320 OBSERVATIONS ON THE 
of repose. Their figure is somewhat conical, but 
compressed and truncated, so that the base and apex 
are elliptical with long transverse axes. Consisting 
of a single joimt only, each is connected with the 
other throughout its entire length, the extremity 
alone being densely covered with exceedingly minute 
papillz, which emit the viscous matter that is formed 
by the calamistra into the delicate tortuous bands 
constituting a portion of every flocculus in the snares 
of the larger Ciniflones, and chiefly imparting to them 
their most important property, that of adhesion (see 
Plate IT. fig. 1). 
A small conical hairy process resembling a mam- 
mula, on which, however, I cannot discern any papille, 
occurs at the base of the inferior spinners of various 
spiders belonging to different genera. 
MM. Lyonnet and Treviranus, with other skilful 
zootomists, have fallen into the error of mistaking the 
superior spinning-mammule of spiders, when triarti- 
culate and considerably elongated, for anal palpi 
(palpes de l’anus), denying that they perform the 
office of spinners, in consequence of their having 
failed to detect the papille from which the silk 
proceeds; and in this opinion they are followed 
by some arachnologists of the present day. I 
am inclined to attribute this singular oversight to 
the peculiar disposition and structure which the 
papille or spinning-tubes connected with the superior 
mammule, when greatly elongated, frequently ex- 
