PLATE XVI. 



Fi<:. GO. — Cross seotion tln-iini:li the iiii<l(nc .if V:in licr lld^ven's oriwii. ('. L. X 8. 



I), (liirsal snrt'Mc-c. 



A, atrinin. 



(t, G, G, glanilulai' )ini'tiiiiis ui tlie orsjaii. 



Gn, ganglion. 



HF, horizontal fissure. 



L. Ia7nina-. 



N, nerves to the lamina'. 



Sll, wall of the atrinm. 



\'F, vertical fissure. 

 Fi(i. ()7. — Longitudinal section of a gland of Van iler Hiipven's organ. ('. L. X •'!•">. 

 Fui. ()8. — Cross section of gland tulmles of Van der Hivven's organ. ('. L. X ■>•>. 

 Flo. t>9. — Section of the mantle tln-ongli the liases of the preanal jiapill.-c. ('. I., v ]: 



G, (t, glands. 



IM, inner surface of mantle. 



G, opening of gland. 



GM, outer surface of mantle. 



F, P, l)a.ses of the preanal pajiilla-. 

 I'll.. 70. -Crass section of the salivary gland. ('. I,. ■• a). 



.\, artery. 



BS, hlood simis of salivary process. 



N, nerve. 



O, opening from the central cavity of the gland to ihe pharvntreal cavitv. 

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