I 



TRANSACTIONS OF SECTION D. 783 



embryo, whicb, however, is destined to be consumed by tbe stronger ombryo which 

 is the oflspring of the ovum and the extr.aneous sexual cell derived from the pollen- 

 grain. 



The three antij)odes usually do not act as sexual cells, but they may perhaps 

 undergo a conjugation similar to that occurring between the two primordial cells 

 (^Sr.illa nutans). 



Criticism of the current assumption that the embryo-sac is a macrosjiore. 



Summary of facts in favour of the view, first advanced by the author, that the 

 embryo-sac is a sporocyte. 



13. Oti the Disappearance of Native Plants from their Local Habitats. 

 By Professor W. Hillhouse, M.A., F.L.8. 



The following list was compiled from various correspondents in continuation 

 of the Reports of the Committee formed for the purpose in 1 886. 



The list deals with the West of Scotland, and the materials were collected 

 mainly by a special sub-committee of the Natural History Society of Glasgow. 

 The numbering is that of the ' London Catalogue of British Plants,' edition 8. 



5. Thalictrum flavinn, I;. Formerly on the bank of the R. Clyde at Clyde 

 Iron Works, Lanarkshire; now extinct, from unknown cause (D. A.'B.). 



13. Banunciilus jiuitcms, Lam. In a small stream between Clydebank and 

 Dalmuir, Dumbartonshire ; extinct, through stream being used " for sewage 

 (L. W.). 



2-3. B. sceleratus, L. Marshy ground on side of R. Clyde between Clydebank 

 and Dalmuir, Dumbartonshire; extinct; marsh reclaimed (L. W.). 



39. Trollius ewojianis, L. Formerly, but scarce, on banks of Gourock Ruru. 

 West Kilbride, Ayrshire ; extinct (D. A. B.). 



59. Glaucium flarum, Crantz. Seashore between Dunoon and Toward, Argyll- 

 shire ; extinct, probably all gathered by collectors and summer residents (T. K.). 



89. Arctbis Turrita, L. Old quarry in wood near Partick, Lanarkshire 

 extinct since about 1880 (T. K.). 



107. Cochlearia officinalis, L. As No. 23 (L. W.). 



138. Senebiera Coronopus, Poir. Waste ground on seashore at Seamill. Avr- 

 sliire; extinct, washed away during a high tide, January 1884 (D. A. B.). 



249c. Lepif/07umi ^ler/lectmn, Kindb. As Nos. 23 and 107 (L. W.l. 



277. Malva moschata, L. Reported formerly to grow below Innellan, Argvll- 

 shire; now apparently extinct, from an unknown cause (T. Iv.). 



352. Trifulium stnatum, L. Sandy fields at SeamUl, Ayrshire ; extinct in 

 several places where formerly abundant, on ground now built over (D. A. B.), 



506. Bosa spinosissima, L. Among coarse grass on seashore, Seamill, Avr- 

 shire ; extinct in several spots where formerly abundant, washed away during a 

 high tide, January 1882 (D. A. B.). 



589. Peplis Portula, L. Quarry-hole iu field behind Tarbert Hill, A\'est 

 Kilbride, Ayrshire ; extinct ; site filled up by farmer (D. A. B.). 



672. Daucus Carofa, L. Waste ground, Seamill, Ayrshire; extinct; ground 

 now built over (D. A. B.). 



800. Cardials crispns, L. The same (D. A. B.). 



917. Andromeda Polijfolia, L. Stewarton Moss, Ayrshire; extinct; within 

 the last thirty years, from unknown cause (D. L.). 



— [Ledum palustre, L. Lecropt Moss, West Perth ; formerly in con- 

 siderable quantity, but almost extirpated by botanical class from Edinburgh 

 University, who were guided to the spot by a local botanist (J. Sli.).] 



941, Primula vuJf/aris, Iluds. Island of Cumbrae, Buteshire ; rapicfly 

 diminishing, being carried off" in basket loads by lady visitors (D. R.). 



993. Mertensia maritima, Don. Seashore between Dunoon and Toward, 

 Argyllshire ; extinct on all parts of the shore till far past Toward, being probably 

 all gathered by collectors and summer visitors (T. K.). 



lOOG. Echium vulgare, L. On sandy soil, IJog Farm, Stevenston, AjTshire: 

 extinct, being smothered by drifting sand (.1 .S.). 



