TRIPOSPORIUM. 



[ 655 ] 



TROMBIDIUM. 



minate (in the first summer), but produce 

 only a long, filiform process, probably the 

 rudiment of a newmycelium (see UREDINEI). 



BIBL. Berk. Brit. Flor. ii. pt. 2. p. 368 ; 

 Tulasne, Ann. des Sc. nat. ser. 4. ii. p. 181. 

 pi. 10; Fries, Summa Veg. p. 513. 



TRIPOSPORIUM, Corda. A genus of 

 Dematiei (Hyphomycetous Fungi), charac- 

 terized by three lobed septate spores. T. 



Fig. 771. 

 t 



wldo aj 



Triposporium elegans. 

 Magnified 200 diameters. 





ctt/ aiiJ Wfirf gi doitf?/ iooi 

 elegans (fig. 771) has been found in this 

 country on bare oak trunks. Another spe- 

 cies, T. Gardneri, forms a blight on the 

 coffee plantations of Ceylon. 



BIBL. Berk. Ann. Nat. Hist. 2 ser. vii. 

 p. 98 ; Hortic. Journal, iv. p. 8. 



TRITON, Laur. A genus of Reptiles. 



If a male and female T. cristatus (fig. 



Fig. 772. 



772), one of the common water-newts, be 

 kept in a glass jar with healthy water-plants, 

 they will lay their eggs upon them. The 

 larvae are very beautiful microscopic objects, 

 for showing the circulation in the gills and 

 tail, the chorda dorsalis and the embryonic 

 tissues; they should be kept in a vessel 

 separate from the parents, otherwise these 

 will devour them. 



The injected skin of T.palustris, the large 

 warty newt, forms a beautiful opake object ; 

 showing the loose capillary network, which 



contrasts well with the brilliantly mottled 

 skin. 



BIBL. Bell, British Reptiles. 



TROCHILIA, Duj. A genus of Infu- 

 soria, of the family Ervilina. 



Char. Body irregularly oval, narrower in 

 front, where there are some vibratile cilia ; 

 carapace obliquely furrowed, slightly twisted, 

 and terminated behind by a moveable 

 pedicle ; no distinct mouth. 



T. sigmoides (PI. 25. figs. 12 & 13). Body 

 narrowed and sinuous in front; carapace 

 with five or six rounded oblique ribs ; 

 pedicle capable of adhering to the slide. 

 Marine; length 1-630". 



Fig. 12 represents the animal undergoing 

 transverse division. 



TROMBIDIUM, Latr. A genus of 

 Arachnida, of the family Trombidina. 



Char. Palpi large, free; mandibles un- 

 guiculate ; body turgid, bearing the four 

 posterior legs, and an anterior narrow 

 moveable eminence, upon which the eyes, 

 the four anterior legs and the mouth are 

 situated ; anterior legs longest. 



The species are numerous and not well 

 characterized. 



T. phalangii (PL 2. fig. 37). Body sub- 

 triangular, angles obtuse ; of a velvety ap- 

 pearance, from the presence of numerous 

 plumose hairs ; eyes two, placed upon auri- 

 cular appendages. 



An external parasite of Phalangium (the 

 harvest-spider) and insects, at least in its 

 early hexapodous stage. 



T. elongatum. Crimson ; eyes approxi- 

 mate. Found under stones. 



T. cinereum (PI. 2. fig. 40), (Rhyncholo- 

 phus ciner. Dug. Body with brown and 

 greyish-white spots ; hairs spathulate ; eyes 

 two on each side. Length 1-12". Found 

 in ditches amongst plants and stones. 



T. autumnale (PL 2. fig. 38), (Leptus 

 autumn.}. The harvest-bug. This well- 

 known, but imperfectly examined arach- 

 nidan insinuates itself into the human skin 

 in autumn, causing troublesome irritation. 

 It is found on plants and the stubble of corn- 

 fields, and may easily be caught by tying a 

 white pocket-handkerchief around the legs, 

 and walking through stubble-fields. The 

 young form with six legs is most frequently 

 met with. 



BIBL. Duges, Ann. d. Sc. nat. ser. 2. i. 

 36; Gervais, Walckenaer's Apteres, iii. 178; 

 Johnston, Transact, of Berwickshire Natu- 

 ralists' Club, 1847. 221 ; Koch, Deutschl 

 Crustac. Myriap. fyc. 



