73 



Triophthalmus dorsualis* 

 Triphylus lacustris . 



. 11, W. 



. 5, R., W. ; 8, R., So., W. ; 

 11, P., W. 

 PLATYHELMINTHES. Trematoda. 

 Cercarian stage of a trematode worm 11, P. 



ANNELIDA. Oligoch^ta. 



^Eolosoma variegatum t . . . 8, P. 



= Attheyella spinosa 

 Canthocamptus pygmgeus 

 = Attheyella cryptorum 



12 



J 



* Triophthalmus dorsualis. Mr. Western remarks that this is undoubtedly 

 the rotifer figured and described by Gosse. The orange eye-spots on top of 

 front processes, mentioned by Eckstein, but not seen by H. and G., were 

 plainly visible. Of the three cervical e}*es described, the centre one only is 

 a true eye-spot, the two outer ones being chalky masses on the brain lobes. 

 The animal is therefore an Eosphora. Gosse's original drawing, with the 

 above exception, is excellent. 



Messrs. Rousselet and Western record from Hertford Heath an un- 

 described species belonging to the Notommatadse. 



t JEoloswna variegatum (Vejdovsky). Xew to England. 



