512 PYCNOGONIDA ‘CHAP. 
themselves to one another and to the ovigerous legs of the male 
parent. In Nymphon hamatum, Hoek, the several filaments 
secreted by the separate sacculi of the gland issue separately. 
In Pycnogonum the spime on which the gland opens is itself 
prolonged into a long fine filament, and here, according to 
Hoek, the gland is in all probability functionless and rudi- 
mentary. Hoek has failed to find the gland in <Ascorhynchus, 
and also in certain Nymphonidae (e.g. Boreonymphon robustum, 
Bell), in which the young are more than usually advanced at 
the time of hatching. The gland has also been described by 
Lendenfeld and others in Phoxichilidium, whose larvae do not 
cling together but live a parasitic life; in this genus the long 
spine or tubercle is absent on which the orifice is usually 
situated, and, according to Lendenfeld, the secretion issues 
from many small orifices set along the opposing edges of the 
chela. Of the two species described by Dohrn as Barana castelli 
and B. arenicola, the former has the spine of inordinate length, 
more than twice as long as the whole body, chelophore and all; 
while in the latter (which species rather resembles Ascorhynchus) 
the spine is altogether absent. 
In the palps.and ovigerous legs of the adult are found 
glandular bodies of a hollow vesicular form with a simple lining 
of cells, the vesicle being divided within by a septum with a 
central orifice, the outer and smaller half opening to the exterior. 
These glands are probably of general occurrence, but they have 
been but little investigated. They lie usually in the fonrth and 
fifth joints of the palp, and the third and fourth joints of the 
ovigerous leg. Hoek describes them in Discoarachne (Tanystylum) 
as lying within the elongated third joint of the palp, and opening 
by a sieve-plate at the end of the second joint. In Ammothea 
(Dohrn) and Ascorhynchus (Hoek) they open on a small tubercle 
situated on the fifth joint of the palp. In Nymphon, Hoek 
describes them as opening by a small pore on the fourth joint 
of the ovigerous leg. Dohrn failed to find them in Pycnogonum, 
but in Phowichilus, Phoxichilidium and Pallene he discovered 
the glands appertaining to the palps, though the palps them- 
selves have disappeared in those genera; he has found the glands 
also in Ammothea, in larvae that have not yet attained their fuil 
complement of legs. 
The males in nearly all cases are known to possess glands in 
