NArTILID^. 
143 
characters would fall into several of the ditferent sections.” He 
therefore concludes that Endolohus cannot be sustained. 
Fig. 23. 
Tc77inocheilus latim. — Lateral view of an imperfect specimen, showing on the 
left side several of the septa. Drawn from a specimen in the Collection. 
About one half natural size. 
One of the species referred by d’Orbigny to his genus CrTjptoceras 
(Eautilus suhtuherculatus, G. & F. Sandberger, Verstein. I^assau, 
p. 133, Taf. xii. ff. 3 a-e ; supposed by Kayser to belong to the 
genus Hercoceras, see cmte, p. 74), is included by Hyatt in the 
present group h Its ventral siphuncle led d’Orbigny to place it 
in C7'7j]7toceras^ but Nautilus doi'salis, PhiU., has always been 
taken as the type of that genus (see d’Orbigny, Prodr. de Paleont. 
Stratigr. 1849, vol. i. p. 114, not p. 58). 
Concerning the affinities of TeiJinocheilus, Mojsisovics ^ observes 
that it has a superficial resemblance to the genus Hercoce^'as, which 
has, however, a contracted aperture. Much closer allies, he con- 
tinues, are to be found in some species of Gyi'ocei'as (such as 6r. 
^ Proc. Boston Soc. Nat. Hist. 1883, vol. xxii. p. 283. 
2 Die Cephalopoden der Mediterranen Triasprovinz (Abhandl. der k.-k. Geol. 
Keichs. 1882, Band x.), p. 266. 
