500 HABITS OF SPIDERS. 



dulations of the foot ; it has a peculiar habit of extending 

 the head, when a somewhat slender rounded peduncle, 

 resembling a neck, comes into view. By this means the 

 animal is enabled to move its head about in any 

 direction with ease and facility; the front part of the 

 foot is short and truncate, not elongated and dilated 

 in front, as in Sulla aplmtre and some others, and 

 behind it is furnished with two flattened lateral coni- 

 cal processes or tubercles, a peculiarity which I have 

 not observed in any other Sulla ; the lateral lobes ap- 

 pear to be entirely wanting, and the posterior lobe is 

 concealed within the shell, which, as in Sulla columna, is 

 altogether external. 



The forms of Arachnida are as wonderful and as varied 

 in Borneo as in other parts of the world, but their study 

 is exceedingly difficult, and their bodies not easily pre- 

 served. In the forests, you will often perceive large 

 species, suspended high by a single thread to the leaves 

 and branches of the trees, of fantastically-formed Acroso- 

 mata, with their flattened, painted backs, and strange 

 spiny protuberances. I discovered at Sarawak a very 

 beautiful new species, which I have named Acrosoma tri- 

 virgulata. It is in form very near Gasteracantha trans- 

 versa, gemmata, andfornicafa (Koch, Tab. 113, fig. 259, 

 260, and 261,) but it is black, with three broad, trans- 

 verse, yellow bands on the abdomen, with numerous faint 

 annuli, and three bright yellow spots on the posterior 

 part. The thighs are banded with yellowish-green, and 

 the under surface is black, with bright oval yellow spots. 

 Like many others, it was found suspended by a thread 



