^ 



^ip 



e. 



^'^ in ! ^' 



■s 

 ^- In r 



^^ ^^e tips of 



^ ^' '^^ probable II, 

 :ed by the 



- fructificatio 



a- 



n^i 



lilasne has hmi 



■ra and families 

 1 which is su 



I I 



io 



if fructification niaj 

 t different times. l\i 

 here are no less to 

 liform threads on 

 the larger stvio 

 yoies in the pj 

 )rmed in the j 





I 



id matter ^ji*' 



of those 



)mi 

 s bv ^^ 



'"' .;hich it >5 



P^'T\«nH(;not^P'! 



noiin^": 



s depen'il! 



.P feet 



in 









an 



APPENDIX D 



Ixxix 



the necklaces/ This question as to the extreme diversity 

 of the forms of fructification, which may be assumed by one 

 and the same plant under the influence of diverse conditions, 

 has been of late years much studied by the brothers Tulasne, 

 who have embodied their most important observations in 

 a magnificently illustrated quarto work entitled ^ Selecta 

 Fungorum Carpologia/ 



The lower Fungi belonging to the Myxogastric family, 

 which include forms closely allied to the Saprolegnia^ are 

 most interesting organisms, more than one half of whose 

 life-history is passed in an amoeboid condition. This con- 

 dition is so obvious, that De Barry has argued in favour of 

 the members of this family being regarded as animals rather 

 than as fungi. The spore cases of Ethalium septicum and 

 other Myxogasteres are formed by the union of certain large 

 sarcode or protoplasmic threads. The homogeneous internal 

 substance of this spore case then breaks up into a number 



low, however, fast is- J of distinct nucleated bodies, each of which, after they have 



been liberated in water, escapes from a delicate enclosing 

 membrane, ^ in the form of a cell, clothed only by a very 



thin primordial utricle, thus 



resembling 



the reproductive 



cells of many algae. These escaped cells undergo changes 

 of form, eventually exhibiting one or two cilia, and two or 

 three vacuoles, of which one at least pulsates. They have 

 also a motion of progression and rotation, as in the case of 

 ordinary zoospores \' They afterwards appear to develop 



During this period they lose their 

 cilia and their rotatory movements, and assume the creeping 

 ^ode of progression and ever-varying form of true ArncehcB^, 



^ 



and to attain a larger size. 



De Barry 



says : — * If, therefore, on the one hand, the develop- 



nfient of Amcedce from the products of the germination of the 



^ Quoted from abstract in * Journ. of Microsc. Science/ i860, p. 99. 

 ^^^^ condition they are frequently seen enclosing cells of algse and 

 ^ther articles of food, like ordinary Amoebae. 



