80 Ss. E. JOHNSON AND M. L. MASON 
Figs. 1, 2,3, and 4 Photograph of right (r) and left (1) dissections from four 
cadavers in the anatomical laboratory. In each dissection there are shown short 
stretches of spinal nerve and of sympathetic trunk with the associated rami com- 
municantes. C.8., eighth cervical spinal nerve; G., gray ramus communicans; 
Gn.crv.inf., inferior cervical ganglion; Gn.7.J., first thoracic sympathetic gan- 
glion; l., left; L.7., junction of eighth cervical and first thoracic spinal nerves 
to form lower primary trunk of brachial plexus; /., ramus communicans (mixed) 
which contains large proportions of both medullated and non-medullated fibers; 
r., right side; 7'’.J., first thoracic spinal nerve; Tr.sym., sympathetic trunk. 
Photograph blocked out, but not retouched. Reduced 1/4. 
