PLATE XITl. 



I'lc. ."il. — Cross soctioii of a cirrus of the HUi>prinr laliial '.'idU]! ni a Djalc ('. 1.. X 20. 



A, artery. 



CM, circular uuisclc layer. 



E, thickened epitlieliuiii (if the inner (.■'nctciriali surface nf th<> annular riilge. 



LM, nulially arrantjecl l(in<;itnilinal nuiscles. 



LM', outer layer of lon<!itnilinal muscles. 



N, nerve. 



OM, (ilih(|Ue nni.scle layer. 



RM. railiatins transvense nniscle fibres inside llie innji'dinj: iiortion of the anmilar ridsre. 



Til, traus\-er.se nuiscle libres surronndini.' the nerve and radiatini; outward 1h tweeii tlie loiiL'ituiliual mnselo? 



V, vein. 

 Fic. .i2. — Longitudinal section of tlie tip of the lirst cirrns of I hi' spadix. ( '. L. X .l-l. 



X, nerve. 



T!M, alternatini; layers of transverse nniscle lilires. 



V, vascular coriuni of the tip of the cirrns. 

 Kic. oil — Cro.ss section of the hrsi cirrus of tlie spadix. C. 1.. • 7. 



A, artery. 



N, nerve. 



V, \', veins, 

 Fk;. .")4. — (;ross .section of the fourth cirrus . f the spadix. C. L. X 14. 

 Fill. .">•'). — Lonjritndinal section of a fjland of the second cirrus of the sjiadix. C. L. X f'O, 



I'', eiiitheliuni of the dorsal surface of tlie cirrus, 



(i, secretory eiiitheliuni, 



li, lumen of triand, 



X, neck of yland. 



