220 
THE ‘LINEAGE OF TRAGOPHYLLOCERAS 
LOSCOMBI (J. SOW.). 
A. E. TRUEMAN, B.Sc., 
University College, Nottingham. 
In a recent paper, F. L. Spath* has suggested that Trag- 
ophylloceras loscombi is descended from the continental form 
IT. numismale (Quenst.) the more primitive condition of the 




LTA 
Bois 77 CT Ne 
ele EES 
Fig. 1.—a.b. Shell at diam.7°3 mms. c.d. The same at diam. 12mms, 
e. The same at diam. ‘8 mms. f, At diam.‘55mms. g.h. Protoconch, x 42, 
latter being indicated by its wider umbilicus and the persistence. 
of constrictions until the shell attains a diameter of 20 mms. 
On the tunnel heaps at Old Dalby in North Leicestershire, 
there occur small specimens of TJ. loscombi similar to those 
described by Spath from Lyme Regis; associated with these 

* F. I.. Spath, ‘The Development of Trag. loscombi,’ Quart. Journal 
‘Geol. Soc., 1914, p. 336. 
Naturalist, 
