572 MOLLUSCA SUB-KINGDOM VI 
Scaphites, Park. (Figs. 1189, 1190); Discoscaphites, Meek ; Anascaphites, gen. nov. 
gen. Nov. 
Jahn. sp. 

Fic. 1189. 
Type A. (Scaph.) ventricosus, Meek sp.; Jahnnites, 
Type J. (Scaph.) Geinitzi, var. binodosus, 
Cretaceous. 
Family 9. Lytoceratidae. Neumayr (pars). 

Fic. 1190. Fic. 1191. 
Scaphites aequalis, Sowb. Lytoceras fimbriatum, Sowb. 
Scaphites spiniger, Schliiter. Upper Creta- Cenomanian; Rouen, sp. Middle Lias; Wiirtemberg. 
ceous (Senonian); Coesfeld, Westphalia. France. 1/}. Cross-section (cf. Fig. 1099). 
Includes only closely coiled, discoidal, and involute shells with somewhat prominent, 
often crenulated transverse bands of growth. 
ES 

Fia. 1192. 
Lytoceras Liebigi, Oppel sp. Tithonian ; Stramberg, 
Moravia. 
Antisiphonal lobe with two long internal 
branches bending inwards and attached 
to surfaces of the septa. Siphonal lobe 
short like that of Phylloceras, and 
siphonal saddles narrow. The first 
lateral saddles small and short, the first 
lateral lobes much longer than the 
ventral. Reduction of lobes along the 
line of involution is such that there are 
commonly only six to eight in full- 
grown shells. 
Lytoceras, Suess. (Thysanoceras, 

Fic. 1198. 
Alocolytoceras Germainei, @’Orb. 
sp. Upper Lias; Pinperdu, near 
Salins, Jura. 
Hyatt), (Figs. 1191, 1192). Jura and Cretaceous.  Alocolytoceras, gen. noy. (Fig. 
1193). Type A. (Amm.) Germainei, VOrb. sp.; Plewrolytoceras, gen. nov. Type P. 
(Amm.) hircinum, Schloth. sp. Jura. 
