PROCEEDINGS OF THE SOCIETY. 303 
Mr. ©. Sherry exhibited the Water Caltrops (Z’rapa 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 guianensis, 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.LS., F.R.G.S., read a 
paper entitled “Limits to the Range of Plant Species.” (See 
page 208.) 

