B10MYXA. [ 



Tolles has invented a binocular eye-piece 

 (Beale, How #<?., p. 15, fig.) ; and Abbe 

 another : Jn. Mic. Soc. 1881, i. p. 298 (fig.). 



BIBL. Wenham, Micr. Tr. 1860, p. 154, 

 1861, p. 15, 1866, p. 103; Qu. Mic. Jn. 

 1861, p. 109 ; Holmes, M. M. Jn. 1869, iii. 

 p. 274 ; Stephenson, M. M. Jn. 1870, iv. 

 p. 61 ; Frey, D. Mikr. 1881 ; Carpenter, 

 The Microsc. 1881. 



BI'OLITE. See ROCKS. 



BIOMYX'A, Leid. A genus of Rhizo- 

 poda. 



B. vagans. Resembles the pseudo- 

 podia of a Gromia, separated from the body. 

 Fr. water. 



BIBL. Leidy, Proc. Phil. Acad. 1875, 

 (M. M. Jn. xiV. p. 88). 



BIS'PORA, Corda. A genus of Fig. 

 Torulacei (Coniomycetous Fungi), 60. 

 characterized by its uniseptate 

 spores forming; simple and solitary 

 bead-like chains at the apices of 

 short, slender, erect filaments, des- 

 titute of septa, arising from a creep- 

 ing mycelium. It was separated 

 from Torula by Corda on account 

 of the double character of the spores. 

 According to Fresenius, the chains 

 of spores are pedicellate as above 

 described, and the growth of the 

 chains appears to take place by 

 division of the terminal cell or spore. 



B. monilioides, Corda, of which 

 fig. 60 represents the chains of 

 spores without the pedicels, is Bri- ^PJ?* 

 tish (Torula auct.). On sticks. iHes. 



BIBL. Corda, Ic. Fung. vol. i. Magnified 

 pi. 2. fig. 143 ; Fresenius, Beitr. z. 200 diam, 

 Mycologie, Heft 2. p. 27, pi. 6. figs. 46-54 ; 

 Greville, t. 255. 



BITARTRATE OF POTASH. See 

 POTASH. 



BLASIA, Micheli. A genus of Pelliese 

 (Hepaticae). The British species, B. pu- 

 silla, L., occurs on moist heaths, not uncom- 

 monly in the mountainous parts of England, 

 Scotland, and Ireland. In addition to the 

 antheridia and pistillidia, and the sporanges 

 developed from the latter, this plant produces 

 gemma of two kinds. One kind is formed 

 in receptacles hollowed out of the nerve, 

 furnished with a long tubular beak, whence 

 the gemmae escape when mature. The se- 

 cond kind is described as black spherical 

 masses of granular or pulpy substance, and 

 occur within the epidermis on the under side 

 of the frond, often covered by the scales. 



BIBL. Hooker, Brit. Jtmgermannia t t. 



Fig. 61. 



* ] BLATTA. 



82-84 ; Eng. Bot. t. 1328; Brit. Fl. ii. part 

 1. 130; Sachs, Bot. p. 347. 



BLASTOT'RICHUM, Corda. A sup- 

 posed genus of Dematiei (Hyphomycetous 

 Fungi), of curious habit, growing in and out 

 of water upon aquatic plants. B. confer- 

 voides, Corda (fig. 61), forms felted tufts of 

 an agreeable rose- 

 colour upon living 

 and dead parts of 

 aquatic jEtiphor- 

 bice, in autumn. 

 The filaments are 

 very much branch- 

 ed, the branchlets 

 dichotomous and 

 subulate ; the 

 spores rose-colour- 

 ed, containing a 

 gelatinous nucleus 

 within. The spores 



are irregularly di- Blastotrichum confcrvoides. 

 vided; and Some Fragment of fertile filament. 



remain imperfect; Unified 200 diameters, 

 but both these and the perfectly septate 

 reproduce _ the plant when sown. The 

 ft. rin occurring above the surface of the 

 water is "of bloser habit than the submerged, 

 in which the filaments are longer and more 

 lax. 



Berkeley is of opinion that this plant is 

 only a state of some Dactylium, perhaps 

 D. (TRICHOTHECIUM) roseum. 



BIBL. Corda, Icones Fung. ii. p. 10 

 pi. fig. 50; Berkeley, Crypt. Bot. p 302. 



BLAT'TA. A genus of Orthopterous 

 Insects, of the family Blattidse. 



Blatta orienta'lis is the common house 

 blackbeetle or cockroach. The head and 

 the various organs of the mouth are figured 

 in PI. 33. fig. 1, the upper and front view ; 

 fig. 2 the under view; fig. 22 the parts of 

 the mouth separate. 



Head oval, and .concealed beneath the 

 large plate of the prothorax. Antenna 

 (fig. 1 a, broken off) very long, setaceous, 

 pubescent, and with very numerous joints; 

 they are inserted close to the inner margins 

 of the eyes ; basal joint stout and subovate, 

 second and third squarish, larger than any 

 of the following, which are ring-shaped 

 towards the base of the antennae, become 

 square (in the side view) at the middle, and 

 oblong at the apex. Labnim (fig. 1 e, fig. 22 

 lower part of a) exserted, entire, roundish, 

 truncated at the base. Mandibles (fig. 22 b) 

 short, stout, toothed at the tip and on the 

 inner margin; basal portion of the inner 



