NOTES AND EXHIBITS. 117 



stroyed in making the tunnel. White Box {E. alhens) grew 

 immediately above the tunnel. To this the rootlets probably 

 belong, though a Kurrajong grew some further distance away. 

 The depth to which the rootlets descended was probably due to 

 their following clefts in the rock, which had been filled with 

 debris, and in which the phosphatic masses had developed. 



Mr. E. Cheel exhibited leaves of the common cultivated Grape- 

 vine ( Vitis vini/era L.) affected with a disease known as Erinosis, 

 caused by mites {Phytoptus vitis) which pierce and suck the young 

 cellular tissue and cause the so-called Erineum — hairlike develop- 

 ments of the epidermal cells. The specimens affected are from 

 Canley Vale and Campbelltown. He showed also the following 

 interesting series of Australian plants similarly affected with 

 mites, probably of the same genus or possibly Tetranychits or 

 some other closely allied mites. Eucalyptus saligna Sm ; Moona 

 Plains; A.R.Crawford; December, 1904. i^"'. sp.; Jellore Creek, 

 via Mittagong; E. Cheel; April, 1912. Dryayidra nivea R.Br.; 

 S. Perth, W.A.; A. G. Hamilton, 1902: Midland Junction, W.A.; 

 R. Helms; August, 1899: Swan Hill, Lowden, W.A.; Max Koch; 

 December, 1910. Dryattdra obtusa V\.^i\; Hopetown, W.A.; J. 

 H. Maiden; November, 1909. Banksia sp., probably B. rejyens; 

 West Australia; J. Staer; March, 1911. 



Mr. A. A. Hamilton showed, on behalf of Mr. J. H. Maiden, 

 F. L.S., Government Botanist, tubers of Mirahilis longi/io7-a h.; 

 and flowering- specimens of Eucfdyptus torquata Luehmann. Both 

 plants are growing in the Botanic Gardens, Sydney. Mr. Ham- 

 ilton showed also specimens of, and communicated notes on, 

 various plants from the National Herbarium, comprising Plan- 

 tayo lanceolata L., showing basal prolification of the inflorescence. 

 Examples collected by Mr. E. Cheel at Colo (January, 1912) 

 exhibit, in the earlier stage, arrested growth of the primary spike, 

 with resultant crowding of the flowers at its base. This con- 

 dition becomes accentuated as the growth increases, and lateral 

 spikes are seen to be in course of formation at the base of the 

 primary one. In a series of specimens from Hornsby (Coll. W. 

 F. l^lakely) similar conditions obtain, but are carried a stao-e 



