63 
D/^metjen 
O 0.5 /.b 
G.S.C. 
Figure 7. Lilloettia liUoeiensis sp. nov. shown by a solid line; L. merionyarwoodi sp. nov. 
by a dotted line; and Buckmaniceras buckmani sp. nov. by a broken line; thick- 
ness of whorls of holotypes expressed as fractions of the diameter. 
Locality. Zone of Lilloettia lilloetensis, on Billhook creek at 3,100 feet 
altitude. 
Name. Of genus and species after Mr. S. S. Buckman, the great 
master of ammonitology. 
Family, virgatitidae 
Genus, Homolsomites nov. 
To be included in this family is the great series of forms of late Jurassic 
and early Cretaceous showing relationship to the planulates with virgatome 
ornament typified by Virgatites. The genus Homolsomites includes platy- 
cones with narrow umbilicus and narrow though rounded venter. Costse, 
delicate, branching according to various plans, but mostly virgatome, 
and crossing centre unbroken and with a strong forward bend. In maturity 
all but the ventral ornament become obsolete. Septum, strongly reclined. 
Stems of lobes narrower than is usual with this family. 
Name. Indian geographical — Homolsom. 
Homolsomites poecilochotomus sp. nov. 
Plate XXI, figures 1-4 
Ornament is striate up to early maturity. It branches according to 
several plans and combinations thereof, including dichotomous, bidicho- 
tomous, and virgatome (3-branch). The plans of branching become more 
