48 The South Australian Naturalist. 



made in 1878, during the mayoralty of the late Mr. Henry Scott, 

 when about 4,000 were planted. From 1878 to 1884 inclusive, 

 49,000 trees were put in. From 1882 the planting had been 

 done extensively from the plans of the late Mr. J. Ednie Brown 

 (formerly Conservator of Forests), who had had a large prac- 

 tical voice in the early tree-planting operations of the city. For 

 several years after 1884 tree-planting was spasmodic, and some- 

 times even dormant. In 1898 the Adelaide City Council took 

 the matter in hand seriously, and during the past ten years 

 more than 10,000 trees and shrubs had been planted out from 

 the municipal nursery. There are about 80 varieties of native 

 trees on the park lands, the principal being Sheaoak, Silky Oak, 

 Lagunaria, Callitris (native pine), Acacia, Bottle Brush, Ster- 

 culia, Ficus, Queensland Nut, Flame Tree, Australian Red 

 Cedar, Stenocarpus (Wheel of Fire), Moreton Bay Chestnut, 

 Box, Kauri Pine, and Myrtle. The total area of Adelaide, in- 

 cluding parks, streets, and footways, is 3,700 acres. The area 

 of parks under the control of the corporation is 1,900 acres. In 

 addition, the corporation has 60 acres of gardens and 27 acres 

 of squares. The park lands are about a third of a mile wide. 

 The city, with its magnificent lungs, was laid out by Colonel 

 Light. The survey was started on January 11, 1837, at the 

 corner of North Terrace and West Terrace, and was finished on 

 March 10, 1837. Maxwell, in his book, ''A Tour in the Ophir 

 in 1901," says that Adelaide is certainly one of the most dainty 

 cities in Australia. 



Excursion, March 12, 1921. — A party of Field Naturalists 

 explored the beach south of Brighton Jetty. Few shells were 

 found, as there had been no rough weather lately. The leader 

 (Mr. W. J. Kimber) pointed out that nearly 1,000 species of 

 shells were found in South Australian waters, and there was 

 need for young collectors to take the place of older ones who 

 had done much for the science and would help beginners. 

 Specimens were found of Cephalopods (squids, cuttlefish, etc.), 

 Gasteropods (limpets, whelks, winkles, and so on), and Pelecy- 

 pods (cockles, oysters, mussels, etc.), characteristics of 

 each class were mentioned, also the various depths inhabited by 

 them. Members were interested to know that bivalve molluscs 

 help to purify sea water by taking from it for food much impure 

 matter. This is done by two siphons, one of which takes in 

 water which circulates through intestines which retain matter 

 as food; the water is then ejected through the upper siphon. 

 Mr. Nettleback, a keen entomologist, found on a bush on the 

 cliffs, the egg case of a mantis, and opened it, revealing its 

 structure so admirably arranged with a great number of eggs. 



