558 Journal of Comparative Neurology and Psychology. 



pal. r. palatinus VII. 



pf. prefrontal bone. 



ph.JX. r. pharyngeus IX. 



ph.X.l. r. pharyngeus of the second branchial nerve. 



ph.X.2. r. pharyngeus of the third branchial nerve. 



pmx. premaxilla. 



pn. postnares (edge of wall). 



pplx. prosoplexus. 



prt.IX. r. pretrematicus IX. 



prt.X.i. r. pretrematicus of the second branchial nerve. 



prt.X.2. T. pretrematicus of the third branchial nerve. 



prt.X.^. branch of the r. intestino-accessorius X, representing a pretrematic ramus of a 



fourth branchial nerve. 



prt.X.4. a nerv-e associated with the preceding and representing a pretrematic ramus of 

 a fifth branchial ner\'e. 



psph. parasphenoid bone. 



pst.IX. r. post-trematicus IX. 



pst.X.i. I. post-trematicus of the second branchial nerve. 



pst.X.2. T. post-trematicus of the third branchial nerve. 



pi. m. ptervgoideus. 



ptc. pterygoid cartilage. 



pin. nerve innervating m. pterygoideus. 



pio. pterygoid bone. 



rexl. m. rectus externus. 



rinf. m. rectus inferior. 



rim. m. rectus internus. 



rs. m. rectus superior. 



rib. m. retractor bulbi. 



sar.1.2,^. mm. subarcuales recti i, 2 and 3, = constrictor arcuum branchiarum inferior. 



if. scapula. 



io. m. obliquus superior. 



se. saccus endolymphaticus. 



isp. first spinal nerve. 



Isp.d. ■ dorsal branch of first spinal nerve. 



Isp.rd. dorsal roots of first spinal ner^'e. 



Isp.rv. ventral roots of first spinal nerve. 



isp.v. ventral branch of first spinal ner\'e. 



2sp. second spinal nerv'e. 



^sp. third spinal nerve. 



sp.V. tractus spinalis trigemini. 



sp.VIII. tractus spinalis acusticus. 



sphc. m. sphincter colli and the ner\'e innervating it. 



spt. r. supratemporalis X. 



sq. squamosal bone. 



ssc. suprascapula. 



ithy. m. sternohyoideus. 



stp. stapes. 



th. thymus gland. 



ihr. thyroid gland. 



tin. m. temporalis. 



Una. anterior division of m. temporalis. 



tmn. branch of the r. mandibularis V innervating m. temporalis. 



tmp. posterior division of m. temporalis. 



tmpt. tendon of the posterior division of m. temporalis. 



ir. trachea. 



Ira. "tractus a" of Kingsbury. 



Irap. m. trapezius, posterior division. 



irapa. m. trapezius, anterior division. 



trh. "tractus b" of Kixgsbury. 



trc. tracheal cartilages. 



