INIDA 



; lucl ol the byssus-gland; b. the first embryonal leg; c. the second em- 



. ,/. tin- proboscis; r. the byssus-gland. 



— ii : Larva of the second stage, lateral view. 



rhe tliree foremost ambulatory legs. The otha letters as in the preceding figure 

 12: Larva of the second stage, lateral view. 

 An older phase than fig. 1 1. 



Cheliforus; b. the first embryonal leg; c. the second embryonal leg; d. the proboscis; e. the 

 I ambulatory 1 leg; '. the second ambulator) leg. 



Fig. 13 1 |. Nymphon spinosum Goods. 



Lai i the second stage, lateral \ iew. 



The larva is in a verj earlj phase of the second stage, still lying in the egg-shell, and 

 with the foremost pair of ambulatory legs onlj short and still unjointed 

 a. Cheliforus; <i'. duct of the byssus-gland; b. the first embryonal Leg; c. the second embryonal 

 ; d. the first ambulator) leg; e. byssus-gland;/ egg-shell. 



— 14: Larva of the third stage, from below. 



The embryonal legs and the byssus-threads have fallen off, but the articulation of the inia- 

 ginal fore limbs has begun. Of the fully developed ambulatory leys only one leg of the 



paii is kept. 

 a. a. The chelifori; b.b. the palps; .... the ovigerous leys. 



Fig- r 5 — ''i. Nymphon elegans Hans. 



Free larva of the first stage, lateral view. 



The beginning of the second stage is marked by the appearance of the byssus-threads. 



The letters as in fig. 13. 



— Id: Larva of the second Stage, lateral view. 



a. Cheliforus; d. duct of the byssus-gland; b. the first embryonal ley; c. the second embryonal 

 ley; </. the proboscis; ,'. the first ambulatory ley; /. the second and third ambulatory leg; 

 us-gland. 



Fig. 17 t8. Nymphon Sluiteri Hock. 



7: Larva of the second stage, lateral view. 



a. Cheliforus; l>. the first embryonal ley; c. the second embryonal leg; J. the proboscis; e. the 

 I ambulatory ley; /.the second ambulator) leg; ^.beginning of the third ambulator) ley. 



— 18: The same, from below. 



1 )f the ambulatory leys only the basal end is kept 



lifori b.b. the first pair of embryonal leys; ,.,. the second paii of embryonal 

 the pi. . the ganglionic mass for the embryonal legs;/ the ganglion of the 



fii ut of trunk; g. the whole ganglionic mass lor the rest of the trunk. 



Fig. n) -21. Nymphon longitarse Kx. 



■ va of the first i view. 



helii ri; ./.</. the duets of the byssus-glands ; b.b. the first pair of embryonal leys; 

 ■ of embryonal leys; <l.il. the byssus-glands. 



