508 PYCNOGONIDA 17 CHARS 
probably also take some part, as Hodgson suggests, in the act of 
feeding. 
In Pycnogonum, Phoxichilus, Phoxichilidium, and their im- 
mediate allies they are absent in the female; in ail the rest 
os | 
( 
A on 
Fra. 270.—Ovigerous legs of A, Phoxichilus spinosus, Mont. ; B, Phoxichilidium femor- 
atum, Rathke; C, Anoplodactylus petiolatus, Kr.; D, Colossendets proboscideus, 
Sab. 
they are alike present in both sexes, though often somewhat 
smaller in the female than in the male. They are always turned 
towards the lower side of the body, 
and in many cases even their point 
of origin is wholly ventral. The 
number of joints varies: in Phowi- 
chilidium five, Anoplodactylus six, 
Fic. 271.— Terminal joints of oviger- Phoxichilus seven ; in Paranymphon 
ous leg of Rhynchothorax medi- _- shou ra veins : itl 
fonraneee Cue: eight; in Pycnogonwm nine, with, 
in addition, a terminal claw; in the 
Ammotheidae from seven (7rygaeus) to ten, without a claw; 
in Pallenidae ten, with or without a claw; 
in Lhynchothorax, Colossendeis, Eurycide, 
Ascorhynchus, Nymphon, ten and a claw. 
The appendage, especially when long, is apt 
to be wound towards its extremity into a 
spiral, and its last four joints usually possess 
a peculiar armature. In Rhynchothorax this Fis. 272. — Nymphon 
; : brevirostre, Hodge. 
takes the form of a stout toothed tubercle Terminal joints of 
on each joint; in Colossendeis of several ovigerous leg, with 
y ; : i" 2 magnified “ tooth. 
rows of small imbricated denticles; in 
Nymphon and Pallene of a single row of curious serrate and 
pointed spines, each set in a little membranous socket. 
Legs.—The four pairs of ambulatory legs are composed, in 
all cases without exception, of eight joints if we exclude, or nine 
