BY G. I. PLAYFAIR. 145 



The usual size is considerably larger than this. These minute 

 specimens retain the characteristics of the species, which is quite 

 distinct. The cytoplasma is much more solid than in A. j)^'oteus 

 or A. verrucosa, and the shape always radiate. The contractile 

 vesicle is small, with a long systole, and sudden discharge. 

 (PI. viii., £.20). 



Var. STELLATA, n.var. (PI. viii., £.21). 



Forma pseudopodiis longissimis angustissimis fili£ormibus. 



Diam. corp. circ. 50, pseudopodia long, ad 150 /x. 



Lisraore (12). 



The pseudopodia are of clear ectosarc, very narrow, often quite 

 filiform, and always blunt at the ends. They are often more or 

 less stable, and are moved about bodily like the tentacles of 

 Hydra. 



Am.ceba proteus, Vampyrella lateritia, Paniphagus mtttabilis, 

 Clathrulina elega7is, C ochliopodiu7n bilimbosum, and Acantho- 

 cystis sp. were also found. 



EXPLANATION OP PLATES II.-VIIL 



Plate ii. 



(In figures of Volvox, the flagella have been omitted). 

 Fig.l. — Chlamydomonas (jlohulosa Perty; p. pyrenoid, gr. granule 



(x704). 

 Fig. 2. — Volvox aureus Elir., part of the wall of the ctenobium, 



showing connective filaments; p. pyrenoids (x528). 

 Fig. 3. — Volvox aureus, cell ; p. pyrenoid, gr. granule, st. stigma 



(xl056). 



Fig. 4. — one of the parthenogonidia (x704). 



Fig. 5.. — Volcox Bcniardit, n.sp. Family of eight caniobia (x235). 



Fig. 6. a younger ca^nobium (x528). 



Fig. 7. with crowded cells (x528). 



Fig. 8. one of the parthenogonidia of fig. 7 (x 



704). 



Pig. 9. a young coenobium, with few cells(x528). 



Fig. 10. with oogonia (x235). 



Fig. 11. one of the oogonia (xl0o6). 



Fig. 12. — Eudurina elegaiis var. I?ic/i7/io/idice, n.var., cell (x 880). 

 Flg.13. — Uva Caslno'ensls, n.gen. et. sp. (xl056). 



