IlELMINTITOSTACIIYS. 



[ 385 



HEMP. 



(1849); Ciirrov. Qu. Mic. Jn. v. 115: Tulasne, 

 Ann. >SV\ Nat.' A ser. v. lUO. 



HELM INTHOS'TACII YS, Kaulf— A 

 geuiis of Ophioglussaceous Ferus, distin- 

 guished by the complex spikes bearing 

 crested sporanges. 



Fig. 314. 



Fig. 315. 



Helminthostachys zeylanica. 



Fiij. 314. Fragment of a spiie with sporanges. Mag- 

 nified 10 diains. 

 Pig. 31.5. A portion stUl more magnified (20 diams.). 



HELVEL'LA, L. — The typical genus of 

 Helvellacei. 



Several species occur in this country, 

 among.st which II. lacunosa and H. crispa 

 are esculent. 



BiBL. Fr. Syst. Myc. vol. ii. 13 ; Berk. 

 Outl. 358 : Hooker, 8yn. 447. 



HELYELLA CEI.^A family of Asco- 

 mycetous Fungi, comprised in Discomycetes, 

 approaching the Hymenomycetes in outward 

 form, but distinguished at once by their 

 fructification. See Ascomycetes, IIel- 

 TEULA, Spathulaeia, Leotium, Stictei, 

 Peopolis. 



HEMELYT'RA.— The anterior pair of 

 wings of the Heteropterous division of the 

 Hemiptera. See Insects. 



HEMEPtO'BIUS, [Linn.— A genus of 

 Neuropterous Insects. 



Hemerobhis (^Chrysojjd) peria, one of the 

 lace-winged flies, has very thin, transparent, 

 and beautifully netted iridescent wings, in 

 which the circulation can be well observed; 

 the wings also exhibit well the tracheae in 

 the veins. The larva feeds upon Aphides. 



BiBL. Westwood, Intr. ; Bowerbank, 

 Entom. May. iv. 



HEMIAU'LUS, Ehr.— A genus of Dia- 

 tomacese. 



Char. Frustules single, compressed, sub- 

 quadrate, with two tubular processes on each 

 side^ the ends of those (the shorter) on one 



side being open, the others closed ; not con- 

 stricted at the sides. 



H. antarcttcus (PI. 25. fig. 3). 



BiBL. Ehrenberg, licrl. Bet: 1S44, 109 ; 

 Greville, Ann. N. IL xvi. 5 ; id. Mic. Tr. 

 18(35, 20, 52, 101. 



HEMIDIN'IUM, Stein.— A genus of 

 Cilio-flagellate Infusoria: free, flagellum 

 single ; a fringe of cilia in a groove exten- 

 ding halfway round the body. II. na- 

 sufum, yellow ; freshwater. (Kent, Infus. 

 442.) 



HEMIDIS'CUS, Wall. — A genus of 

 Diatomacese. 



C7ta)\ Fr. free ; valves arcuate, with a 

 median marginal inf eiior nodule ; areolation 

 hexagonal, radiate. 



//. cuneiformis. From Salpcs, Bay of 

 Bengal and Indian Ocean. 



BiBL. \Vallich, Mic. Tr. 18G0, liii. 42 



(%.). 



IIEMILEI'A, Berk.— A genus of Ure- 

 dineas (Hypodermons Fungi), characterized 

 by the meniscoid spores, which are smooth 

 within, but strongly granulated without. H. 

 vastatri.v, the Coffee-fungus, is extremely 

 destructive to the CoHee-plants, forming 

 orange-brown spots upon the leaves. One or 

 two other Rubiacese are attacked by a 

 distinct species. In germination, a form of 

 Feniciliium has often been developed, but 

 this is probably accidental. 



BiBL. Berk. & Br., Jn. Zinn. Soc. xiv. 93 ; 

 Dyer, Qn. 3Iic. Jn. 1880, xx. 119 (fiR's.) ; 

 Abbay, Jn. Linn. Soc. xvii. 176; Ward, 

 3Jic. Jn. xxii. (fiofs.). 



HEMIOXI'Tl'S, Linn. — A genus of 

 Grammitideaj (Polypodiaceous Ferns), with 

 a very elegant reticulated arrangement of 

 the sori. 



Eight species ; exotic. (Hooker, Si/n. ML 

 398.) 



HEMIOPH'RYA.— A genus of Acine- 

 tina (Kent, Inf.). 



IIEMIP'TEPtA.— An order of Insects. 



HEMIP'TYCIiUS, Ehr. See Arach. 



NOIDISCXIS. 



PIEMITE'LIA; Presl.— A genus of Cya- 

 thpeous Ferns. Exotic. (Hook. Syn. 27.) 



HEMIZOS 'TER, Ehr.— (Ehrenberg, Ber. 

 Berl. Ak. 1844, 199). 



HEMP. — The ordinary name of the fibre 

 of Cannahis saliva, consisting of the liber- 

 fibres of this plant (PI. 28.''fig. 6). It is 

 applied to some other substances used for 

 the same purposes, e. ff. Manilla hemp (the 

 fibre of Musa) &c. See Textiee eibhes 

 and LiBEK, 



2c 



