Dr. Wyatt Wingrave—A New Variety of Ammonite. 197 
Hitherto the first variety only has been described as of English 
source. Last year, on following the eastward continuation of the 
Green Ammonite Beds to Golden Cap several fragments of Davai were 
found in the Red Band. One of these supplies a nearly complete 
specimen, which does not conform to either of the above varieties. 
It differs from 1 and 3 in several respects. The ribs are of finer 
texture, more numerous, never bifurcate, symmetrical in size and 
spacing, rectiradiate and showing no tendency whatever to a 
forward inclination, except the last few ribs near the aperture. In 
C. Davei the ribs are strongly prorsiradiate, unsymmetrical, and often 
bifurcate. The tubercles are much more numerous than in the 
orthodox Davez. They abruptly commence at the beginning of the 
penultimate whorl, and apparently adorn each rib as far as the inner- 
most whorls can be identified. In shape they are somewhat clavate, 
but not so prominent as in the ordinary Davav. 
In the photograph several of the ribs on the outer whorls appear 
to indicate a tendency to tuberculation or ‘ flaring’; this is due to 
unremoved matrix. The suture has not yet been exposed, although 
an area of an inch or more of test was removed from the outer whorl 
near its termination, showing that the body-chamber, like other forms 
of Davei, is evidently a long one occupying more than one whorl. 
The degree of involution is very slight, barely more than contact. 
Nearly the whole of the test is intact, and shows the characteristic 
russet colour of the matrix. (Plate VIII.) 
Suggested name.— Ceeloceras Dave, var. rectiradiatum (var. noy.). 
MorruotogicaL Drraits. 
Size.—Diameter 80 mm. 
Whorls.—Very slightly involute, polygyral (6), uncompressed, 
symmetrical increase in size and shape. 
#ibs.—Numerous, single (never bifurcated), rectiradiate, shallow, 
regular interspaced, uninterrupted at venter. 
Tubercles.—Numerous, small, clavate, on all the inner whorls, but 
outer whorl undecorated, non-septate. 
Umbilicus.— Shallow, open (concentrum- and latumbilicate). 
Venter.—Convex, cost uninterrupted. 
Suture.—N ot exposed. 
Distribution (source).—Red Band, Green Ammonite Beds, Lower 
Lias: Golden Cap, Dorset. 
STRATIGRAPHY. 
This specimen came from the ‘‘ Red Band ”’ of the Green Ammonite 
_ Beds, which at Golden Cap near Seatown forms its base, and is 
convenient of access from the beach. Below it is the well-marked 
‘“White Band”, each having its attendant beds of clay. Here the 
limestone Red Band is scarcely 1 foot in thickness and occurs as 
a single layer, but Mr. Lang is of the opinion that further west it is 
probably double owing to weathering influences.! These beds yield 
a fair supply of Ammonites, chiefly in fragments among the clays. 
1 Ww. D. Lang, ‘‘ Geology of Charmouth Cliffs’’: Proce. Geol. Assoc.; 
vol. xxv, pt. v, 1914. 
