102 HIND : NEW CARBONIFEROUS NAUTILOIDS. 
Specific characters. — Shell compressed, globose, sub-circular, 
the whorls involute, the last almost completely hiding the pre- 
ceding ones, very gradually increasing in breadth and depth. 
The umbilicus is small and deep, and its shoulder bevelled in the 
older chambers and more so on the body chamber. The body 
chamber is incomplete in the specimen, but measures 77 mm. in 
length. It increases rapidly in breadth, and the umbilical 
shoulder becomes everted and promment. On its periphery are 
obscure transverse undulations. The aperture is 59 mm. from 
side to side, and 49 mm. in height, somewhat flattened at the 
central part of the periphery. The chambers are comparatively 
large, 10 in the last whorl. The sutures are described under 
generic characters, the characteristic sinuses and saddles become 
more marked in the older part of the shell. There is a flattening 
of the periphery to be seen in the whole of the last whorl ; the 
sides are gently convex. The cast of the interior shows a linear 
elevation in the centre of the periphery. 
Locality. — The roof of the Bullion Coal, Bumle}^ 
Observations. — This specimen unfortunately shows no details 
of the margin of the aperture or the first whorl. The angularity 
of the saddles of the suture line increases ^\'ith each whorl. 
APHELECERAS LATUM, SP. NOV. 
(Plate VIL, figs. 1, 2, 3.) 
This species is founded upon two examples of the chambered 
portion of the shell and commencement of the body chamber, 
and one small fragment of another individual. 
One specimen was given to me by Mr. J. Dunn, who procured 
it from the Comb or 4 Laws Limestone of Redesdale ; the others 
are in his possession, and one of them is much larger than the 
specimen I figure. 
Specific characters. — Shell large, evolute, with the aperture 
only just in contact with the preceding whorl ; rapidly increasing 
in diameter. Central vacuity large. The greatest thickness of 
each whorl is at the peripheral margin. Whorls in this specimen 
two and a half to the commencement of the body chamber 
inclusion none. 
