AMMONITID&. {il 
COROCERAS, Hyatt, 1877. The species all have numerous lobes 
and saddles, with smooth sutures, and a large exterior lobe which 
is very broad and prominent; they are plicately ribbed and very 
involute, the umbilicus nearly covered; mouth more or less 
hooded or constricted. C. ellipticus, Hauer (xxxvii, 8, 9). 
CuortsroceRAs, Hauer, 1875. 
Distr.—9 sp. Trias. C. Marshi, Hauer. 
Shell discoidal; body-chamber short; ribs interrupted by the 
convexity of the inner whorls, but continuous on the outer. 
HELICTITES, Mojs., 1879. Whorls with strong, uninterrupted 
ribs; lobular line undulated, with small, almost microscopic 
denticulations. C. geniculatus, Hauer. ‘ 
BADIOLITES, Mojs., 1879. Convexity of the whorls narrow and 
earinated ; ribs faleiform ; lobes not truncate, undulated, except 
the antisiphonal lobe, which is long and pointed. C.eryx,Munster. 
RHABDOCERAS, Hauer, 1860. 
Distr.—R. Suessii, Hauer. Alpine Triassic; Germany (xxxii, 
20, 21). 
Shell straight, orthoceratoid, strongly sculptured ; septa with 
rounded lobes. 
Rod-like, elongated forms with oblique annular sculpture and 
simple curved lobes; still very imperfectly known. 
Cocuioceras, Hauer, 1860. 
EHtym.—Cochlos, a snail-shell, ceras, a horn. 
Distr.—3 sp. Alpine Triassic; Hallstadt, Austria. C. Fisch- 
erii, Hauer (xxxii, 25, 26). 
Shell spirally elongated, scalariform, strongly sculptured ; 
sutures of septa with several simple rounded lobes. 
The whorls are spirally coiled to the left, with continuous ribs 
and simple curved lobes. 
Pinacocere. 
Body-chamber short, half or three-quarters of the last whorl; 
shell flattened, discoidal; sutural line very complex, with three 
groups of lobes adventive, principal and auxiliary). 
PinacocerAs, Mojs., 1873. 
Syn.—Megaphyllites and Carnites, Mojs., 1878. 
Distr.—12 sp. from the Triassic. P. Melternichii, Hauer, 
(xxxv, 71). 
Shell narrow, aperture high, smooth, seldom with knob-like 
enlargements on the surface. Body-chamber one-half to two- 
thirds of a whorl long; aperture with short lobular process of 
the convex portion. Attachment ring commencing a short dis- 
tance from the aperture and extending to the posterior end of 
