GLASGOW SOCIETY OF FIELD NATURALISTS. 37 



Mercurialis annua and Bras&ica Monensis. All from Troon, and, 

 with the exception of Carduus tenuifoUa, which is native, were all 

 found on the ballast heap. 



EXCURSIONS. 



Troon and Clock. — Bowling was the locality entered in the 

 syllabus for the excursion on the 6th September; but as it was 

 feared that at this season few objects of interest would be found 

 there, it was determined to substitute two excursions — one to 

 Troon and the other to Cloch. 



At Troon, in addition to the specimens above mentioned, an 

 abundant supply of the common shore animals was found. 



Mr. F. G. Binnie reported finding at Cloch fifteen different 

 species of land shells and one species of fresli-water shell, among 

 which were Zonites purus, var. margaritacea, Pupa Anglica, and 

 the \?ixibij pallida, and Helix fusca. Campanula hederacea and 

 Aspidium angulare were also found at this excursion, Mr. Cameron 

 mentioned having found the larvae of Heniichroa luridiventris at the 

 Cloch. 



PAPER READ. 



Gasteropoda. — Mr. John Harvie i-ead a paper on this class of the 

 Mollusca, in which he said that their present classification was 

 merely provisional, until their physiology and development had 

 been more thoroughly examined. He confined his remarks prin- 

 cipally to experiments and observations of his own on this class, 

 few of which demonstrated anything new ; but he had made them 

 for the purpose of satisfying himself that many of the statements 

 made with regard to the habits of the Gasteropoda were correct. 

 He described the structure of their shells, and exhibited prepared 

 specimens in illustration of his remarks. 



23rd September, 1873. 



Mr. Allan, Vice-President, in the chair. 



By Dr. Stirton. — A lichen found on Ben Yoirlich in July, 

 during the Society's excursion, which he had submitted to Dr. 

 Nylander, of Paris, who pronounced it new, and named it Lecidea 

 botryiza. It is distinguished by the clustering of the apothecia, 

 the dark hypothecium, and the conglutinate paraphyses with 



