475 
involution and broad lateral lobes, and the invariable ventral lobe 
of Schroederoceras is replaced by a saddle or nearly straight suture. 
The type of this genus, when it was first described, were the 
specimens in Geological Museum at Ottawa identified as Vawtilus 
versutus of Billings, but these appear here as Litoceras Whiteavst, 
since there is every reason for supposing that they are not the 
species described by Billings under the name of ‘versutus. 
LITOCERAS WHITEAVSI. 
NauUT. VERSUTUM (?) (pars), Bill. (Geol. Can., Pal. Foss., i, p. 
258). 
Loc., Point Rich and Gargamelle Cove, Newfoundland. 
Having examined the so-called originals of this species, so far as 
they exist in the Geological Survey Museum at Ottawa, I have 
found that none of them came from Billings’ locality, Bonne Bay, 
and none of them agree with Billings’ description. Billings’ 
species had ten septa to the inch; this species has the sutures about 
one-quarter of an inch apart, a difference showing essential dis- 
tinction. 
The young on the second whorl has the siphuncle ventrocentren 
and are slightly costated. These cost disappear before the end 
of this whorl and the surface is marked only by the lines of growth. 
The siphuncle also shifts gradually, becoming centrodorsan, but 
in the adult it does not approximate to the dorsum, remaining 
nearer the centre than the dorsum. The abdomen is very broad in 
the later stages, and in the adult the diameter through the abdomi- 
nal angles is longer than the ventro-dorsal diameter. 
The sides are divergent; that is, slope inwardly. They are 
rounded and have no umbilical shoulders, the dorsum being coex- 
tensive with the contact furrow which covers the abdomen com- 
pletely. The sutures are sinuous, having well-marked ventral 
saddles, lateral lobes and probably dorsal lobes, although the latter 
were not seen. The specimens from which this description was 
taken were collected at Gargamelle Cove, near Billings’ locality, 
and probably belong to this species, as it is identified by the Geo- 
logical Survey of Canada. The form of the whorl is not so broad 
laterally, the chamber of habitation is less than one-half of a volu- 
tion in length and smaller in every way than in Litoceras insolens. 
A section of the whorl is more like that of zzsolens in the ephe- 
