XXI GLANDS Sipe 
chilidiwm, in most Pallenidae, in nearly all Nymphonidae. Their 
presence or absence is often used as a generic character, helping 
to separate, e.g., Pallene from Pseudopallene and Pallenopsis, 
and Phoxichilidium from Anoplodactylus ; nevertheless they may 
often be detected in a rudimentary state when apparently absent. 
The legs are smooth or hirsute as the body may happen 
to be. 
Fie. 276.—Boreonymphon robustum, Bell. Male with young, slightly enlarged. 
Faeroe Channel. 
Glands.—In some or all of the appendages of the Pycnogonida 
may be found special glands with varying and sometimes obscure 
functions. The glands of the chelophores (Fig. 280, p. 522) are 
present in the larval stages only. They consist of a number of 
flask-shaped cells! lying within the basal joint of the appendage, 
and generally opening at the extremity of a long, conspicuous, 
often mobile, spine (e.g. Ammothea (Dohrn), Pallene, Tanystylum 
(Morgan), Nymphon brevicollum and N. gracile (Hoek)). They 
secrete a sticky thread, by means of which the larvae attach 
1 Meisenheimer (Zeitsch. wiss. Zool. \xxii., 1902, p. 235) compares these with 
certain glands described in Branchipus by Spangenberg and by Claus. 
