M. Miiller on the Germination of Isoetes lacustris. 181 



familiar, more especially those which are of low or moderate 

 elevation. Around Blueficlds and along the neighbouring shore 

 it is particularly numerous at all seasons. It flies low, alighting 

 but little, proceeding with a dancing or jerking motion over the 

 herbage, with no great rapidity, so that it becomes an easy booty 

 to the entomologist. 



33. Nica Cadma. I took this once in April, in a pasture be- 

 hind Bluefields, and two or perhaps three times, on the Hamp- 

 stead lload in June and July. When in good condition the 

 purple flush upon the red of the posterior wings is very rich and 

 beautiful. 



34. Eubagis Zetes. In the month of June I first met with 

 this little butterfly about midway between Bluefields and Savanna 

 le mer ; two or three specimens then occurred, not exactly asso- 

 ciated, and yet not far from each other. They were playing 

 about some shrubs by the road-side and were easily caught. A 

 few others occurred in July, after which I saw it no more. I 

 think on all occasions that I met with the species, which were 

 but few, I found several at no great distance from each other. 

 It seems a lowland specie ', and limited in the season of its acti- 

 vity to the middle of summer. 



[To be continued.] 



XX. — An Account of the Germination of Isoetes lacustris. 

 By Karl Muller*. 



[With two Plates.] 

 [Continued from p. 93.] 



5. From the epoch when the Germ-plant breaks through to the 

 formation of the second Leaflet. 



In the germinal body (Keimkorper) may be distinguished : 1, the 

 reservoir for nutrient matter mentioned in foregoing paragraphs. 

 To facilitate the descriptions I will call this the alimentary organ 

 {Nahrungsspeicher) ; 2, the matrix of the root ; 3, the vagina ; 

 4, the scale of the first leaf, 5, the cell of the second leaf or to 

 describe it in more general terms, the point of gemmation for 

 all the following leaves ; 6, the first leaf I shall have to con- 

 sider these in a somewhat different order, in accordance with the 

 development of the plant. 



1. The Alimentary Organ. — This part of the germinal body 



* Translated by Arthur Henfrey, F.L.S., from the Botanische Zcitung, 

 April28, 1848. 



