BOTPtYLLUS. 



[ 116 ] 



BOTRYTIS. 



of Tunicate Mollusca, of the family Bo- 

 trvUidse. 



Cliar. See Botryllid^. 



Four species : B. Leacliii, hyaline, pur- 

 plish, stars mottled white and yellow ; B. 

 albicans, tran -parent, stars white; B. 7-oti- 

 feru, yellowish, systems speckled with red ; 

 B. rubrum, intense orpiment-red. 



BiBL. Gosse, Mar. ZooJ. ii. 34; Forbes 

 and Hanlev, Brit. Moll. i. 23. 



BOTRYL'LUS, Gaertu. — A genus of 

 Tunicate MoUusca, of the family Butryl- 

 lidfe. 



Char. See BoTRTLLiDiE, 



Six species : B. Scklosseri (PI. 18. fig. 20), 

 stars numerous, individuals ten to twenty 

 or more, yellowish and reddish, common ; 

 B. poli/ci/clus, stars numerous, individuals 

 eight to twenty or more, bluish, general ; 

 B. riolacens, B. smaragdus, B. bivittatus, 

 and B. gemmeus. 



BuBL. Gosse, Mar. Zool. ii. 34; Forbes 

 and Ilanlev, Brit. Mollusc, i. 19. 



BOTRYOCOC'OUS, Kiitzing.— A genus 

 of floating Palmelleas (Confervoid Alga3), 

 forming lobed and irregular bodies enclosed 

 in a common, large, hyaline, membranous 

 sac, about 1-24" in diameter, and contain- 



cells 

 a s'r( 



1- 



"000 to 

 or red 



Fitr. 76. 



ing a number of ovoid 

 1-5000" in diameter, of 

 colour. 



B. Braunii. In lakes. 



BiBL. Kiitzing, Sp. Alg. p. S92 ; Eaben- 

 horst, Fl. Ah/, iii. p. 42. 



BOTRYOCYS'TIS,Kiitzing.— Described 

 as a genus of Palmellese 

 (Confervoid Alg*) found 

 in stagnant fre.'^^h water, 

 but apparently forms re- 

 lated to Volvox. See Vol- 



YOClNEiE. 



BiBL. Kiitzing, Sp. Ah/. 

 p. 208; Tab. Phjc. pi." 9 

 and 10; Braun, Vcrjibi- 

 gmg, &c. p. 170 {Bag 

 iSoc. 18o3). 



BOTRYOSPO'RIUM, 

 C orda (St achy lid in m, 

 Tries). — A genus of Mu- 

 cedines (Ilyphomycetous 

 Fungi) aUit'd to Botrgtis, 

 but distinguished by the 

 lateral position of the spo- 

 riferous branches (fig. 70). 

 British species : 



Botrrosporiiim 



pulehrum. 



A fertile filament 



bearing fporiferoua 



lateral branches. 

 Magnified 2(J0 diam. 



B. ciijfusvm, Corda 

 (Stachglidium dtfftmnn, Fr., Botrgtis dif- 

 fusa, Greville), forms loose white tufts, a 



quarter of an inch high, on decaying her- 

 baceous plants, especially potatoes. 



B. pulehrum, Corda (tig. 70), forming 

 mealy patches on living or decaying herba- 

 ceous plants. 



BiBL. Corda in Stm-m's Deutschl. Fl. iii. ; 

 Prachtjl. Euro}}. ScJmnm. p. 39 ; Greville, 

 Sc. Cn/pt. Fl. t. 126. tig. 2; Currev, Qu. 

 J. Mic. Sc. V. p. 117. 



BOT'RY'TIS, Mich.— A genus of Muce- 

 dines (Ilyphomycetous Fungi), among 

 which are found some of the commonest 

 moulds of decaying vegetable substances, 

 and some veiy important parasitic fungi. 

 Corda separated the species with the fila- 

 ments continuous into a genus Peronosjwra 

 (fig. 77), from those with articulate fila- 



Fig. 77. 



Fig. 78. 



Botrytis (Peroncjspora). 

 Magnified iOO diameters. 



Botrytis. 

 Magnified 200 diameters. 



ments (fig. 78). Among the remaining 

 forms are distinguished species of varving 

 habit, separated b}* some authe)rs under the , 

 name of Polgactis and Ilapluria. The Po- 

 tato-fungus and the Muscardiue of silk- 

 worms are species of Botrytis, as described 

 below ; their natural history is further 

 treated of under the liead of PaeasitiC 

 FrNGi. The following have been described 

 as British species : — 



B. {Ilaplaria, Lk.) grisea, Fr. Fertile 

 filaments simple or forked, grey, slender, 

 rather rigid, septate, with little heaps of 

 globose grey spores at the api( es and sides. 

 On decaying vegetables, usually on S/)ar- 

 ganiwn and allied plant*. Corda, Ic. Futxf. 

 i. pi. 4. fig. 246. 



B. (Polgactis) cinerea, Pers. Fertile fila- 

 ments gregarious, almost simple, cinereous, 

 soon .'-trangulated, with white spures at- 

 taclied lieve and there. Not uncommon on 

 stems of herbaceous plants. 



