362 Mr. W. Mitten on the Mosses and Hepatica of Sussex. 



ing themselves into their new sphere of being. As the sunlight 

 falls upon the cilia they are tinted with a most lovely violet 

 colour. 



The gemmule is circular in form, white, opake, and bears a 

 striking resemblance to a low-crowned hat. The margin is fringed 

 with cilia. There is an orifice beneath opening on the edge of 

 the disc, about which there are cilia, which play down into it. 



Occasionally a cup-shaped organ is protruded near this aper- 

 ture on which I have frequently observed a mass of fsecal matter. 



There is great difficulty in examining these beings with the 

 microscope, but I have been able to determine the above points 

 with tolerable certainty. 



The number of gemmules produced is immense. On a small 

 specimen, incrusting both sides of a piece of weed, which did not 

 exceed an inch and a quarter in length, and half an inch in 

 breadth at the widest part, about 120 ovaries were reckoned. 

 Each of these would contain about nine ova, so that more than 

 a thousand altogether would be liberated from this inconsiderable 

 fragment. 



EXPLANATION OF PLATE XIV. 



Fig. 1. The gemmule of Flustra hispida. 



— 2. The same, as it appears shortly after having become attached. 



— 3. A cluster of the cells of F. hispida in various stages of development. 



— 4. Cell and pol3'pe recently developed from the gemmule. 



— 5. Mimosella gracilis of the natural size — the cells folded together on 



the pinnae. 



— 6. A portion of a pinna magnified, showing the cells expanded. 



— 7. A single cell, with the circular orifice near the base. 



— 8. A cell just separated from the pinna. 



— 9. Pedicellina gracilis of Sars. 



— 10. Furrella producta. 



XXIX. — A List of all the Mosses and Hepaticce hitherto observed 

 in Sussex. By William Mitten, A.L.S. 



[Continued from p. 324.] 



Tribe IV. Funariace^. 

 Genus 1. Ephemerum, Hampe. 



118. E. serraium (Schreb.), Hampe. 

 Phascmn serratum, Schreb. Eng. Fl. 



Frequent in autumn and early spring. 



119. E. coheerens (Hedw.), Hampe j " dioicum j basi fills pro- 

 tothalli instructum, subacaule ; folia ovali-lanceolata serrata, 



