1 86 



PATTEN AND REDENBAUGH. 



tn.p.e. 



n.o. 



o.a. 



oc.r. 



oe. 



ol.or. 



P- 



p.e.n. 



p.i.n. 



p.n. 

 p.o.c.^ 



p.pr. 



proc. 

 pros. 



prov, 



p.s. 



meso - plastral -entapophy- 



sial muscle, 

 nephridia. 

 neural nerves, 

 nephridial opening, 

 occluder ani (muscle), 

 occipital ring, 

 oesophagus, 

 olfactory organ, 

 ostia of heart, 

 pericardium. 



posterior ento-coxal nerve, 

 posterior intestinal 



branch, 

 pericardial nerve, 

 post-oral commissures, 

 posterior process of endo- 



cranium. 

 proctodaeum. 

 prosoma or cephalotho- 



rax. 

 proventriculus. 

 pericardial sinus. 



s.v. 

 tel. 



6-9 



r.ol.n. right olfactory nerve. 



r.os. rudimentary ostia. 



s.a. sphincter ani (muscle). 



s.a.ar. superior abdominal artery. 



s.c.n. segmental cardiac nerve. 



st.71. stomodaeal nerve. 



semilunar valves. 



telson. 



t.e.fn.^ and b extensor muscles of tel- 

 son. 



flexor muscles of telson. 



tergo-pro pi astral muscles. 



tendinous stigmata. 



ventral artery. 



ventral cord. 



venous collecting sinus. 



veno-pericardiac muscles. 



X. root of supposed cardiac 



nerve of fifth neuro- 



mere. 



7. four tergo-coxal muscles 



of chelicerae. 

 7a and 7c muscles of chilaria. 



t.f.m. 

 tp.m.3.-c 



v.ar. 

 v.c. 

 v.c.s. 

 v.p.my^^ 



