126 



tions. The lower disc is flat, and the upper disc con- 

 cave. The shell has minute spiral strioe. Aperture 

 large and of a rounded lunate form. Umbilicus deep. 

 Colour of the shell browish-olive. 



Large examples are an inch in diameter, by four and 

 a half lines thick. 



In a muddy brook at the foot of Beeston, into which 

 a constant supply of warm water is discharged, this 

 species grows to a large size, being an inch and a line 

 in diameter. 



The animal is nearly black. 



Locally abundant in canals, ditches, ponds, and gen- 

 tle streams, where there is plenty of mud and vegetable 

 decomposition. 



A white variety occurs near London, according to 

 Professor Forbes. 



The animal has the power of discharging a purple 

 fluid when irritated, 

 it is a species which will live and thrive in conBnement. 

 In the introduction of this work [page 5] it was 

 stated, as an illustration of the length of time which 

 Ibis species would keep alive out of water, that speci- 

 mens survived after being away from their native ele- 

 ment a month. Subsequently the same individuals 

 were placed on a wail, receiving the direct rays of a 

 summer sun for six consecutive weeks, and survived. 



M. Bouchard Chautereaux says they lay from 20 to 40 

 eggs at one time, which hatch in about 16 days. 



In this neighbourhood it is abundant in the several 

 localities where it is found. These are a brook at Len- 

 ton, another above Beeston Ryelands, a third at Bees- 

 ton, and the Musco-sic brook east of Beeston. 



Other recorded localities: — Weston Supermare 

 (Hincks), London (Grey), River Thames, Battersea 

 (Forbes), Essex (Sheppard), Norwich (Bridgman), 



