432 D. J. SCOURFFELD ON ILYOCRYPTUS AGILIS. 



/. longiremis, Sars. — Described from specimens raised from 

 Australian dried mud. Moult incomplete. Posterior marginal 

 setce with one accessory spine. Anus slightly anterior to middle 

 of post-abdomen. Median post-abdominal teeth, eight. Length 

 reaching almost ^y. 



Explanation of Plate XXII. 



Fig. 1. Ilyocryptus agilis,^, from the Victoria Regia Tank, 

 Royal Botanic Gardens, x 85, 

 ,, 2. Ilyocryptus agilis. Shell-sculpture, x 200. 

 „ 3. Ilyocryptus agilis, A single posterior marginal seta 



X 350. 

 J, 4. Ilyocryptus agilis. Post-abdomen. X 130. a. One of 

 the two anterior median teeth, as figured by Kurz. 



