TRINEMA. 



[ 783 ] 



TRITON. 



TRINE 'MA, Duj. A genus of Rhizo- 

 poda, family Actinophryina. 



Char. Carapace membranous, diaphanous, 

 elongate-ovoia, narrower in front, with a 

 large oblique lateral orifice ; expansions two 

 or three, filiform, very slender, as long as 

 the carapace. 



T. acinus=Diffluciia enchelys, E. (PI. 32. 

 liir. 11, after Ehr. In Diijardin's figure the 

 expansions are represented as much more 

 slender.) 



BIBL. Duj. Inf. 249; Clap. & Lach. Inf. 

 455. 



TRINO'TON, Nitz8ch=Zbtfm pt. 



TRIOPHTHAL'MUS, Ehr. A genus of 

 Rotatoria, of the family Hydatiusea. 



Char. Eyes three, red, cervical, in a trans- 

 verse row; foot forked j jaws sin<rle- 

 toothed. 



T. dorsalis (PI. 44. fig. 31). Body crys- 

 talline, turgid, suddenly attenuated at the 

 foot, which is half the length of the body. 

 Length 1-48 to 1-36". (Ehrenberg, Inf. 

 450.) 



TRIPHRAG'MIUM, Link. A genus of 

 Uredinei ' (Hypodermous Fun- -p,. 

 ), distinguished by their tri- M f ,;, 

 locular spores (fig. 765). T. 

 ulmariee ( Uredo ulmarice, Brit. 

 Fl.~) grows upon the leaves of 

 Spiraea ulmaria, forming orange, 

 subsequently blackish, effused 

 patches, bursting from beneath m 

 the epidermis. Tulasne has ^ 

 shown that it possesses all three A pedicellate 

 forms of reproductive structure j^nfe^ 350 

 of the Uredinei, viz. 1. spermo- diameters, 

 gonia with spermatia ; 2. Uredo- 

 fruits, with ellipsoid or globose stylospores ; 

 and 3. perfect fruits, arising either among 

 the stylospores or in special sori, containing 

 stipitate three-lobed spores (fig. 765), each 

 lobe of which is unilocular and exhibits a 

 single pore in its black tubercular outer coat. 

 The last germinate in the spring, and pro- 

 duce from each pore a tubular filament 

 which becomes divided into four or five 

 chambers, from three or four of which arise 

 single styliform processes (sterigmata), each 

 bearing a small smooth spherical sppridium. 

 The globular stylospores also germinate (in 

 the first summer), but produce only a long 

 filiform process, probably the rudiment of a 

 new mycelium. (See UREDINEI.) 



BIBL. Berk. Br. Fl. ii. pt. 2.368; Tulasne, 

 Ann. Sc. Nat. 4. ii. 181, pi. 10 ; Fries, Sum. 

 Veg. 513 ; Currey, Micr. Jn. v. 126. 



TRIPLO'CERAS, BaU.= Docidium sp. 



TRIPOSPO'RIUM, Corda. A genus of 

 Dematiei (Hyphomycetous Fungi), charac- 

 terized by the three-lobed septate spores. 

 T. elegans (fig. 766) has been found in this 



Fig. 766. 



Triposporium elegans. 

 Magnified 200 diameters. 



country on bare oak-trunks. Another spe- 

 cies, T. Gardneri, forms a blight in the coffee 

 plantations of Ceylon. 



BIBL. Berk. Ann. N. H. 2. vii. 98 j Sortie. 

 Jn. iv. 8. 



TRITAXTA, Reuss. See TEXTULAEIA. 

 (Reuss, Site. Ak. Wien, xliv. 383.) 



TRITICEL'LA, Dalyell. A genus of 

 Ctenostomatous Polyzoa. Cells moveable ; 

 no gizzard. Three species. (Hincks, Polyz. 



TRITON, Laur. (water-newt). A genus 

 of Reptiles. 



If a male and female T. cristatus (fig. 767), 



one of the common water-newts, be kept in 

 a glass jar with healthy water-plants, they 

 will lay their eggs upon them. The larvje 

 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 

 water-newt, forms a beautiful opaque object, 

 showing the loose capillary network, which 



