Pomona College Journal op Entomology 



833 



runs in to tlic lower surliife of the leg. l'rol)aljly the more proximal part 

 of the nerve furnishes more nuiseiilar branehes while its more distal parts 

 from their position seem to contain a larger proportion of sensory fibers. 



The nerve trunk going to a palpus has a somewhat similar course as the 

 large ner\e in the leg, but the muscles are not so distinct. Here also the 

 main trunk is more deeply situated in the distal segments and runs ne.xt to 

 or very near the ehitin in the last .joints of the aiipendage. (Figure 262, B.) 



Aside from these eleven large trunks which supply the abdomen and 

 larger appendages, there are numerous small nerves between the others as 



Figure 261. Nervous System of Tarantula, X5 



A, from above: B. from the side, enlarged five times: O, ocular branches: C, cheliceral 

 branches: P, palpal trnnk. In A the darkest portion of the drawing indicates 

 the position of a part of the digestive tract. In B dark portion of the figtire 

 in the supra-sophageal portion, is a part of the digestive tract; a light area 

 above the ocular lobe is also a part of the digestive system. 



