MEMOlliS OF THE NATIONAL ACADEMY OF yCIENCES. 



183 



Text-fig. 10.- 



-TIIE PORSAL AORTA, THE GENITAL AND GONADUCAL ARTERIES, AND THE ARTERY 

 OF THE PYRIFOHM SAC VIEWED FROAI THE DORSAL 8IDE. 



This figure and the one following are combinations of the result^ of my own dissections, and tlie figures of various 

 part,? of the vascular system jiuhlished by Willey. 



1, left artery of V.a.s per Hoevex's organ in the male; of ; 25, 



inferior labial lolje in tlie female. ' 26, 



2, superior mandibular artery. 27, 

 •S, right artery of Van der Hoeven's organ in the male; ! 28, 



of inferior labial lobe in the female. | 29, 



4, arteries to individual digital tentacles. 30, 



5, right tentacular artery. 31, 



6, arteries of eye. 32, 



7, infundibular artery. 33, 



8, pedal artery. 34, 



9, innominate artery. 3.5, 



10, artery entering po.sterior part of hood. 36, 



1 1 , right anterior columellar artery. 37, 



12, right anterior proventricular artery. 38, 



13, nuchal artery. 



14, crural artery. .39, 



15, marginal pallial artery. 40, 



16, right pallio-n\ichal artery. 41 , 



17, branch to dorsal body-wall. 42, 



18, right posterior columellar artery. 43, 



19, lesser aorta. 44, 



20, heart. 45, 



21, gonaducal artery. 46, 



22, branch to wall of gonad. ; 47, 



23, outline of genital duct. j 48, 



24, genital artery. | 



artery of right lobes of liver. 



outline of gonad. 



gastric artery. 



co;cal artery. 



artery to middle portion of liver. 



arteries to left lobes of liver. 



dorsal aorta. 



hepatic artery. 



posterior proventricular artery. 



hepatico-columellar artery. 



outline of pyriform sac. 



artery of pyriform sac. 



left posterior columellar artery. 



descending portion of columellar artery giving off 



branches to muscle, 

 left pallio-nuchal artery, 

 marginal pallial artery, 

 radial pallial artery, 

 artery to dorsal portion of mantle, 

 ilorsal aorta. 



left anterior proventricular artiTV. 

 cerebral artery. 

 Iiuccal artery. 



inferior mandibular artery, 

 labial arterv. 



