ORDER II AMMONOIDEA 569 
Tetragonites, Pseudophyllites, Kossmat; Gaudryceras, Grossouvre ; Protetragonites, 
gen. nov. Type P. (Amm.) quadri- 
sulcatus, @Orb. sp. Cretaceous. 
Family 3. Haploceratidae. 
Zittel. Mostly involute shells, 
smooth, or with constrictions and 
fold-like costae without tubercles 
that commonly follow the lines of 
growth across the rounded venter 
uninterruptedly. Spines some- 
times present as in preceding 
family. Sutures have blunt 
siphonal saddles, never pointed. 
First lateral lobes shallower than 
in Lytoceratidae, the first lateral 
saddles broader, and less deeply 
cut by marginals. Antisiphonal 
lobe long, straight, and trifid. 
Lateral zygous inflections more 
numerous, and there are often 
three or more zygous dorsal 
saddles. 
Haploceras, Zittel (Lissoceras, 
Bayle), (Fig. 1175). Jura and 
Cretaceous. Hurynoticeras, Cana- 
vari. Jura. Desmoceras, Zittel Fic. 1176, 
j m\ . AOA Desmoceras Mayorianum, dOrb. sp. Gault; Perte du Rhone 
(Buss i176, 1177); Puzosza, (after dOrbigny). 2 

Bayle; Cleonoceras, Paroni and 
Bon. ; Schlueteria, Hauericeras, Grossouvre. Cretaceous. 
e 
i 
; . ae f : Creniceras Renggeri, inflected — costa- 
aoe of Desmoceras latidorsatum, Mich. Gault; Perte ee pee SS roa tions, sometimes 
with two rows of 
tubercles on the sides, and a median ventral row that may fuse into a continuous 
solid keel. One line of ventral tubercles may also arise 
directly from folds that appear in otherwise unornamented 
shells. Aperture sometimes with long lateral lappets similar 
to those of Oppelidae. Sutures similar to Haploceratidae. 
Cadomoceras, Creniceras, Mun.-Chalm. (Fig. 1178); Cyrto- 
siceras, gen. nov. (Fig. 1179). Type C. (Amm.) macro- 
telus, Oppel sp.; Glochiceras, gen. noy. (Fig. 1106). Type G. 
(Amm.) nimbatum, Opp. sp. ; Phlycticeras (Lophoceras, Bonav.), 
Ochetoceras, Haug (Fig. 1180); Cymaceras, Quenst. (Hyatt). 
Type C. (Amim.) Guembeli, Opp. sp. Strigoceras, Quenst. (Buck- Fic. 1179. 
man); Streblites, gen. nov. (Fig. 1181). Type S. (Amm.) — Cyrtosiceras macrotelus, Oppel 
. ° sp. Tithonian; Stramberg 
pictus-costatus, Quenst. sp. Middle and Upper Jura. MO iiyit. » 
Family 4. 
Glochicera- 
tidae. Discoidal 
and involute 
shells, smooth in 
pri met tapes 
species, but ac- 


