EXPLANATION OF PLATE IL 



Fig. 7. — Eye (left), x 72 diameters. 



Fig. 8. — Antenna (left), x 36 diameters. 



Fig. 9. — Sucker (front view), x 36 diameters. 



Fig. 10. — Swimming-feet of adult female, showing the recurved 

 branches. Left half section of thorax, x 1 2 diameters. 



Fig. II. — Genital organs of male (left pair), situated on the third 

 and fourth swimming-feet, x 45 diameters. 



Fig. 12. — Tail-plate of adult female. The two black spots are the 

 receptaculi seminis. The papillae referred to in the text 

 lie between the receptaculi and appear as two spines 

 with their apices pointing towards the middle Une. 

 X 24 diameters. 



