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 



Fig. 719 — Pycnogonum Uttoralc (Wilson). Explanations as in Fig. 721. Hg. 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. 



