VOL. LT.] PHILOSOPHICAL TRANSACTIONS. 253 



Scabiosa, Valeriana, Verbascum, and a great number of other genera; but the 

 delineations were omitted, as the appearances were nearly alike in all. 



Fig. J 4, The style and stigma of Leontodon Taraxacum: magnified 72 times. 

 — Fig. 15, Two hairs of the same, in which the perforation was distinguishable: 

 magnified 1280 times. — Fig. l6. The stigma and part of the style of Carduus 

 crispus: magnified 72 times. — Fig. 17? Two of the longer hairs of the same, in 

 which the canals or tubes, with their bifurcation, are shown, and the corpuscles 

 passing through them: magnified 1280 times. — Fig. 18, The stigma and part 

 of the style of Conyza squamosa: magnified 72 times. — Fig. IQ, A poi-tion of 

 the style of the same, with the corpuscles passing through its longitudinal ducts, 

 and the emptied grains of the pollen adhering to its sides, after having dropped 

 from the hairs of the stigma: magnified 859 times. — Fig. 20, A perfect grain of 

 the pollen of the same: magnified SSQ times. — Fig. 21, Part of the side of a 

 style of Solanum officinarum, with its hairs, and the continuation of their canals 

 through the body of the style: magnified 128 times. — Fig. 22, Part of the same, 

 in which the transverse communication between the canals is shown: magnified 

 384 times. — Fig. 23, A hair of the same, with a grain of pollen lodged within 

 the extremity of the tube: magnified 1280 times. — Fig. 24, Part of a hair of 

 the pappus that adheres to the rudiments of the seeds in Sonchus oleraceus, with 

 the corpuscles within them: magnified 1280 times. — Fig. 25, A leaf of Asple- 

 nium ruta muraria, with its seed vessels, which in this plant have no membrane 

 that covers them. — Fig. 26, The seed vessels of the same, with their elastic 

 rings: magnified 42 times. — Fig. 27, A seed vessel of the same, broken by com- 

 pression, with the seeds falling out: magnified 128 times. — Fig. 28, Seeds of the 

 same: magnified 859 times. — Fig. 29, A seed vessel of the same, in which the 

 parallel streaks on its exterior surface are shown: magnified 128 times. — Fig. 

 30, A small portion of the capsular part of the seed vessels of the same, on the 

 surface of which there appeared smaller streaks, which subdivided the parallel 

 ones shown in fig. 31 : magnified 859 times. — Fig. 31, A portion of the ring of 

 a seed vessel of the same: magnified 512 times. — Fig. 32, A smaller portion of 

 the same ring, in which was observed a plane side at the under part, where it 

 adhered to the capsule; on examining the broken part at the end, the ring ap- 

 peared to be solid. — Fig. 33, A membrane that covered the fructification of Po- 

 ly podium filix was separated from the leaf, and shown as it appeared on viewing 

 its under side with some of the seed vessels adhering to it; (a) is the broken part 

 where it had been joined to the leaf. — Fig. 34, Some of the seed vessels of the 

 same viewed separate: magnified 48 times. — Fig. 35, The peduncle of a seed 

 vessel of the same supporting the ring: magnified 1280 times. — Fig. 36, Part of 

 a leaf of Adiantum capillus veneris, showing the membrane which grows from 

 its margin, and which folds over it to cover the fructification, but had been un- 



