46 IS Proceedings of the Roi/al Irish Academy. 



EXPLANATION OF PLATE I. 



Canthocamptits (Attheyellu T) p-raegeri, n. sp. 



Fig. 



1. Dorsal view, x 200. 



2. First antenna, x 650. 



3. Accessory branch of second antenna, x 1000. 

 4 First foot, x 650. 



5. Inner ramus of second foot, x 500. 



6. Last thoracic and first abdominal segments — dorsal view, x 350. 



7. Fifth foot, x 550. 



8. Last abdominal segments and furca — dorsal view, x 350. 



9. Spermatophore. x250. 



Ganthocamptus {Mesochra) hirticornis Scott. 

 10. Furca of sport ? x 350. 



