TRICHODINA. 



[ 652 ] 



TRICHOMANES. 



to theNostochaceae, discovered by Ehrenberg 

 to produce the red colour ov er large tracts in 

 the Red Sea, and found also in the Atlantic 

 and Pacific Oceans by Darwin and Hinds, 

 and in the Chinese Sea. No vesicular cells 

 or spermatic cells have been detected, hence 

 the characters are as yet imperfect. Mon- 

 tague has separated the plant of Hinds from 

 Ehrenberg's, and Kiitzing characterizes the 

 two species in his Sp. Algarum, and figures 

 them in his Tabula Phycologicce, but neither 

 the figures nor the descriptions indicate any 

 very marked differences. r.nosi "io 



1. Tr. Ehrenhergii, Montague. Blood-red 

 (at length becoming green) ; bundles widish, 

 confluent; filaments 1-3000" in diameter, 

 joints about tvvice as wide as long. Mon- 

 tague, Ann. des Sc. nat. ser. 3. vol. ii. p. 360. 

 pi. 10; Kiitzing, Tab. Phyc. i. pi. 9. fig. 3. 

 Tr. erythrcBum, Ehr., Pogg. Annalen, 1830. 

 p. 506. Oscillaria erythrcea, Kiitz. Phyc. 

 generalis, 188. Found floating in vast strata 

 in the Red Sea by Ehrenberg and Dupont, 

 and in the Yellow Sea (China) by Mollien, 

 Bellot, and others. 



2. Tr. Hindsii, Montagne. Blood-red, 

 with a strong odour ; bundles longish, slen- 

 derish; filaments 1-3600 to 1-2760" in dia- 

 meter, joints twice or thrice as broad as long, 

 transversely graimlated. Montagne, Arm. 

 des Sc. nat. 3 ser. ii. p. 360. pi. 10 ; Kiitzing, 

 Tab. Phyc. i. pi. 91. iv. 



IT For further information on these species, 

 and on the red coloration of the sea by 

 plants, see Montague's papers inthe Annales 

 des Sc. naturelles, ser. 3. ii. p. 332, vi. p. 

 262 ; ser. 4. i. p. 81. 



TRICHODINA, Duj.— A family of Infu- 



soria. 



Char. Body soft, flexible, more or less 

 variable in form, ciliated ; mouth either 

 visible or simply indicated by a row or fringe 

 of larger cilia ; no cirrhi (styles or hooks). 



Genera: Acineria ; Dileptus; Pelecida ; 

 Trachelius ; Trichoda, D. (not E.). 



BiBL. Dujardin, Infus. 392. 

 • TRICHODINA, Ehr.— A genus of Infu- 

 soria, of the family Vorticellina. 



Char. No tail, nor pedicle ; cilia absent 

 from the surface of the conical or discoidal 

 body, but forming a frontal crown or a tuft; 

 oral orifice not spiral. 



T. pediculus {Urceolaria stellina, D.) (PI. 

 24. fig. 16). Body discoidal, the under and 

 upper surfaces, each with a crown of cilia. 



Parasitic upon Hydra vulgaris and viridis. 

 Breadth 1-575 to 1-290". On the under 

 surface is an annular undulatory membrane. 



and within and at the base of this is a horny 

 ring, with an outer and inner row of teeth, 

 forming an organ of adhesion. 



T. mitra. Parasitic upon Planaria torva. 



T. grandinella and T. vorax are swarm- 

 germs or free gemmae of Vorticellina. 



T. tentaculata. Body discoidal, cilia large, 

 forming a tuft ; a styliform, tentacle-like 

 process present. Aquatic; diameter 1-290". 



BiBL. Ehrenberg, Infus. 265 ; Dujardin, 

 Infus. 527 ; Siebold, Vergl. Anat, 12, Sie- 

 bold and Kolliker's Zeitschr. ii. 361 ; Stein, 

 Infus. 174. 



TRICHODISCUS, Ehr.— A genus of In- 

 fusoria, of the family Aciuetina, E. (Actino- 

 phryina, D.). 



Char, Body depressed, stalkless; seta- 

 ceous tentacles forming a simple row at the 

 margin of the body. 



T. sol (PL 25. fig. 8). Body suborbicular, 

 hyaline or yellowish, tentacles variable. 

 Aquatic; diameter 1-432 to 1-216". 



BiBL. Ehrenberg, Infus. 304. 



TRICHOGASTRES {Puff-balls).— A fa- 

 mily of Gasteromycetous Fungi, character- 

 ized by the contents of the leathery peridium 

 breaking up when mature into a pulverulent 

 mass of spores and filaments, without a 

 central column, the whole being expelled by 

 the bursting of the case (see Gasteromy- 



CETES). 



BiBL. Berkeley, Ann. Nat. Hist.iv. 155; 

 Tulasne, L. R. and C, Ann. des Sc. nat. 

 ser. 2. xvii. 1. 



TRICHOMANES,Linn.— A genus of Hy- 



Fig. 767. 



Trichomanes alatum. 



Fig. 766. A pinnule. Magnified 5 diameters. 



Fig. 767, Section through a sorus, showing the vein 

 prolonged as columella, and continued out beyond the 

 border. Magnified 25 diameters.'J'J'^H'S ncuiui 



