538 PYCNOGONIDA LS CHAR 
ten species, Hast Indies and Austraha); Pallene grubii, Hoek 
(Phouxichilidium sp., Grube, 1869), is probably congeneric. 
Pallenopsis, Wilson (1881): appendage I. 2-jointed; appendage 
II. rudimentary, 1-jointed; appendage III. clawless; auxiliary 
claws present; slender forms, including some formerly referred 
to Phoxichilidium; about fifteen species, world-wide.  Pallene 
dimorpha, Hoek, from Kerguelen, with 4-jointed palps, deserves 
a new generic appellation. P. /ongiceps, 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 
A B 
Fic. 286.—Phoxichilidium 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. 
Phoxichilidium, 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 
