XATJTILIDJE. 
159 
Nassau), &c. It is found also at Thalitter iu the Grand Duchy of 
Hesse, according to Sandberger, and Beyrich records it from Logan 
in Silesia. 
Horizon. Permian (Lower Zechstein). 
Localities. British. Sunderland, Humbleton, Durham. — Foreign. 
Trebnitz near Gera. 
TPIASSIC SPECIES. 
Temnocheilus Augusti^ Hojsisovics. 
1862. Temnocheilus Augusti, Mojsisovics, Die Cephalopoden der Medi- 
terranen Triasprovinz (Abhaudl. der k.-k. geol. Reichsaust. 
Band x.), p. 267, Taf. xc. if. 1, 2. 
Sp. Char. The whorls are as wide as high, and about one third 
of their width is covered by the succeeding whorl. The periphery 
is broad and flattened and bounded at its edges by the obtuse lateral 
angles ; the sides are slightly convex. The edge of the umbilicus is 
angular and its sides slope obliquely inwards. Nodes are developed 
both upon the angles bordering the periphery and also upon the 
edges of the umbilicus, and these two series of nodes are united in 
the young shell by narrow ribs ; but the latter disappear in the 
adult. The nodes are stronger in the adult than they are in the 
young stages of growth. The septa are approximate, the sutures 
forming a moderately deep sinus upon the sides of the shell, and a 
shallow one upon the periphery. No internal (dorsal) lobe can be 
seen. Siphuncle situated a little below the centre. The surface of 
the test appears to be perfectly smooth. 
liemarl's. The specimens in the Collection, which I have referred 
to this species, when taken together exhibit nearly all the characters 
of the species as given in Mojsisovics’ diagnosis. The dimensions 
of the largest specimen are as follows : — 
Greatest diameter of shell 5 inches. 
Greatest diameter of umbilicus 1| ,, 
Greatest height (ventro-dorsal) of the whorls 2|- „ 
Hoiizon. Muschelkalk. 
Locality. Unknown. 
Ptepresented in the Collection by two examples (nos. C. 3361-2). 
^ A small village in the Principality of Eeuss Gera, Southern Germany. 
