GUTTULINA. 



[ 367 ] 



GYRINUS. 



solid form and as cement, in mounting 

 microscopic objects in cells. See Cements 

 and Prepauation. 



GUTTULINA. See Polymobphina. 



GY'GES, Boiy.— Described by Ehren- 

 bfrg as a genus of Volvocinete, having 

 neither eye-spot, tail, nor iiagelliform iila- 

 ment ; the carapace (cell-membrane) simple, 

 subglobose ; freshwater. 



Motion very slow. lie gives two spe- 

 cies : 



G. granuhmi (PI. 50. fig. 14). Ovate or 

 subglobose; internal granular mass dark 

 green ; diam. 1-11-50". 



G. bipartitm. Nearly spherical ; internal 

 mass yellowish green, frequently bipartite ; 

 diam.' 1-480". 



So far as appears from the descriptions 

 and figures, these do not seem to diifer 

 from Protococcus. 



(For G. sanyuinea^ Shuttleworth, see 

 Red Sxow.) 



BiBL. Ehr. I/) fits. p. 61. 



GYMNOAS'CUS, Bar.— A very minute 

 and simple form of Ascomycetous Fungi ; 

 found on horse- and sheep's dung. (Bara- 

 netzki, Bot. Zeit. 1872 ; Sachs, Bot. 310 ; 

 Eidam, Cohti's Beit. iii. 267 ; Jn. Mic. Soc. 

 1881, 489). See Ascomtces. 



GYMNODINTUM, Stein.— A genus of 

 Cilio-flageUate l\ii\xsox\?i^=Periclinia with- 

 out a lorica. 



7 species ; in fresh and salt-water (Kent, 

 Infus. 442). 



"G YMNOGON 'GRUS, Mart.— A genus of 

 Cryptonemiacefe (Florideous Algae), with 

 horny branched fronds, the divisions cylin- 

 drical or compressed, a few inches high, of 

 a purphsh-red colom-. The substance of the 

 branches presents three layers of closely 

 packed filamentous cells, the central lon- 

 gitudinal, the intermediate curved, and the 

 peripherical horizontal and moniliform. 

 The spores have not been observed; the 

 tetraspores (cruciate) are arranged in mo- 

 niliform rows, in wart-like thickenings of 

 the branches. 



BiBL. Harvev, Mar. AUj. 145, pi. 18 B; 

 Enql. Bot. pi. 1089 & 1926. 



GYMNOGRAMMA, Desv.— A genus 

 of Grammitidete (Polypodiaceous Ferns), 

 some of the species of which are remarkable 

 for a yellow or white pulverulent appear- 

 ance on the back of the fronds, owing to 

 the presence of abundance of microscopic 

 cellular hairs, ex. gr. G. Calomelanos, G. 

 cfiry-^opht/lla, ochracea, &c. Many species, 

 mostly tropical. (Hooker, Syn. Fil. 376.) 



GYMNOMIT'RIUM, Oorda.— A genus 

 of Jungermanniese (Ilepaticae), containing 

 one Britisli alpine species, the Jtinyennati- 

 nia co)ici)Uiaf(i of the British I'lora. 



BiBL. Hook. Brit. Juny. pi. 3; Ekart, 

 Si)n. Juny. pi. 8. fig. 63 : Enql. Bot. pi, 

 1022. 



GYM'NOPHRYS, Cienk.— A genus of 

 Reticularian Rhizopoda. 



(Jhar. Body naked, wdthout nucleus or 

 contractile vesicles. The pseudopodial re- 

 ticulations, which exhibit the granular 

 currents, arise from a few variable points of 

 the surface. 



G. cometa. In marine and boggy pools, 

 among algns. (Cienkowski, Schultze's Arch. 

 1876, xii. 31.) 



G YMNOSPER'MIA.— A division of the 

 Flowering Plants (see Vegetable King- 

 dom), including the Coniferje and Cyca- 

 dace^ ; deriving this name from the mode 

 of development of the Ovl'les. 



GYMNOSPORAN'GIUM, B.C.— A ge- 

 nus of Uredinei (Hypodermous Fungi). G. 

 juniperininn grows upon living branches 

 of the common Juniper, appearing at first 

 like an exanthema on the bark, which in wet 

 weather swells up into an orange-coloured, 

 tremelloid plicate mass, Avhich readily dries 

 up, however, and then is scarcely visible. 

 Somewhat rare, but when present generally 

 copious. 



BiBL. Berk. Br. Fl. vi. part 2. 361 ; 

 Fries, Syst. Myc. iii. 505 ; Tidasne, Ann. 

 Sc. Nat. 4 ser. 'ii. 171 & 188. 



GYMNOSPO'RIUM, Corda.— A genus 

 ofToridacei (Coniomycetous Fungi), cha- 

 racterized by an obscure mycelium and 

 unicellular black spores arising apparently 

 from the matrix. It is the lowest condi- 

 tion of which Torulacei are capable. 



G. arundinis occurs in this country on 

 reeds. 



BiBL. Corda,. Anleituny. 10: Berk. Oiitl. 

 32*^ 



GYMNOS'TOMUM, Schwagr.— A ge- 

 nus of Mosses now distributed into Py- 

 eamidium, Physcomiteium, and other 

 genera. 



BiBL. MiiUer, Syn. Mtisc. ; Bruch and 

 Schimper, Bryol. Eur. ; Wilson, Bryol. Br. 

 39 ; Berkeley, Handh. 237. 



GYPSI'NA, Carter. See Tinoporus. 

 GYRI'NUS, Geoffr.— A genus of Coleo- 

 pterous insects, of the family Gyrinidas. 



G. natator, one of the eight British spe- 

 cies of this genus, is very commonly seen in 

 groups performing its gyrations upon the 



