XAUTILID^, 
151 
allied, to Temnoclieilus eoncavus, J. de C. Sow., sp. The periphery 
is very broad and slightly depressed in the centre, the angles rounded, 
the sides sloping outwards to the edge of the umbilicus, where they 
are acutely angular, and again sloping steeply to the point of con- 
tact with the preceding whorl. The whorls are about double as 
wide as high. A little below the border of the periphery there are 
three not very prominent and rather elongated nodes, with faint 
Tig. 25. 
Temnocheilus carhonarius. — a, perij)heral view of a ver)- imperfect specimen ; 
h, lateral view, showing three or four tubercles. Drawn from a specimen 
in the Collection. Natural size. 
indications of two more towards the aperture. There are obscure 
traces of lines of growth, which form a somewhat deep sinus upon 
the peripher}^ A faint ridge is seen along the median line of the 
periphery, and numerous fine longitudinal lines may be seen, with 
the aid of a lens, covering the whole of the surface of the cast. The 
septa and siphuncle are not preserved. 
Remarlcs. The present species is distinguished from Temnoclieilus 
eoncavus by the absence of the deep ventral furrow characteristic of 
the latter, and by the possession of a row of nodes along the peri- 
pheral border. 
Horizon. Coal-Measures. 
Locality. Coalbrookdale, Shropshire. 
Represented in the Collection by a single example. 
Temnoclieilus latus^ Meek and Worthen. 
18G5. Cf. Nautilus nodocorinatus, M^^Chesney, Illustrations Palaeozoic 
Fossils, pi. iii. f. 6 (5 by error, in explanation of plate). Not 
N. nodocarinatus of same author in text of same paper (I860), p. 6G, 
1870. Nautilus {Temnoclieilus) latus, Meek and Worthen, Proc. Acad. 
Nat. Sci. Philadelphia, p. 49. 
