TRICHOMANES. 



[ 781 ] 



TRICHORMUS. 



TRICHOM'ANES, Linn. A genus of I 

 Hymenophyllaceous Ferns, of elegant and i 

 delicate habit. 



Fig. 761. 



Fig 762. 



Trichomanes alatum. 



Fig. 761. A pinnule. Magnified 5 diameters. 



Fig. 762. Section through a sorus, showing the vein 

 prolonged as a columella, and continued out beyond the 

 border. Magnified 25 diameters. 



Fig. 763. 



A sporange, with horizontal annulus. Magnified 100 

 diameters. 



Many species ; tropical. T. brevisetum 

 (radicans'), British. (Hooker, Syn. 79.) 



TRICHOM'ONAS, Donne. A genus of 

 Flagellate Infusoria. 



Char. Free, soft, ovate, with two anterior 

 and one posterior flagella, and a dentate 

 lateral undulating membrane ; no mouth. 



T. batrachortim, in the intestine of frog 

 and toad. 



T. vagmalis (PL 32. fig. 9). Body glu- 

 tinous, nodular, unequal, frequently be- 

 coming agglutinated to other objects; move- 

 ment vacillating; length 1-2500". Found 

 in morbid vaginal mucus. 



T. limads (PL 32. fig. 10). Body ovoid, 

 smooth, pointed at each end; movement 

 forwards, by revolution upon its axis; 

 length 1-1600". Found in the intestine of 

 Limax agrestis. 



BIBL. Dujardin, Infus. 299 ; Kent, Inf. 

 308. 



TRICHONE'MA, From. A genus of 

 Cilio -Flagellate Infusoria. Free, ovate, 

 variable j flagellum single; body with short 



cilia. T. hirsuta: freshwater. (Kent, Inf. 

 469.) 



TRICHONYM'PHA, Leidy. A genus 

 of Holotrichous Infusoria. T. agilis, in the 

 intestine of the American white ant. 

 (Leidy, Proc. Ac. Philadelphia, 1881 ; Kent, 

 Inf. 533.) 



'TRICHOPH'RYA, 01. & Lachm. A 

 genus of Acinetina. Like Podophrya, but 

 fixed without a pedicle j tentacles in scat- 

 tered bundles; vesicles numerous; nucleus 

 band-like. Two species ; on the stalk of 

 Epistylis plicatilis, and on Entomostraca. 

 (01. & Lachm. Inf. 386: Kent. Inf. 811.) 



TRICHOPH'YTON. See PARASITES. 



TRIC'HOPUS, Clap. & Lach. A genus 

 of Hypotrichous Infusoria. 



Char. Body depressed, with a bundle of 

 long ventral cirri near the posterior end of 

 the body ; a tuft of caudal cilia, and a group 

 of pharyngeal teeth. 



T. dysteria ; marine. (Claparede & Lach- 

 mann, Inf. 338.) 



TRICHOR'MUS (Anabcma, Bory, Br6- 

 bisson, Kiitzing, Montagne, <fcc.). A genus 

 of Nostochacese (Confervoid Algae), grow- 

 ing on wet earth, and rising to the surface of 

 lakes, brackish ditches, &c., forming an in- 

 determinate stratum, at first nearly colour- 

 less and transparent, with the filaments 

 sparingly scattered through the mass; the 

 filaments afterwards increasing rapidly in 

 number, causing the mass to become opaque ; 

 deep bluish green, and occasionally mottled 

 with brown, especially beneath. Filaments 

 mostly short and moniliform. Cells more 

 or less globular ; the spermatic cells resem- 

 bling the ordinary cells more in this than 

 in the allied genera. The filaments closely 

 resemble those of Nostoc ; and some of the 

 floating aquatic species can only be distin- 

 guished from that genus by the absence of 

 definite form or size, and of the hardened 

 periderm. It differs from Dolichospermum 

 in the globular shape of its sporangia, and 

 from Spheerozyga and Cylindrospermum in 

 the arrangement of its vesicular and sper- 

 matic cells, which are in Trichormus sepa- 

 rated by ordinary cells. In PL 8. fig. 2, we 

 have represented what appears to be a new 

 species. 



T. flos-aqiice. Filaments flexuous or 

 curved, moniliform; cells orbicular, vesi- 

 cular ones larger, terminal and interstitial. 

 Ralfs, Ann. N. H. 2. v. pi. 8. fig. 2. Ana- 

 baina fl.-aq., Kiitz. Sp. Alg. ; Trichormus 

 incurvatus, Allman, Ann. N. H. xi. 163; 

 Hassall, Algce, pi. 75. Rising to the surface 



