94 Mr. P. W. Bassett-Smith on 



five or six times as long as head 

 and thorax ; anterior antennae 



6-jointed Clavella, Oken. 



b'". Only three pairs of limbs formed, 

 first biramose, second uniramose, 

 third stiimp-iike ; anterior an- 

 tennae 6-jointed Helleria, B.-S,* 



c'". All four pairs of limbs formed. 

 a*. Anterior antennae 3-jointed ; 

 first and second pairs of legs 

 biramose, third and fourth 

 stump-like ; genital segment 

 four times as long as head and 



thorax Pseudoclavella, g. n. 



J*. Anterior antennae 6-jointed ; all 



four pairs of legs biramose .... Cycnus, Edw. 

 c*. Anterior antennae 15-jointed ; 

 second, third, and fourth legs 

 biramose, 1-jointed, first uni- 

 ramose Nemesis, Roux. 



b" . Anterior antennae with hooked basal 

 joint ; posterior antennae short, with 

 three claws Eudactylina, Bened. 



Expressed diagramatically, thus : — 



Die HELE STHUNA . 



Anthosoma. 



Tucca. 



Norion. Epachthes. Lei'nanthrojnis. Dickelesthium. 



I I ..I 



Baculus. Lonchidium. Philichthys. 



Clavella. Hellei-ia. Pseudoclavella. Pseudocycnus. Cycnus. Nemesis. Eudactylina. 



Lamproglena. 



Donusa. 



* Ann. & Mag. Nat. Hist., Jan. 1898, p. 10. 



