98 NA1S. Class VI. 



3. DtGi- Gm. Lin. 3121. 452. 



tata. Shaw's Nat. Misc. tab. Turton Br. Faun. 137- 



[N. with single lateral bristles, but chiefly 

 distinguished by six retractile processes at the 

 end of the tail j length four lines. 



In stagnant waters towards the decline of 

 summer; rare. Ed. 



