1886.] 



MICKOSCOPICAL JOCTRNAL. 



171 



out neck or projection of varying form 

 (trichogynium) . Fructification by 

 spherical spores or male elements 

 (spermatozoides, antherozoides) pro- 

 duced in the ends of 1-2 celled 

 branchlets, or in special parts of the 

 surface of the thallus, single or in 

 groups (antheridia) , one in each 

 mother cell These float in the water 

 and adhere to the trichogyne and 

 fertilize it. The neighboring cells 

 beneath the trichogyne, the so-called 

 trichophore apparatus, give rise to 

 a bunch of short branches, the term- 

 inal cells of which produce the re- 

 productive cells, the carpospores. 



A sexual propagation by gonidia 

 which, like the carpospores, are pro- 

 duced at the points of special branch- 

 lets, or between cells of the surface 

 of the thallus, usually 4 in a mother 

 cell (tetraspores) , not motile. 



The florideae contain a red color- 

 ing matter, phycoerythrin, or a blue, 

 phycocyanin, in addition to chloro- 

 phyll, and therefore usually are vio- 

 let, purplish red, blueish green, brown 

 or black. 



XV. Family Lemaneace.e. 



Simple or somewhat branched, 

 setaceous, conferva-like, hollow fila- 

 ments. Spores produced on the sur- 

 face in special zones. Carpospores 

 formed within the tubular filaments. 

 No tetraspores. 



137. Genus Lenianea Bory. 



Rather large, robust, bristle-like 

 filaments, of a dark, bluish green, 

 brownish or black color. The single 

 filaments simple or branched, usually 

 nodular. Thev are attached to a fil- 

 amentous mass, scarcely visible to the 

 naked eye (thallus) , which is attached 

 by hair roots, and from which arise 

 the thick, hollow, fruiting threads. 

 XVI. Family Batrachosperma- 



CE.E. 



Branching filaments, consisting of 

 a principal axis and a more or less 

 developed system of branching. 

 vSpermatozoids and cai-pogonia 

 formed at the ends of branchlets. 

 Tetraspores at the ends of branchlets. 



138. Genus Batrachospermum. 



Roth. 



Branched filaments, slippery, soft, 

 consisting of a branched principal 

 axis, made up of a simple series of 

 colorless, cylindrical cells. At the 

 upper end of each of these cells orig- 

 inates a series of cortical cells, and 

 clustered f a s c i c 1 e s of moniliform 

 branches of cells. 



139. Genus Chantratisia Fries. 

 Small, steel-blue, brownish or red 



tufts. Filaments consisting of a sin- 

 gle series of cells, straight, branch- 

 ing, naked, fasciculately branched 

 above, joints cylindrical. 



Carpospores formed in small tufts 

 at the ends of small branchlets, as in 

 Batrachospei'?7i7im . 



Asexual propagation by tetraspores, 

 formed at the ends of cells like the 

 carpospores, not often observed. 

 XVII. Family Hildenbrandtia- 



CE.E. 



Thallus membranaceous. Tetra- 

 spores sunk in receptacles in the 

 thallus. Propagation unknown. 



140. Genus H i I d e )ibr a ltd t i a 

 Nardo. 



Membranous, spread out flat, on 

 the matrix upon which it grows, con- 

 sisting of several layers of small, 

 spherical cells, with red contents. 



o 



■ — King's amber cement, prepared by the 

 Rev. J. D. King, and, we believe, sold by 

 dealers generally, is prepared as follows : 

 Dissolve 453 grammes of best bleached 

 shellac in half a litre of 95 per cent, alco- 

 hol. Dissolve I part of gum mastic in 2 

 parts of alcohol, and let stand until clear. 

 To the shellac solution add 38 grammes 

 of the mastic solution, color with dragon's 

 blood dissolved in alcohol, and filter. 

 Place it on a water bath and stir fre- 

 quently until it comes to boil. Filter 

 through flannel. Thin with alcohol if 

 necessary. 



• — King's lacquer finish, which was also 

 recommended in a recent article in these 

 columns, is made as follows : — Dissolve 

 I part of bleached shellac in 2 parts of 95 

 per cent, alcohol. To every 38 grammes 

 of I add 5 grammes of 2 and 5 grammes 

 of Brown's rubber cement. This is highly 

 commended as a color finish for mounts. 



