KOTES AND EXHIBITS. 415 



bacteria, which he had put up in the adjoining Laboratory. He 

 showed cultivations on various gelatinous nutritive substances, in 

 meat broth, and on boiled marine animals (fish, crustaceans). 

 Those on fishes (whiting, bream) especially, offer a most beautiful 

 aspect, and the light emitted by them is very intense. He also 

 demonstrated that ordinary sea- water can be rendered phosphor- 

 escent by adding to it cultures of the above micro-organisms. 

 There were three aquaria, two containing between 11 and 12 

 gallons each, and one 2^ gallons of sea-water. These quantities 

 of sea-water became highly phosphorescent by the addition of 

 mass-cultures of the luminous organisms, so as to resemble what 

 is known under the name of " milky sea." 



Mr. Masters exhibited for Mr. Prince a specimen of a very 

 beautiful Wood Moth of .an undescribed species of Pielus taken at 

 Lawson (Blue Mountains) a short time ago. The Insect is five 

 inches across the wings, the upper wings reddish-brown with 

 bright silver markings, the underwings deeply purple. Dr. Lucas 

 remarked that he had seen a specimen of this Insect from Gripps 

 land, Victoria. 



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