GOMPIIILLUS. 



[ 360 ] 



GONATOZYGON. 



Fig. 283. 



Glyphomitrium Daviesii. 

 Teeth of the peristome. Magnified 150 diams. 



pith, also, contain curious branched liber- 

 cells. 



GOMPHIL'LUS, Nyl. A genus of 

 Lichenaceous Lichens. 



G.calycioides. On mosses, rare. (Leigh- 

 ton, Lich.-Flora, 50.) 



GOMPHOGRAM'M A, Braun. A genus 

 of Diatomaceae, cohort Fragilarieae. 



Char. Frustules solitary or geminate, 

 front view tabellar, with interrupted clavate 

 longitudinal vittae, ends internally dentate ; 

 valves ovate or elliptic-lanceolate, with 

 transverse continuous costae. 



G. rupestre (PI. 52. fig. 3). On moist 

 rocks (freshwater). 



BIBL. Rabenhorst, Fl. Alg. i. 116; and 

 p. 12 (fig.). 



GOMPHONE'MA, Ag. A genus of 

 Diatomaceae. 



Char. Frustules mostly single or binate, 

 attached by a filiform stipes, wedge-shaped 

 in front view; valves with a median line and 

 a nodule at the centre and at each end, and 

 striated with transverse or slightly radiating 

 granular striae. Freshwater and fossil. 



Conjugation has been observed in several 

 species. 



Kiitzing describes thirty-eight species ; 

 Smith admits twelve as British. The form 

 of the frustule is subject to great variety ; 

 and the specific characters are probably of 

 little value. 



The most common species are : 



G. acuminatum (PI. 16. fig. 34 a, 5, c). 

 Frustules in front view simply cuneate, or 

 inflated in the middle ; valves attenuated at 

 the base, ventricose in the middle, beyond 

 which they are again expanded ; ends acu- 

 minate, or truncate with an acuminate pro- 

 longation; striae distinct; length of frustules 

 1-360". San Fiore deposit. 



G. geminatutn. Valves ventricose in the 

 middle, constricted and rotundo-truncate 

 towards each end ; striae distinct ; stalks 



long, thick, densely interwoven ; length of 

 frustules 1-216 to 1-180". 



G. olivacewn. Densely crowded, forming 

 a mucous mass ; frustules broadly cuneate 

 (fr. v.) ; valves obovato-lanceolate ; striae 

 distinct ; length of frustules 1-1020". 



G. curvatum. Frustules curved ; valves 

 obovato-lanceolate ; striae faint ; length 

 1-720". 



BIBL. Ehr. In/us. 215 ; Kutzing, Jiariff. 

 84, and Sp. Alg. 63 ; Smith, Br. Diatom. 

 76; Ralfs, Ann. N. H. 1843, xvi. 459. 



GOMPHOSPILE'RIA, Ktz. A genus 

 of Palmellacese ; with the cells radiating, 

 and united into groups in a globose mucous 

 envelope. 



G. aponina. In pools. (Rabenhorst, Fl. 

 Alg. ii. 55.) 



GONATOBO'TRYS,Corda. A genus of 

 Mucedines (Hyphomycetous Fungi), the f er- 



Fig. 284. Fig. 285. 



Gonatobotrys simplex. 



Fig. 284. A fertile filament. Magn. 100 diams. 

 Fig. 285. A sporiferous joint, with most of the 

 spores removed. Magn. 600 diams. 



tile filaments of which present at intervals 

 swollen articulations, on which are attached 

 simple ovate spores (figs. 284, 285). 



BIBL. Corda, Icones Fungorum. 



GONATOR'RHODON, Corda. A 

 genus of Mucedines (Hyphomycetous 

 Fungi), the fertile filaments of which have 

 at intervals swollen articulations, whence 

 arise moniliform chains of spores (fig. 286). 



BIBL. Corda, Prachtfl. europ. Schimmelb. 

 pi. 3. 



GONATOZY'GON, De Bary.-A genus 

 of Diatomaceae. 



Char. Cells cylindrical or truncate-fusi- 

 form, neither constricted nor incised, united 



