690 Extracts from the Minute-Booh of the Linnean Society. 



any greasy substance offers itself on the surface of the sea, too large 

 to be readily swallowed, the Petrel with wings expanded runs back- 

 ward, until the whole is gorged or a fragment torn away." 



Dec. 18. Read the following "Notice of Cereus tetragonus." By Edward 

 Rudge, Esq., F.L.S. 



" This plant, which has been constantly kept in my hot-house up- 

 wards of twenty years, is a single stem between nine and ten feet in 

 height from the roots. The stem next the roots and for about a foot 

 from thence is solid and four-sided, about three inches in width, 

 with spines at its blunt angles ; at the height of between three and 

 four feet it becomes pentagonous, lobed at the angles, and within a 

 foot and a half of the top it is hexagonous. It first began to bloom 

 in the autumn of 1836, when it put out nineteen blossoms, open- 

 ing soon after sunset, and closing again soon after sunrise. In the 

 autumn of 1837 it produced eleven blossoms, and in 1838 thirteen 

 flowers, chiefly near the top of the plant, one or two only appearing 

 near the lower part, but all of them growing from the angles of the 

 lobes and stem. The colour of the petals is white, slightly tinged 

 with green at the base. The anthers are yellow." 



A sketch of the flower, of the natural size, accompanied the 

 notice. 



1839. 

 May 24. A Portrait of William Yarrell, Esq., F.L.S., painted by Mrs. Car- 

 penter, was presented to the Society by the under-mentioned Gentle- 

 men : viz. 



The Bishop of Norwich. 



R. Brown, Esq. 



E. Forster, Esq. 



— . Andrews, Esq. 



The Rev. J. Barlow. 



T. BeU, Esq. 



J. J. Bennett, Esq. 



— . Bentley, Esq. 



.1. E. Bicheno, Esq. 



J. S. Bowerbank, Esq. 

 Lord Braybrooke. 

 W. J. Broderip, Esq. 

 — . Carpenter, Esq. 

 J. G. Children, Esq. 

 The Earl of Derby. 

 G. T. Fox, Esq. 

 J. E. Gray, Esq. 

 J. H. Gumey, Esq. 



