106 SUPPLEMENT TO THE CRAG MOLLUSCA. 
PECTEN SEPTEMRADIATUS, Chemn. Crag Moll., vol. u, p. 30, Tab. 4, fig. 2 (as Pecten 
Danicus). 
Locality. Red Crag, Sutton and Foxhall. 
This species was figured in the ‘Crag Mollusca’ from a Clyde bed specimen, and I 
mentioned (p. 31, note) that a worn specimen of my own from the Red Crag might belong 
to this species. Mr. A. Bell gives it from the Red Crag nodule pits at Foxhall ¢ Ann. and 
Mag. Nat. Hist.,, May, 1871). I therefore retain it as a fossil of the Hast Anglian 
Upper Tertiaries, but with doubt. I have adopted the above name in obedience to 
the rule of priority of nomenclature. 
Prcren WeEsTENDORPIANUS, Vysf. Crag Moll., vol. u, p. 323, Tab. XXXI, fig. 25 (as 
P. maxinus, var. larvatus), Supplement, ‘Tab. VIII, fig. 1. 
Locahties. Red Crag, Sutton and Waldringefield. 
In the ‘Crag Moll.’ at the above reference this was thought by me to be possibly a 
variety of the common recent British shell, P. maaimus, I having then only the flat valve, 
while M. Nyst’s work, in which MWestendorpianus is figured, showed only its convex 
valve (‘ Foss. Belg.’ pl. xvii, fig. 10). This did not justify me in referring my 
specimen to Nyst’s species, and I was unwilling, as mentioned at the time, to 
call it a new species. Since this, however, M. Nyst, in the ‘Bull. de J|’Acad. 
Roy. des Sc. de Belgique,’ has referred to my figure in the ‘Crag. Moll.,’ and observed 
that it represents the upper valve of his species Westendorpianus. I am, however, now 
able to introduce a figure of the lower or convex valve from a specimen which Mr. 
Canham has lately obtained from the nodule pits in the Red Crag at Waldringfield, 
which agrees with Nyst’s figure. ‘The rays are broader than those either of mazimus or 
Jacobus, and the depressions are deep and narrow, corresponding to the elevations of the 
flat valve (Tab. XX XI, fig. 25), which interlock when they are closed. Mr. Canham’s 
specimen of the lower valve is the only one known to me, and the one I figured as the 
flat valve is, I believe, also unique. 
Both of the specimens are probably derivative from some older Pliocene bed, though 
as yet no trace of the species has occurred in the Coralline Crag. 
