieres, Ann. Sc. Nut. 2 ser. 

 xix. 346; Berk. <& Broome, Ann. N. II. 

 2 ser. xiii. 379. 



NE'PA, Linn. — A genus of Ilemipterous 

 Insects. 



N. cinerea, the common water-scorpion, 

 is of a dirty brown colour, the body broad 

 and flat, with two long terminal respiratory 

 tubes ; anterior pair of legs stout and greatly 

 elbowed, posterior formed for crawling and 

 not swimming. 



PI. 33. fig. 26 represents the trophi. The 

 labium {i) is three-jointed, with two small 

 lobes between the second and third joints ; 

 the four sette (mandibles and niaxillfe) are 

 furnished with teeth, directed towards the 

 free end (and not as shown in the figure) ; 

 the lingua or tongue (*) is trifid at the 

 apex. 



The lateral tracheae are dilated opposite 

 the thorax to form two internal respiratory 

 sacs. The eo-o-s are oval, and ^^ith seven 

 reflexed filaments at one end. 



BiBi,, Westwood, Intr. ; Dufour, Hemip- 

 teres. 



NEPEX'THES, L.— A genus of Nepen- 

 thaceSB (Dicotyledonous Plants), in which 

 the spiral vessels have four parallel fibres 

 (see Spiral Structures), 



NEPHROCYTIUM, Nag.— A genus of 

 PalmeDacese ; consisting of 4-16 minute 

 reniform green cells, enclosed in an ample 

 envelope. 2 species ; in ditches and buggy 

 pools. (Rab. Fl. Alg. 62; IS'ag. Einzell. 

 Alg. 79.) 



NEPHRO'DIUM, Rich.— A genus of 

 Aspidieae (Polypodiaceous Ferns, fig. 224. 

 p. 320). A very large number of species, 

 cosmopolitan. "^Brit. sp. : N. Filix-mas, 

 Theltjpteris, Oreopteri^ {montnmmi), rit/i- 

 dum, cristatum, spinidosimi (dilatatuin), and 

 CBTnfda. 



NEPHRO'LEPIS, Schott.— A genus of 

 Aspidiefe (Polypodiaceous Ferns). 7 spe- 

 cies, tropical. (Hooker, Si/n. 300.) 



NEPIIR0'3IIUM, Nyl.— A genus of 

 Lichenaceous Lichens. Three species; rare. 

 (Leighton, B. Lich. Fl. 99.) 



NEPIIROSEL'MIS, Stein.— A genus of 



