460 



ARACHNIDA 



TANYSTYLUM Miers. Mandibles 1-jointed and rudimentary; pedi- 

 palps 6-jointed; ovigerous legs 10-jointed and present in both sexes; 

 accessory claws present: 8 species. 



Fig. 720 



Tig. 719 Pycnogonum littorale (Wilson). Explanations as in Fig. 721. Fig. 720 

 Tanystylum obiculare (Wilson). Explanations as in Fig. 721. 



T. obiculare E. B. Wilson (Fig. 720). Length 1.5 mm.; spread of 

 legs 6.4 mm.; ovigerous legs about half as large in the female as in the 

 male : Vineyard Sound from low-water mark to 14 fathoms, on hydroids 

 or ascidians growing on wharves, etc. 



FAMILY 3. PALLENIDAE. 



Body rather stout; mandibles chelate; pedipalps wanting; accessory 

 claws wanting or not: 8 genera and 60 species. 



1. PALLENE Johnston. Mandibles 3-jointed; legs very long; oviger- 

 ous legs 9-jointed ; accessory claws present : 10 species. 



P. empusa E. B. Wilson. Length 1.5 mm.; spread of legs 13 

 mm. ; eyes red ; ovigerous legs about a third as long as the other legs in 

 the male, and smaller in the female : Long Island and Vineyard Sounds, 

 on hydroids in shallow water. 



2. ANOPLODACTYLUS E. B. Wilson. Body slender; rostrum rounded; 

 mandibles 3-jointed; ovigerous legs 6-jointed and wanting in female; 

 accessory claws absent: 12 species. 



A. lentus Wils. Length 7 mm.; spread of legs 30 mm.; eyes brown 

 or black; rostrum and mandibles long; ovigerous legs stout; legs very 

 long; color purple, sometimes gray or brown: common between tide marks 

 and in shallow water in Vineyard Sound, on hydroids and ascidians. 



FAMILY 4. NYMPHONIDAE. 



Body slender or broad, with a large tapering rostrum; mandibles 

 chelate; pedipalps present: 4 genera; 55 species. 



