AKURIDA. 445 



Plate I. 



Fig. 1. Anurida maritima, adult male viewed dorsally. 

 x 35. 



Fig. 2. A group of Anurida showing their general 

 appearance when alive. Nat. size. 



Fig. 3. Yentral aspect of adult female (shading 

 omitted). The ventral groove is seen as a 

 slightly sinuous line arising from a point in 

 the middle line of the head and passing mid- 

 way between the bases of the legs to terminate 

 on the anterior border of the ventral tube. 

 x 35. 



Fig. 4. Outline figure of the dorsal side of the head 

 showing the position of the sense organs. 

 x circa 50. 



Fig. 5. Right lateral oval protuberance of the head, 

 together with the five eyes of its side. The 

 post-antennal organ is seen immediately in 

 front. x 230. 



Fig. (5. A piece of the chitinous cuticle from the 

 abdomen showing the tubercles and some of 

 the large seta-like hairs. x 200. 



Fig. 7. Terminal joint of left antenna viewed from its 

 inner aspect. It shows the trilobed apical 

 sense organ together with patches of modified 

 cuticle, which are probably of a sensory 

 nature. x 180. 



Fig. 8. The apical sense-organ of the left antenna, 

 x 600. 



Fig. 9. Claw of left fore foot. x 420. 



Fig. 10. Right post-antennal organ, x 1,200. 



