404 Transactions of the Society. 



Megalotrocha spinosa was first discovered in China by Fleet- 

 Surgeon Gunson Thorpe (20), and has since been found in various 

 parts of the world, but not in England. 



Lacinulawia elliptica forms free-swimming colonies of elliptical 

 shape, the animals being fixed round a short, straight axis ; it was 

 first discovered in 1896 by Mr. John Shephard (16) in Victoria, 

 Australia ; two years ago I found some specimens in a gathering- 

 sent to me by Mr. E. H. Thomas from the Salisbury district in 

 Ehodesia. This species has not been recorded from any other 

 country so far. A closely allied species, also forming elliptical and 

 free-swimming colonies, but differing in some anatomical details of 

 the animals, L. racemovata of Gunson Thorpe, is known from 

 China. 



The remainder of the journey to the Zambesi through the 

 Wankie coal district was performed at night, so that there was no 

 further opportunity of collecting. Our train reached the Victoria 

 Falls station before daybreak, at about 5 o'clock in the morning of 

 September 12, and that and the following day were spent in ex- 

 ploring these wonderful Falls, about a mile and a quarter (or more 

 exactly 1936 yards) in width and about 350 to 400 feet deep, 

 and the extraordinary gorges which the water has excavated in the 

 basaltic rocks. At this time of year, towards the end of the dry 

 season, the water of the Zambesi was low, and we were enabled 

 to visit Livingstone Island, situated right on the edge of the Falls 

 and about midway between the two shores. 



Owing to the perfectly horizontal formation of the rocks in this 

 region the Zambesi above the Falls is a very broad, shallow, lake- 

 like river, dotted with wooded islands and without rapids or appre- 

 ciable current. After crossing the new railway bridge, 635 feet 

 long, which spans the gorge a few hundred yards below the Falls 

 and 400 feet above the water, we walked to a point about half-a- 

 mile above the cataract on the north side of the river and were 

 taken by natives in small boats to Livingstone Island, where Dr. 

 Livingstone landed just fifty years earlier and first saw the great 

 sight. This island is covered with trees, and at low water the rocks 

 of the river bed on the north side are exposed and form shallow 

 pools. From these pools I collected with my net and preserved 

 the material without a chance of looking at it on the spot. On 

 examination of the contents of the little bottle after my return 

 home I was glad to find it exceptionally rich in Eotifers, yielding 

 32 different species, as follows — 



Floscularia ? sp. A small contracted specimen. 



Megalotrocha spinosa Thorpe. 



Callidina ? sp. With two teeth in jaws. 



Synchceta oblonga Ehrbg. 



Triarthra longiseta „ 



