PHYSIOLOGY OF THE INVERTEBRATE HEART. 



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EXPLANATION OF FIGURES. 

 PLATES IV-VIII. 



ABBREVIATIONS. 



A, anterior artery. 



AC, abdominal commissures. 

 A OS, aortic sinus. 

 A U, auricle. 



B, brain. 



-BG, branchial ganglion. 



CC, cerebral commissure. 



CG, cerebral ganglion. 



CPC, cerebro-pedal commissure. 



CPG, cerebro-pleural ganglion. 



CyC, cephalic vena cava. 



CVCO, cerebro-visceral commissure. 



G, gastric ganglion. 



GI, genital ganglion. 



GN, genital nerve. 



GV, gill ventricle. 



ff, heart. 



HG, hind gut. 



1C, intestino-visceral commissure. 



K, kidney. 



LA, lateral arteries. 



LN, lateral nerves. 



/. VG, left visceral ganglion. 



L VN, left visceral nerve. 



MNC, dorso-median nerve-cord. 



OC, cesophageal commissure. 



O, cesophageal opening. 



OER, cesophageal nerve-cord. 



OS, ostia. 



PA , posterior aorta. 



PAJIJ, posterior adductor muscle. 



PC, pedal cord. 



PCN, pericardial nerves. 



PG, pedal ganglion. 



PLG, plural ganglion. 



PIC, pleuro-intestinal commissure. 



PLC, pleuro-visceral cord. 



PN, pallial nerve. 



PVG, pleuro-visceral ganglion. 



PS, posterior sinus. 



R, rectum. 



RCN, recurrent nerve. 



R V, renal vein. 



R VG, right visceral ganglion. 



R VN, right visceral nerve. 



SA, sternal artery. 



SL, suspensory ligaments. 



SOG, supracesophageal ganglion. 



SG, subintestinal ganglion. 



SL/G, supraintestinal ganglion. 



SV, systemic ventricle. 



THG, thoracic ganglion. 



V, ventricle. 



VC, visceral commissure. 



VG, visceral ganglion. 



VN, visceral nerve. 



