ICN NIDA. 
34 PYCNOGONID 
essential reason for me to incorporate the two families has been the fact that Pa//enmopsis which is 
most closely related to the genus 2a//ene, shows, by the formation of its palps that it will not do to 
lay too much stress upon the presence or absence of these organs. 
I. Subfam. Nymphonini. 
Palpi expleti, pluries partiti. 
Palps well developed, with more joints. 
1.… Gen. Nymphon (Fabr. 1794). 
Nymphon, Wilson, Syn. Pycnog. New-Engl., 1878. 
Chætonymphon, Sars, Pygnog. bor. arct., 1888, pro parte. 
Boreonymphon, Sars, ibid. 
The genus Wymphon with the limits which have been given to it here by Wilson, includes 
a great number of species that might naturally be distributed to several groups, but the differences 
seem to me to be too small to justify the division into more genera, or the separating of more or 
fewer species of the genus Wymprhon of Wilson. The genera Crxætonymphon and Boreonymphon, 
for inst., which have been separated by Sars, l.c. p. 352 and 354, seem to me too little characteristic 
to be taken as more than groups of species, and with regard to AV. macronyx which has been referred 
to Chætonymphon, I think it even doubtful, if it might not more easily be placed among the species 
that Sars still keeps as the genus Wymphon. 
The species of the genus, brought home by the Ingolf, may be arranged as shown in the 
following analytical table. 
a. The trunk naked. 
(The fingers of the chelæ (i. e. both the immovable and the movable finger) dentate. 
The auxiliary claws well developed). 
b. The oculiferous tubercle pointed. 
I. N. grossipes Fabr. 
i 2. N. Sluiteri Hoek. 
b. b. The oculiferous tubercle truncate. 
c. The first tarsal joint shorter than the second. 
É N. brevitarse Kr. 
ec. c. The first tarsal joint as long, or longer than the second. ; 
d. The two last joints of the palps short and thick. 
(The claws short, powerful. 
The fingers of the chelæ short). 
N. serratum G. O. Sars. 
N. megalops G. O. Sars. 
nm 
6. N. Sarsii n. sp. 
d. d. The two last joints of the palps long, thin. 
e. The claws short, powerful. 
BEN. JEL0OekbrAssp: 
N. Stroemii Kr. 
