EXPLANATION OF PLATES. 



PLATE I. INFUSORIES, figs. 1 6; POLYPS, figs. 7 12. 



Fig. 1. Vibrio lineola, p. 45, after EHRENBERG Infusions-thierchen, Tab. 

 v. fig. 4, (very highly magnified, nat. size gr^n line). 



Fig. 2. Amoeba diffluens, p. 46, after EHRENBERG, Tab. vm. fig. 12, 

 (magnified, nat. size ^ line). 



Fig. 3. Siderolina calcitrapoides, p. 49, magnified about 8 times, after a 

 specimen from Mont St Pierre. 



Fig. 4. Chlamidomonas pulvisculus, p. 51, after EHRENBERG, Tab. HI. 

 fig. x. B, (highly magnified, nat. size ^ line). 



Fig. 5. Kerona mytilus, p. 55, after EHRENBERG, Tab. XLI. fig. ix. 

 (magnified, nat. size line). 



Fig. 6. Vorticella nebulifera, p. 58, after EHRENBERG, Tab. xxv. fig. 1, 

 (magnified, nat. size of the bell -^ line). 



Fig. 7. Hydra grisea L., p. 73, from nature, nat. size ; a, a single polyp, 

 extended; 6, the like retracted; c, a polyp with two young buds 

 t,tt; the last still very incomplete. 



Fig. 8. Clava parasitica, Hydra multicornis, p. 75, after FORSK. Icon. 

 rer. natur. Tab. xxvi. fig. 6, B. 



Fig. 9. Coryne G^ERTN., Syncoryne ramosa EHRENB. p. 75, highly magni- 

 fied, after LOVEN, WIEGM. Archiv, 1837, Tab. vi. fig. 19 b, b bell- 

 shaped excrescences with eggs ; comp. p. 70. 



Fig. 10. Campanularia (gelatinosa), p. 76, in the embryonal state, 

 magnified; B, in a more developed condition, in which it is 

 about to quit the ovary; after VAN BENEDEN Mem. de FAcud. 

 de Brux. Tom. xvn. PI. 11. figs. 9, 18. 



Fig. 11. A, B, c, TuUpora musica L., p. 82, after FREYCINET Voyage de 

 VUranie, Zool PI. 88. A, development of a young polyp c; a, 

 empty tube, free of its polyp ; b, more developed polyp, opened 

 longitudinally d, e; B, iipper extremity of a polyp with the 8 

 tentacles and the mouth in the middle ; c, longitudinal section 

 of a tube ; here the animal is seen, and below it the eggs within 

 the tube, attached to long filaments. 



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VOL. I. 



