RESTORATIONS OF DEVONIAN CEPHALOPODS 465 
doubt are the aperture and the transverse section, which may have 
been somewhat elliptical or subcircular. 
Named in honor of Professor R. P. Whitfield, who, besides other 
well-known writings, has written several papers on the Wisconsin 
Devonian. 
Locality — Milwaukee Cement Quarry, Berthelet, Wis. 
Fic. 8.—A specimen of a gompho- Fic. 9.—Restoration of 
ceras which appears to be a new species, Gomphoceras whitfieldi N. S. 
but in which the characters are not In this restoration the cross- 
sufficiently well preserved for specific section is circular. It is, how- 
identification. ever, possible that the cross- 
section of the species was oval. 
Gomphoceras calvini, n. sp. 
(Figs. 4, 5, 6, 7) 
Description.—Shell large, fusiform. ‘Transverse section oval or circular. 
Tube regularly enlarging from near the apex to the greatest transverse diameter 
which is posterior to the chamber of habitation, at the third or fourth septum; 
thence contracting to the aperture, but hanging to one side in old age. 
Chamber of habitation large. Air-chambers irregular, varying in depth 
within 9°™ of the chamber of habitation, from 5 to 1o™™. Hyponomic sinus 
shallow and apparently on the concave side. 
