ATLANTIC AND CARIBBEAN PYCNOGONIDA—HEDGPETH 2Q2()] 
wisest to discard both Phoxichilus and its unlovely anagram, Chilo- 
phorus, altogether, retaining in their stead the names that have been 
most consistently associated with these forms, at least in the past 
40 years, namely, Endeis, Pseudopallene, and Pallenopsis. 
As for Latreille’s species, while it cannot be assigned to his name 
as Bouvier tried to do by citing it as Phozichilus phalangioides 
Latreille (Bouvier), it appears to be a good species, although its 
general appearance suggests Pallenopsis denticulata Hedgpeth (1944) 
from Western Australia. Its origim is something of a mystery, 
however, as few members of the genus have been taken from shallow 
water, and natural-history dredging was practically unknown in 
Latreille’s day. Ifitisa North Atlantic form, it has yet to be retaken. 
No species of Pallenopsis has been found near the European coast, 
with the exception of P. tritonis Hoek, off the Irish coast, which is a 
deep-water form. 
The proposal to scrap Pallenidae (or Callipallenidae) in favor of 
Phoxichilidae, whatever the merits of the Phoxichilus-Pseudopallene- 
Pallenopsis controversy may be, is unnecessary and is not required 
by any rule of nomenclature. As Schenk and McMasters * remark, 
the selection of the first-named genus in a family for the genotype 
is unsound and has many disadvantages. In this case these dis- 
advantages are obvious: not only are we none too sure of the exact 
status of Latreille’s Phozichilus, but the family name Phoxichilidiidae 
Sars is so similar that confusion is mevitable unless the name is 
written ‘‘Phoxichilidae (Pallenidae)”’ as has been done by Calman 
(1914a) and Gordon (1932). 
That Pallenidae should be retained in favor of Callipallenidae 
(the type genus Pallene is a preoccupied name) is another matter; 
with Marcus (1940b) I agree that Pallenidae can be retained in spite 
of this change. It is the most appropriate name for a family in 
which so many generic names are some compound of the original 
Pallene: e. g., Parapallane, Pseudopallene, Austropallene, Pallenopsis. 
Fortunately the troublesome, ambiguous genera in this family need 
not concern us here; four genera are known from American waters, 
and they can be separated on the basis of the characters in the 
following key: 
1. Chelifores usually 2-jointed (sometimes 3-, but with oval trunk); not based 
on a conspicuous extension over proboscis; without rudimentary palpi__-__- 2 
Chelifores 2- or 3-jointed, based on an extension over proboscis; palpi present 
SS TUGUNeNUAGY KNODS2os ties! ee be aoe Pallenopsis (p. 209) 
2. Without auxiliary claws; legs often heavy and knobby; or, with large globular 
Chevacs Loti): ME Tay ek NS A CP Bae SA Sd Oak Oe 3 
Auxiliary claws present; legs not knobby; chelae small___-Callipallene (p. 202) 
* 18 Procedure in taxonomy, p.7. Stanford University, 1936. 
