EUCHLANIS. 



157 



rapidly as many others, and thus is more easily 

 examined : its rotatory organ is small, and divided 

 into four parts ; it has one eye, and the body is 

 so transparent that the internal parts are easily 

 seen, giving colour and seeming solidity to this 

 otherwise fragile-looking creature. The crested 

 and raised part of the lorica on the back, is very 

 curious, but the use of it is doubtful; other 

 genera have a lorica of similar construction. 



Euclilams triquetra is of large size and sin- 

 gular form, but is unfortunately rare, and only 

 found in turf-water. The lorica is very trans- 

 parent, and three-sided, the crest on the back, 

 and the rather sharp flattened sides, forming, 

 when seen endways, a perfect triangle t the tail 

 is divided into two sharp points, and proceeds 



