24G SELECTED NOTES FROM 



Plant Crystals.— The outer coat of the bulb of Gladiolus 

 contains some good examples oi Long Crystal Prisms : these show 

 well with the polariscope. Leaves of Leiima trisiiica contain true 

 Raphides : some are found in cells ^nd some in intercellular 

 spaces. Large intercellular spaces may be seen in the centre of 

 these leaves containing air, which enables the leaves to float on 

 the top of the water. 



W. H. Hammond. 



Plant Crystals.— I think all preparations containing Plant 

 Crystals can be better shown without the polariscope by the 

 staining process. The air cavities are found in all water plants. 



C. BosE. 



Anguillula tritici belong to the class Entozoa, order 

 Nematoidea. 



H. F. Parsons. 



Trichina spiralis belong to the same order. " Measly pork " 

 is that infested by the tapeworm, called in this stage Cysticerci^ and 

 not by the Trichina. (See note in April part, p. 122.) 



H. L. Parsons. 



Lemna trisulca usually floats in the water, and not on the 

 surface^ as the other duck-weeds do. 



H. F. Parsons. 



Crystals, Iodide of Lead. — Prepared by mixing drop solutions 

 of acetate of lead and iodide of potassium, and allowing the 

 crystals to grow on the glass sflde. The mixing of various 

 chemical solutions, and watching the growth of the smallest 

 crystals on the stage of the microscope is very interesting, and 

 frequently beautiful objects for examination with the polariscope 

 are produced. 



R. S. Hudson. 



TJrticating Hairs of Caterpillars. — In reference to the hairs 

 of the larvae of Vapourer and Tiger moths, I was told when a boy 

 that such caterpillars stung. Possibly the spikey nature of the 

 hairs may produce irritation. Can anyone say ? 



W. LOCOCK. 



