Sentence:  Myself, not bound by James' view/ Nor Walter's, in a vision saw these two/ Like trapped and weakening flies/ In toils of the same hoary net;/ I seemed to hear ancestral cries/ Buzzing ‘To our All-Wise, Omnivorous/ <WSD>Attercop</WSD> glowering over us,/ Whose table we have set/ With blood and bones and sweat.' 
Meaning of the word marked with <WSD> tags:  A spider.