NEMATHECIA. 



[ 455 ] 



NEPHROMA. 



lanconiei (Coniomycetous Fungi), the spe- 

 cies of which present two forms, one bearing 

 minute conidia {Nemaspora), the other 

 spores [Libertella, Desmaz.), and which pro- 

 bably also will be found to exhibit an asci- 

 ferous form. N. crocea, Pers. is common 

 on beech-trees, N. Roscb on roses and lilacs. 

 They are at first minute gelatinous masses 

 of conidia, coherent into a nucleus under the 

 epidermis, devoid of a perithecium ; the 

 spores finally exude as a gelatinous tendril ; 

 the spores are curved and of an orange- 

 colour. 



BiBL. Berk. Brit. Fl. ii. pt. 2. p. 355 ; 

 Fries, Summa Veg. p. 413; Desmaz. Ann. 

 des Sc. nat. 1 ser. xix. p. 269. pi. 6. figs. 

 3-6. 



NEMATHECIA.— Wart-hke collections 

 of vertical filaments found on the surface of 

 the fronds of the Cryptonemiacese (Flo- 

 ride^). 



NEOTTIOSPORA, Desmaz.— A genus of 

 Sphseronemei (Coniomycetous Fungi), re- 

 markable from the fusiform spores being 

 furnished with three or four terminal threads. 

 N. Caricum grows upon dead leaves of sedges, 

 bursting from beneath the epidermis by a 

 circular black orifice, from which an orange- 

 coloured (sometimes olive-coloured) gelati- 

 nous mass of spores escapes in the form of 

 a cirrhus. Diameter of conceptacles about 

 1-80''. 



BiBL. Desmazieres, Ann. des Sc. nat. 

 2 ser. xix. p. 346 ; Berk. & Broome, Ann. 

 Nat. Hist. 2 ser. xiii. p. 379. 



NEPA, Linn. — A genus of Hemipterous 

 insects. 



N. cinerea, the common water-scorpion, 

 is of a dii'ty brown colour, the body broad 

 and flat, with two long terminal respiratory 

 tubes, the anterior pair of legs stout and 

 greatly elbowed, the posterior formed for 

 crawhng and not swimming. 



PI. 26. fig. 2Q represents the trophi. The 

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

 lobes between the second and third joints ; 

 the four setse (mandibles and maxillae) 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 eggs are oval, and surmounted 

 by seven reflexed filaments. 



BiBL. Westwood, Introduction, &c.; Du- 

 four, Rech. s. I. Hemipteres. 



NEPENTHES, L.— A genus of Nepen- 

 thacese (Dicotyledonous Plants), in which 



the spiral vessels have fom- parallel fibres 

 (see Spiral-fibrous structures). 



NEPHROCYTIUM, Nageh.— A genus of 

 Unicellular Algae, perhaps merely decom- 

 posing spores of Spirogyra. 



BiBL. Nageli, Einzellig. Algen. p. 79. 

 pi. 3. fig. 2. 



NEPHRODIE.E.— A subtribe of Poly- 

 podaeous Ferns, w ith a cordate or reniform 

 indusium. 



I. Nephrodium. Sori reniform. Indu- 

 sium cordate, deeply tw^o-lobed at the base. 

 Veins pinnate. 



II. Fadyenia. Sori reniform. Indu- 

 sium cordate, deeply two-lobed at the base. 

 Veins anastomosing, with free venules. 



NEPHRODIUM, Schott.— A genus of 

 Nephrodieae (Polypodaeous Ferns); some of 

 the species are often placed in a distinct 

 genus, as Lastrcea, and these made part of 

 the old genus Aspidium. Several species are 



indigenous. 



Fig. 513. 



Nephrodium. 



A pinnule with indusiate sori. 



Magnified 5 diameters. 



NEPHROMA, Ag.— A genus of Parme- 

 liaceae (Gymnocarpous Lichens). N. resu- 

 pinata, Sch. occurs on trees and mossy 

 rocks in subalpine districts. This genus 

 differs from Peltigera in the situation of 

 the kidney-shaped apothecia. 



BiBL. Hook. Brit. Flor. ii. pt. 1. p. 220, 

 Eng. Bot. pi. 305. 



