PYCNOGONIDA 



inglionic ma 



from below. 

 Here and in the following three figures onlj a small part of the ambulatory legshasbeen given. 

 il view. 

 ■ • I stage, from below. 



15: A young one, from below. 



Newl) begun ovigerous l< 



Fig. 16 17. Pallene brevirostris Johnst 



of the first stage, lateral view. 

 First pair of embryonal legs; b. second pair of embryonal legs; c. byssus-threads. 



— 17: The same, somewhat reduced, dorsal view. 



Th< !>•■ ssus-th reads from both the chelifori. 



Fig. 18 [9. Pallene hastata a. sp. 



18: Free larva of the second stage, lateral view. 



No trace of embryonal legs are seen lure, such as in Pall, brevirostris , but the development 

 is here somewhat more advanced, which may perhaps account for the difference. 

 The probosi 



— 19: Free larva of the second stage, lateral view. 



The larval stage is here more advanced, near its close. 

 rhi proboscis. 



Fig. 20 — 29. Nymphon grossipes Fabr. 



Larva of the second stage, lateral view. 



The ambulatory legs begin to appear, and a byssus-thread is secreted. 

 21: Larva of the second stage, lateral view. 

 The stage considerably more advanced. 

 22: The fore part of the same, more enlarged, 

 is-gland. 

 Larva of the second Stage, dorsal view. 



The two foremi rs of ambulatory legs are fully articulated with well developed claws 



■'. auxiliary claws, the second pair only want one joint. 

 The byssus-glands. 

 2 1: The same, from below. 



Tli' art of the two foremost pairs of ambulatory legs has been cut away. The 



to continue from the trunk into the ambulatory legs, bordered bj the 

 future wall of the stom; 



iuds; />./>. first pair of embryonal leg econd pair of embryonal legs, 



irt of the same, more enlarged. 



onal leg; A the second embryonal leg; c. the proboscis. 



'. view. 



ipment of the fourth pair of ambulator) legs is alreadj pretty well advanced. 



