TRICHOSPHJERA, 



[ 782 ] 



TRINACRIA. 



of stagnant pools or other still waters, in 

 gelatinous bluish or green masses. 



T. spiralis. Filaments coiled or spiral ; 

 vesicular and spermatic cells orbicular. 

 Ralfs, 1. c. pi. 8. fig. 3 (?). Anabaina spi- 

 ralis, Thompson, Ann. N. H. v. 81 ; Spiril- 

 lum Thompsoni, Hassall, Br. Fr. Algce, 

 pi. 75. 



T. Thivaitesii. Filaments moniliform, 

 flexuous ; ordinary cells globular or nearly 

 so; vesicular cells larger, globular when 

 interstitial, ovate when terminal, ciliated; 

 sporangia oval, catenate. Ralfs, 1. c. pi. 8. 

 fig. 4. Salt marshes, forming thin, gela- 

 tinous dark-green patches, on damp soil or 

 the bottom of ditches, then floating and 

 abounding in spermatic cells. 



T. oscillarioides. Filaments elongate, 

 flexuous; ordinary joints subquadrate; ve- 

 sicular cells barrel-shaped or elliptic, naked j 

 spermatic cells oval, catenate. Ralfs, I. c. 

 pi. 8. fig. 5. Bluish green, in brackish 

 ditches. 



T. rectus. Filaments bright green, 

 straight. Ralfs, /. c. pi. 8. fig. 6 ; in pools. 



BIBL. Ralfs, Ann. N. H. 2. v. pi. 8; 

 Rabenht. Alg. ii. 293. 



TRICHOSPH^E'RA, Semper. A genus 

 of Rotifera. T. cequatorialis is spherical, 

 the rotatory organ consisting of an equato- 

 rial zone of cilia; found among worms, 

 infusoria, &c. in the rice-field ditches of 

 Zamboanga; diameter 1-36." (Semper, Sieb. 

 fyKoll. Zeitschr. 1875, Mn. M. Jn. xiv. 237.) 



TRICHOSPO'RIUM, Fr. A genus of 

 Mucedines (Hyphomycetous Fungi), nearly 

 allied to BOTRYTIS, characterized by a cees- 

 pitose mycelium, whence arise fertile conti- 

 nuous filaments, bearing solitary, simple, 

 acrogenous spores. T. nigrum= Sporotri- 

 chum nigrum, Fries 

 (Syst. Myc.^j Botrytis 

 nigra, Link. 



BIBL. Fries, Sum. 

 Veg. 492 ; Grev. Crypt. 

 FL pi. 274. 



TRICHOS'TOMUM, 

 Hedw. A genus of 

 Pottiaceous Mosses, so 

 called from the hair- 

 like peristome, resem- 

 bling closely that of 

 BARBULA (Tortula), 

 but with the teeth 



Straight ^nstead of Triehostomumrigidulum. 

 twisted ; in T. rigidu- Fragment of the peri- 

 lum, however (fig'. 764), stome with filiform teeth, 

 there exists a slight Magnified 100 diameters. 



Fig. 764. 



curling even in this genus. The Tricho- 

 stoma grow on the ground and on stones. 



TRICHOTHE'CIUM, Link (Diplospo- 

 rium, ejusd.). A genus of Mucedines (Hy- 

 phomycetous Fungi), growing upon dead 

 sticks, herbaceous parts of plants, &c., form- 

 ing a csespitose entangled mycelium, from 

 which arise erect fertile filaments, bearing at 

 the summit a few acrogenous, free, didymous 

 spores. From some observations recently 

 published by Hoffmann, and confirmed by 

 Bail, the spores of T. roseum, when they 

 germinate, produce a mycelium whence 

 arise fertile filaments of Verticillium ru- 

 berrimum, the " spores " of which they con- 

 sequently consider to be the spermatia of this 

 plant. Several species are British, as T. 

 roseum, obovatum (Dactylium, Berk.). 



BIBL. Berk. Er. FL ii. pt. 2. 348 ; Ann. 

 N. H. vi. 437, pi. 14 ; Greville, Crypt. FL 

 pi. 172 ; Fries, Sum. Veg. 492 ; Hoffmann, 

 Bot. Zeit. xii. 249 ; Bail, ibid. xiii. 673. 



TRICHY'DRA, Wright. A genus of 

 Hydroid Zoophytes. 



Char. Stem creeping, branched; cells 

 rudimentary, consisting of very short tubular 

 processes at intervals on the creeping stem ; 

 polypes cylindrical, very slender and exten- 

 sile, with a short conical proboscis. T. pu- 

 dica, marine, on shells &c. (Hincks, Hyd. 

 Zooph. 215.) 



TRILOCULI'NA, D'Orb. A subgenus 

 of Miliola, with the chambers aggregated 

 on three opposite faces, embracing, three 

 only apparent. 



Many species, both recent and fossil. 

 M. (TV.) trigomda (PL 23. fig. 4). 



BIBL. Williamson, Rec. Brit. For. 84 

 (Miliolina) ; Carpenter, For. 78. 



TRIMAS'TIX, Kt. A genus of Fla- 

 gellate Infusoria. Free, ovate, with a lateral 

 membranous border; flagella three, ante- 

 rior^ one directed forwards, the others 

 trailing. 



T. marina. In salt water with decaying 

 plants ; length 1-1400". (Kent, Inf. 312.) 



TRIMMATOSTRO'MA, Corda (fig. 769, 

 774). An obscure genus of Toru- 



cei (Coniomycetous Fungi), perhaps 

 founded on the spores of Phragmatotri- 

 chum. (Corda, Icon. : Fries, Sum. Veq. 

 475.) 



TRINA'CRIA, Heib. A genus of Dia- 

 tomaceee. 



Char. Frustules with three broad, bi- 

 spined, equal-] engthed processes, margin 

 pearly, angles naked. Danube. 



BIBL. Rabenht. Alg. i. 317. 



p. 



la 



