483 
parallel to the outlines of the apertures, but these last not infre- 
quently have shallow, broad constrictions and slightly projecting or 
trumpet-like lips in full-grown whorls. 
The specimens of Z: ammonuzs from the same locality may vary 
from very broad-whorled forms to those with much narrower almost 
cylindrical whorls, the former being slightly deeper umbilici and 
the latter being shallower, as in Z: cercularts. ‘The venter and 
sides are, however, almost invariably projecting and rounded, 
unless angulated by compression, whereas in cércudarts there is a 
distinct tendency towards truncation or flattening of the abdomen 
and sides. 
The sutures in the ephebic stage may be nearly straight, but there 
are in most specimens broad ventral lobes, saddles at the abdomi- 
nal angles, lateral lobes and saddles on the umbilical zones and 
lobes in the contact furrow. These inflections are, however, always 
- slight, and the sutures give the impression of being almost straight 
in most specimens. 
The contact furrow is distinct but not deep in the ephebic stage 
and continues to be present in the aperture of the whorl, which is 
never free. 
TTROCHOLITES INCONGRUUS, Ang. et Lindst. 
CLyM. INCONGRUA, Eichw. (Leth Rossica., Pl. 1, Fig. 7). 
CLYM. INCONGRUA, Schroder (Ceph. d. Untersil., Pal. Abh., Dames 
et Kayser, v, heft 4, Pl. ii, Fig. 2-4). 
TROCHOLITES INCONGRUUS, Ang. et Lindst. (4ragm. Sit., Pl. ix, 
Figs. 15-18). 
This species is beautifully figured by Angelin and Lindstrom and 
the living chamber and the lines of growth and sutures fully given. 
It is obviously a smaller species than Z. ammontius, with deeper um- 
bilical whorls much broader proportionately, abdomen very broad, 
but sides rounded as shown by Schréder. 
‘TROCHOLITES HOSPES. 
PALEONAUTILUS HOSPES, Remelé (Zettsch. deutsch. geol. Gesell, 
APM et wot, Flt, Pig. 1). 
TROCH. HOSPES, Schroder (Ceph. d. Untersil., Pal. Abh., Dames 
Gt Kayser, v, mett 4, Pl. i, Figs. 8,9). 
This species, supposed by Remele to be distinct generically from 
Trocholites, is merely, as shown by Schréder, a species of Trocho- 
