538 



PYCNOGONIDA 



ten species, East Indies and Australia) ; Pallene gruhii, Hoek 

 (Fhoxichilidium sp., Grube, 1869), is probably congeneric. 

 Palhnopsis, Wilson (1881): appendage I. 2 -jointed; appendage 

 II. rudimentary, 1-jointed ; appendage III. clawless ; auxiliary 

 claws present ; slender forms, including some formerly referred 

 to Phoxiehilidium ; about fifteen species, world-wide. Pallene 

 rlimorpha, Hoek, from Kerguelen, with 4-jointed palps, deserves 

 a new generic appellation. P. longiceps, Bohm, from Japan, with 

 rudimentary 2-jointed palps in the male, is also peculiar. 



Fam. 8. Phoxichilidiidae. — Appendage I. well -developed ; 

 II. absent ; III. present only in the male, having a few simple 



Fig. 



-Phoxichil iilium femoratum, Rathke, Britain. A, The animal with its legs 

 removed ; B, leg and chela. 



spines in a single row. The last character is conveniently 

 diagnostic, but nevertheless the Phoxichilidiidae come very near 

 to the Pallenidae, with which, according to Schimkewitsch and 

 others, they should be merged ; the two families resemble one 

 another in the single row of spines on the ovigerous legs and in the 

 extension of the cephalic segment over the base of the proboscis. 

 P/toa;tc/(i/ic^MM?i, M.-E. (1840): appendage III. 5 -jointed ; five 

 or six species (Mediterranean, North Atlantic, Arctic, Australia, 

 Japan). Anoplodactylus, Wilson (1878): appendage III. 

 6 -jointed ; auxiliary claws absent or very rudimentary ; about 

 twelve species, cosmopolitan, of which many were first 



