HA RD 1VICKE' S SCIENCE- G OSSIP. 



149 



In Fig. Sg,J, the posterior extremity is represented, 

 and two large styles are seen. 



Cilia can be modified into — I, Flagella ; 2, -Re- 

 tracting filament ; 3, Sets or bristles ; 4, Styles ; 

 5, Uncini or hooks. 



than the anterior part and with a small hooked 

 process. From the anterior neck three or four cilia 

 sprung (Fig. S9, c). In one case also I saw a similar, 

 but not identical, organism attached near the posterior 

 end of a mature Stylonichia (Fig. 89, b). In the 





Fig. 89.— a, Stylonichia mytellus; b, S. mytellus with infusoria ; c, larval forms, perhaps o(S. mytellus 1 d, larval forms of Para- 

 mecium ? e, S. pustutata ; _/, nucleus of S. mytetlus, high power ; g, contractile space diastole, 6". mytellus ; h, contractile 

 space systole;/, posterior extremity, S. mytellus; cs, contractile space; ch, chlorophyll corpuscle; m, mouth; s, styles; 

 n, nucleus ; a, anterior ; /, posterior end. 



The flagellum and retracting filament have already 

 been described. Seta or bristles are strong straight 

 filaments which are movable, but do not vibrate. 

 Styles resemble them, but are thick with broad base. 

 Hoohs are curved, usually thick at the base, and 

 short. It is said that the styles in Stylonichia are 

 moved by the well-developed myophan layer. In 

 the interior there are food vacuoles and only one 

 contractile space. In the figure (Fig. 89, g h) the 

 vesicle is seen in systole and diastole, surrounded by 

 chlorophyll corpuscles. Once when examining this 

 organism I found a curious little infusorian, which I 

 thought might perhaps be a larval form. It was 

 composed of faintly granular protoplasm, the 

 posterior part of the body was devoid of cilia, broader 



illustration I have also figured what I take to be the 

 larval Paramecium figured by Balbiani in the account 

 he gave of conjugation in that organism. 



In the last article the following corrections should 

 be made : — retsie reproduction of Paramecium, instead 

 of " the young are described as acinctiform,"i read 

 "the young are described as acinetiform ;" n?[Spiro- 

 stomum ambiguum, instead of " the arms,(or anal area) 

 terminal," read " the anus- (or anal area) terminal." 

 (To be continued.) 



We strongly recommend our readers who have the 

 time not to miss an opportunity of visiting Mr. 

 William Bull's Grand Annual Orchid Show at"536 

 King's Road, Chelsea. 



