Gross morphology of the prosomal ganglion in B. granulatus . A: Surface renderings of the neurilemma (Nl; transparent) and the neuropil of the prosomal ganglion showing the general organization of the ganglion; note that space between neurilemma and neuropils is filled with somata (not shown); in lateral view. B: Surface renderings of the neurilemma (Nl) and the neuropil of the prosomal ganglion showing pedipalpal (Pnp) and leg neuropils (NpI-IV); in ventral view. C: Surface renderings of the neurilemma and the neuropil of the prosomal ganglion showing neuropils of the proto- (Ptc), deuto- (Dtc), and tritocerebrum (i.e. pedipalpal neuromere; Ppn); in anterior view. D: Surface renderings of the neurilemma, neuropils and cerebral vasculature of the prosomal ganglion giving an overview of the ganglionic vessels; in lateral view. Abbreviations: Ac, arcuate body; Cn, cheliceral nerve; Ca, coxal arteries; Dtc, deutocerebral neuropil; Nl, neurilemma; NpI-IV, leg neuropil I-IV; Pa, protocerebral artery; Pc, pedipalpocoxal arteries; Pnp, posterior neuropil; Ppn, pedipalpal neuropil; Ptc, protocerebral neuropil; Tga, transganglionic arteries.