BOTRYLLUS. 



BOTRYTIS. 



of Tunicate Mollusca, of the family Bo- 

 try 11 i dae. 



Char. See BOTRYLLIDJE. 



Four species : B. Leachii, hyaline, pur- 

 plish, stars mottled white and yellow ; B. 

 albicans, transparent, stars white ; B. roti- 

 fera, yellowish, systems speckled with red ; 

 B. rubrum, intense orpiment-red. 



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

 and Hanley, Brit. Moll. i. 23. 



BOTRYL'LUS, Gaertn. A genus of 

 Tunicate Mollusca, of the family Botryl- 

 lidae. 



Char. See BOTRYLLIDJE. 



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

 stars numerous, individuals ten to twenty 

 or more, yellowish and reddish, common ; 

 B. poly cy dm, stars numerous, individuals 

 eight to twenty or more, bluish, general; 

 B. violaceus, B. smaragdus, B. bivittatus, 

 and B. gemmeus. 



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

 and Hanley, Brit. Mollusc, i. 19. 



BOTRYOCOC'CUS, Kiitzing. A genus 

 of floating Palmellese (Confervoid Algae), 

 forming lobed and irregular bodies enclosed 

 in a common, large, hyaline, membranous 

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

 ing a number of ovoid cells 1-7000 to 

 1-5000" in diameter, of a green or red 

 colour. 



B. Braunii. In lakes. 



BIBL. Kutzing, Sp. Alg. p. 892 ; Raben- 

 horst, Fl. Alg. iii. p. 42. 



BOTRYOCYSTIS,Kiitzing. Described 

 as a genus of Palmelleae 

 (Confervoid Algae) found 

 in stagnant fresh water, 

 but apparently forms re- 

 lated to Volvox. See VOL- 



Fig. 76. 



BIBL. Kiitzing, Sp. Alg. 

 p. 208; Tab. Phyc. pi. 9 

 and 10; Braun, Verjiln- 

 ffuna, &c. p. 170 (Ray 

 Soc. 1853). 



BOTRYOSPO'RIUM, 

 Corda (Stachylidium, 

 Fries). A genus of Mu- 

 cedines (Hyphomycetous 

 Fungi) allied to Botrytis, 

 but distinguished by the 



lateral position of the Spo- A fertile filament 



riferous branches (fig. 76). * ^" 



British species : Magnified 200 diain. 



B. diffusum, Corda 

 (Stachylidium diffusum, Fr., Botrytis dif- 

 fusa, Greville), forms loose white tufts,' a 



quarter of an inch high, on decaying her- 

 baceous plants, especially potatoes. 



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

 mealy patches on living or decaying herba- 

 ceous plants. 



BIBL. Corda in Sturm's Deutschl. Fl. iii. ; 

 Pi-achtfl. JEurop. Schimm. p. 39 ; Greville, 

 Sc. Crypt. Fl. t. 126. fig. 2 ; Currev, Qu. 

 J. Mic. Sc. v. p. 117. 



BOT'RYTIS, Mich. A genus of Muce- 

 dines (Hyphomycetous Fungi), among 

 which are found some of the commonest 

 moulds of decaying vegetable substances, 

 and some very important parasitic l\ir</i. 

 Corda separated the species with the fila- 

 ments continuous into a genus Peronospora 

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



. 77. 



Fig. 78. 



Botrytis (Peronospora). Botrytis. 



Magnified 200 diameters. Magnified 200 diameters. 



ments (fig. 78). Among the remaining 

 forms are distinguished species of varying 

 habit, separated by some authors under the 

 name of Polyactis and Haplaria. 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 head of PARASITIC 

 FUNGI. The following have been described 

 as British species : 



B. (Haplaria, Lk.) grisea, Fr. Fertile 

 filaments simple or forked, grey, slender, 

 rather rigid, septate, with little heaps of 

 globose grey spores at the apices and sides. 

 On decaying vegetables, usually on Spar- 

 ganium and allied plants. Corda, Ic. Fmui. 

 i. pi. 4. fig. 246. 



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

 ments gregarious, almost simple, cinereous, 

 soon strangulated, with white spores at- 

 tached hei e and there. Not uncommon on 

 stems of herbaceous plants. 



