DEVONIAN FAUNAS. 335 
PLATYCERAS sp. undet. 
Plate XLIII., Figs. 5-7. 
At least two different species of Capulid shells which may be re- 
ferred to the genus Platyceras occur in the fauna of the “trilobite bed,” 
but they are represented by such a limited number of specimens, all 
of which are imperfect, that it is not possible to identify them with 
certainty. The larger species consists of about one volution, which 
expands with great rapidity, so that the maximum diameter of the 
aperture of the largest and most perfect specimen examined is about 
26 mm., while the depth of the shell, measured from the plane of the 
aperture, is only about 10 mm. 
The second species is a shell consisting of about two and a half 
closely-coiled, gradually-expanding volutions, the outer one of which 
is subangular along the periphery. The spire is not elevated above 
the outer volution, and the shell has the aspect of members of the 
genus Platyostoma, and it is possible that it should be referred to that 
genus rather than to Platyceras. The maximum diameter of the only 
specimen of this shell which has come under observation is 9.5 mm., 
the height of its aperture being 5 mm. 
LOXONEMA JERSEYENSIS N. sp. 
Plate XLIII., Figs. 8-10. 
Description.—Shell with an elevated spire, consisting of as many 
as fourteen volutions in the larger specimens. Apical angle, 23° 
to 26°. Volutions regularly convex, the sutures moderately im- 
pressed. Aperture subovate, higher than wide, the outer lip broadly 
sinuate, the greatest depth of the sinus being above the middle of the 
whorl. Surface marked by fine, transverse lines of growth, which 
follow the outline of the margin of the aperture. 
The dimensions of a large individual with the apical portion de- 
stroyed are: maximum diameter, 11.5; total length with apex re- 
stored, 34 mm. 
