178 PSEUDOCERATITES OF THE CRETACEOUS. 
NEOLOBITES Fischer. 
The sutures of this genus have, perhaps, simpler outlines than those 
of any other Cretaceous ammonoid, and have been supposed to place the 
genus somewhere near Tissotia. They, however, differ decisively from 
those of any of this group in having long phylliform saddles and a very 
peculiar ventral lobe. The form, ornamentation, and old age of the species 
from Tunisia, described by Peron, would place it in the genus Placenticeras, 
if no sutures were visible. But the sutures and ornamentation agree with 
those of Engonoceras, and show that it is probably a member of the same 
family. Choffat’s researches have placed this conclusion on a secure footing. 
His Neolobites vibrayeanus may not be identical with d’Orbigny’s species, 
but it is surely a close ally, and he gives the sutures in full, and these 
show the ventral lobes and siphonal saddles and first laterals to be similar 
to those of Engonoceras. If the young, when seen, prove to have a similar 
development, the evidence will be complete. 
NEOLOBITES VIBRAYEANUS (D’ORBIGNY). 
Ammonites vibrayeanus VOrbigny, 1840, Terr. Crét., pl. 96, figs. 1-3. 
Neolobites vibrayeanus Choftat, 1898, Faune Crét. du Portugal, Vol. I, 2d series, pl. 
5, figs. 2, 5 (not figs. 3, 4.) 
This species as figured by d’Orbigny has led to great confusion, owing 
perhaps to the absence of a sufficient representation of the details. Choffat 
has figured a species from Portugal which, if not identical, is probably 
similar to @’Orbigny’s species. All the characters coincide with the posi- 
tion here given to this form. A number of species are confused under this 
name, but the data given are not sufficient to separate them. 
Locality:. France and Portugal. 
Age: Cenomanian. 
NEOLOBITES CHOFFATI n. sp. Hyatt. 
Pl. XXV, figs. 1-4. 
Neolobites vibrayeanus Choftat, 1898, Faune Crét. du Portugal, Vol. I, 2d series, 
pl. 5, figs. 3, 4 (not figs. 2, 5.) 
This is obviously distinct from vibrayeanus, as is shown by the broad 
venter and distinct sutures as well as the more gibbous form. 
Locality: Portugal. 
Age: Cenomanian. 
