Structure of Flowers of Adoxa moschatellina. 259 



the alpine form of Bulimus lubricus and the Clausilia above-men- 

 tioned. 



Helix hispida, jS, (an Helix concinna, Ferr ?) 



rotundata, Mull, (radiata, Mont.) 



IV. The following species were plentiful in the first pine forests : 

 Helix villosa, Drap. 



pomatia, Lin. 



personata, Drap. 



obvoluta, Mull. 



Clausilia bidens, Dr. 



rugosa, Dr. 



perversa, Pfeiff. 



— solida, Drap. 



Bulimus montanus, Drap. 



(cionella) lubrica, Mull. 



In the lowlands of Berne the Testacea are those of the north of 

 Europe and Germany, but in the Vallais the conchology assumes a 

 more southern character. The trunks of the chestnut trees about 

 Sion are often covered with the Helix sylvatica, Drap. and under 

 stones we find Bulimus radiatus, Pupa quadridentata, and Pomatias 

 maculata. 



VI. — On the Structure of the Flowers of Adoxa moschatellina. By 

 the Rev. J. S. Henslow, M. A. Professor of Botany in the Uni- 

 versity of Cambridge. 



The flower of Adoxa moschatellina, as is well known, are ar- 

 ranged in ahead, and are so placed that one is terminal, and four others 

 lateral. They are composed of four whorls; but the number of the 

 parts in each is usually different in the terminal and in the lateral 

 flowers. In speaking of the subordinate parts of the two outer whorls 

 we shall consider them as sepals and petals, which cohere to form a 

 gamosepalous calyx and gamopetalous corolla. In this sense then, 

 the terminal flower more usually Fig. 1. 



contains 2 sepals, 4 petals, 8 sta- 

 mens, and a 4-celled ovarium, 

 which may be considered as com- 

 pounded of 4 carpels, while the 

 lateral flowers contain 3 sepals, 5 

 petals, 10 stamens, and 5 carpels 

 (Fig. 1.) Such is the ordinary 

 viewtakenof the structure of these flowers. They are, however, very 

 subject to vary in the number of their parts, and we propose to exa- 

 mine each whorl in detail. 



