PROCEEDINGS OP THE SOCIETY. 303 



Mr. C. Sherry exhibited the Water Caltrops (Trapa natans, 

 Linn./ from Glasnevin Botanic Gardens. The curious four-horned 

 fruits of this species have been compared to the spiked iron 

 instruments called Caltrops, formerly employed in warfare to 

 impede the progress of cavalry. Mr. Sherry also showed Trapa 

 bicornis, Linn., the Ling of the Chinese, which is often sold in our 

 streets as a curiosity. The fruit in this species resembles a bull's 

 head. Mr. Sherry further exhibited Talisia guiaiiensis, Aubl., 

 which is interesting on account of its being the only one of the 

 eighteen species in the genus Talisia which has been introduced to 

 cultivation. 



Mr. G. F. Scott Elliot, M.A., B.Sc, F.L.S., F.KG.S., read a 

 paper entitled " Limits to the Range of Plant Species." (See 

 page 208.) 



