62 
Lilloettia lilloetensis sp. nov. 
Plate XVIII, figures 1-4; Figure 7 
Body chamber of holotype seven-eighths whorl. 
Table showing number of ribs in a quadrant of whorl at various stages. 
Diameter 
27 mm. 6 primaries 16 secondaries 
55 “ primaries obsolete 17 “ 
70 “ 19 
85 “ complete smootlmess 
Dimensions. See graph under Buckmaniceras. 
Locality. Zone of Lilloettia lilloetensis, on Billhook creek at 3,100 feet 
altitude. 
Name. Of both genus and species Indian geographical name Lillooet. 
Lilloettia mertonyarwoodi sp. nov. 
Plate XIX, figures 1, 2; Figure 7 
Body chamber of holotype slightly more than two-thirds whorl. 
Table showing number of ribs in a quadrant of whorl at various stages. 
Diameter 
55 mm . 8 primaries 25 secondaries 
60 “ primaries obsolete 25 “ 
80 “ 
87 complete smoothness 
Dimensions. See graph under Buckmaniceras. 
Locality. Zone of Lilloettia lilloetensis, on Billhook creek at 3,100 feet 
altitude. 
Name. After my former teacher, Professor Merton Yarwood W il- 
liams. 
Genus, Buckmaniceras nov. 
Robust, rounded, sphaerocones with the ornament of Lilloettia, from 
vouth on. Differs from Lilloettia in a few important respects, such as a 
total lack of compression and in septal line. EL = L1, LI branches are 
short. 
Buckmaniceras buckmani sp. nov. 
Plate XX, figures 1-4; Figure 7 
Table showing number of ribs in a quadrant of whorl at various stages. 
Diameter 
23 mm. 6 primaries 16 secondaries 
55 “ primaries obsolete 17 “ 
90 “ complete smoothness 
