PL APE LTir. 



Pig. I.—Xaiicula undaia Mann. Enlarged 990 diameters. Doseription, p. 358, 



Fig. 2.—XavictfIa ardun Mann (valval view). Enlarged GOO diameters. Description, p. SaC. 



Fiu. 'i.—NavicHla ardua Mann (zonal view). Enlarged 000 diameters. Description, p, K^fi. 



Fig. A.~Navicnhiim>dig<t Mann. Eiilar^^ed 600 diameters. Description, j). 3,32. 



Fiu. ^i.—Savicula pinguU Mann. Enlarged 375 diameters. Description, p. 3i>0. 



Fig. G.^Navicfda invrnu.^ta Mann (type). Enlarged"37r> diameters. DejiLTiption, p. 346. 



Fig. 7,—XavicHla invcnudalshiun (form). Enlarged 375 diameters. Description, p. 346. 



44U 



