THE SECRETARY ON THE AFRICAN RHINOCEROS. 987 



belonging to the Sub-class Branchiopoda, was found in various 

 parts of the world, living in salt lakes and in the shallow 

 ponds in which sea-water is exposed to evaporation for the 

 manufacture of salt. It formerly occurred in England, but had 

 probably long been extinct in this country. An accidental 

 observation recently made at the Natural History Museum 

 showed, however, that it was a very easy matter to obtain a supply 

 of living specimens. " Tidman's Sea Salt," as sold in the shops, 

 frequently, if not always, contained living eggs of Artemia, and 

 an 8 % solution, allowed to stand for a few days, was found to 

 contain a swarm of nauplius larvae. The first attempt at rearing 

 these failed owing probably to lack of food-material in the water. 

 The juice of green leaves pounded in a mortar and strained 

 through mvTslin was found to be a suitable food, and the addition 

 of a few drops of this at intervals of about a week enabled the 

 specimens exhibited to be raised to maturity. All of them were 

 females, and swarms of larvfe of the second (parthenogenetic)' 

 generation had appeared. 



The Secretary remarked that on a recent visit to the Ostrich 

 Farm of Mr. Carl Hagenbeck at Stellingen, near Hamburg, he 

 had seen in the incubator fertile eggs of Struthio massaictcs from 

 German East Africa, aS'. australis from South Africa, and S. mo- 

 lyhdophanes from Somaliland, the eggs all having been laid at 

 Stellingen. A. Reichenow ('Die Vogel Afrikas,' vol. i. p. 7) had 

 already described and figured certain specific dififerences in the 

 number and arrangement of the pits on the eggs of these species. 

 He himself had been interested to notice that the eggs of the 

 Masai Ostrich were much larger than those of the others, more 

 spherical in shape, and very smooth and porcelanous in texture. 

 Those of the Cape Ostrich were somewhat similar in shape and 

 texture, but were much smaller; Mr. Hagenbeck had informed 

 him that a pair of the Masai Ostrich bred by himself and sent out 

 to the Cape were regarded by expert ostrich fai'mers there as 

 unusually large birds. The eggs of the Somali Ostrich were 

 larger than those of the Cape Ostrich, but smaller than those of 

 the Masai species, and were markedly oval in shape with a rougher, 

 less polished surface. 



The Secretary also remarked that on his recent visit to 

 Mr. Hagenbeck's Zoological Park at Stellingen, near Hamburg, he 

 had the pleasure of seeing a fine young pair of the common African 

 Rhinoceros, obtained from British East Africa, the exact locality 

 being unknown. The male closely resembled the ordinary figures 

 and mounted examples of the species, in that the skin appeared 

 to be smoothly stretched over the sides of the body, but the ears 

 were fringed with long tufts of hair. The female, on the other 

 hand, had no hair on the margin of the ears, and the general 

 external appearance was very different. At first sight it seemed 



