DACTYLOCOCCUS. 



[ 235 ] 



DAPHNELLA. 



Fig. 15-5. 



On decaying agarics, 

 Grev. Sc. Crypt. Fl. 



occurrence : it grows upon the surface of 

 the membrane within the shell of the eggs 

 of fowls and other birds. It 

 does not appear to have been 

 observed in this country ; but 

 several foreign writers have 

 investigated it ; and from the 

 experiments made by Spring 

 and Wittich, it appears that 

 the spores pass through ori- 

 fices existing in the shell, and 

 germinate in the interior, 

 often in the air-chamber. A 

 full account of this plant, and 

 of the literature, is given by 

 Ch. Robin. Many of the 

 species are undoubtedly coni--^ lium atrum> 

 diiferous forms of Sphcence A fertile flla- 

 (Tulasne, Carpologid). See ment with septate 

 DENDRYPHIUM and HELMIN- K e c 3 he s P n ita 



THOSPORIUM. British Spe-Magn.200 diams. 



cies : 



D. pyriforme, Fr. On mouldering stems 

 of herbaceous plants. 



D. macrosporum, Fr. On rotton wood, 

 leaves, and fungi. 



D. dendroides, Fr. 

 &c. Very common, 

 pi. 126. fig. 1. 



D. obovatum. Berk. On willow twigs, in 

 damp. Ann. Nat. Hist. vi. pi. 14. fig. 26. 



D, sphcerocephalum, Berk. On dead ivy- 

 twigs, L c. fig. 27. 



D. tenettum, Fr. On moss. 



BIBL. Berk, in Hook. Brit. Fl. v. pt. 2. 

 345 ; Ann. N. H. ut supra ; Berk, and 

 Broome, Ann. N. H. 2 ser. vii. 102 ; Robin, 

 Parasites, 2nd ed. 543, pi. 2. figs. 5 & 6 ; 

 Fries, Syst. Myc. iii. 414 j Summa Veget. 

 491. 



DACTYLOCOC'CUS,Nag. A genus of 

 Palmellaceous Algae, allied to CJiaracium 

 and Hydrianum. 



Char. Cells oblong or fusiform, free, 2-8 

 together, then separating. Two species, 

 one green ; among other Algae, or on the 

 side of pools ; about 1-2500" long. 



BIBL. Nageli, Einz. Alg.- p. 85 ; Raben- 

 horst, Fl. Alg. iii. p. 46 (fig.). 



DACTYLOP'ORA, Lam. Regarded by 

 some as one of the Foraminifera imper- 

 forata ; but by others as belonging to the 

 calciferous Algae. The simplest form pre- 

 sents a set of sac-like chambers, side by 

 side, for a part or the whole of a circle, 

 with their mouths in one direction along 

 the inner median line. Various modifica- 

 tions lead to the structure of a cylinder of 



such rings, with interspaces, thickened 

 walls, and subsidiary cavities. The simple 

 forms (D. eruca, PI. 23. f. 63) live in the 

 tropical seas. The more complicated species 

 are of Tertiary age in France, Italy, and 

 San Domingo ; D. reticulata (PI. 23. f. 54) 

 is one of these. 



BIBL. Parker and Jones, Ann. N. H. 

 ser. 3. 473; Carpenter, For. 127;Gumbel, 

 Abh. lay. Akad. 1872. 



DACTYL'OPUS, Glaus. A genus of 

 Entomostraca, order Copepoda. 



D. tisboides. Marine. 



BIBL. Glaus, Copepod.I27 '; Brady, Trans. 

 Northumberland. 



DALTO'NIA,Hook. andTayl. A genus 

 of Pleurocarpous Mosses, the species given 

 being restored here on account of the struc- 

 ture of the leaf ; while D. heteromalla of 

 Hooker goes to Hypnum on the same 

 ground. 



D. splanchnoidesjllook. &nd.T.=Hookeria 

 splanch. Hook. 



DAM^E'TJS, Koch. See BELBA. 



DAM'MARA-"ww." The resin of 

 Dammara australis, N. O. Pinaceae. It is 

 often used, dissolved in benzole, as a 

 varnish ; and as it dries quickly, it is useful. 

 It is also largely used as a substitute for 

 Canada balsam ; but we prefer the latter. 



DANJE'A, Smith. A genus of Marat- 



Fig. 156. 



Danaea. 



Part of a pinnule with sori. 

 Magnified 5 diameters. 



tiaceous Ferns, whence the family is some- 

 times called also Dangeaceee. Tropical Ame- 

 rica. 



12 species. 



BIBL. Hooker and Baker, Syn. 442. 



DAPH'NE, L. See THYMELEACEJE. 



DAPHNEL'LA, Baird. A genus of 

 Entomostraca, of the order Cladocera, and 

 family Daphniadae. 



Char. Inferior antennae very large, pos- 

 terior branch two-jointed only. 



