BELEMNITES OF THE LIAS. 91 
that direction. In old specimens of B. vulgaris at Whitby, B. cylindricus at Staithes, 
and B. pazillosus at Ilminster, this is very obvious. ‘Thus, in a series of twenty-four speci- 
mens of B. cylindricus collected by myself near Staithes, about half are positively recurved, 
the rest slightly so or not at all. When the recurvation is very decided it is often accom- 
panied by ventro-planation. ‘Two specimens of B. elongatus from Cheltenham in my 
collection, which were presented to me by my friend the late H. E. Strickland, Esq., 
show this variation strongly ; it seems to be not at all an anomaly, but the usual structure. 
The recurvation, where regular, increases with age, and thus augments the tendency 
to bluntness which appears in many old specimens. 
The variation here alluded to under the title of recurvation is so far normal that it 
is always an upward curve. 
The one specimen on which B. ¢rifidus was quoted was from Upper Lias, Whitby. It 
is not distinct from B. tripartitus. Of B. brevirostris, D’Orb., quoted by Professor Morris 
from Cheltenham, I have seen no specimens. 
~ Lam aware that in the collections preserved at Whitby several interesting specimens 
occur to which Mr. Simpson has assigned names in his treatise on the Yorkshire Lias, 
and I have made drawings and careful observations of many of them; but the diffi- 
culty, to which reference has been made above, of deciding upon claims to specific dis- 
tinction from single, perhaps exceptional, specimens, deters me from doing more at present 
than expressing my hope that the diligent Curator of the Whitby Museum will persevere 
in the useful labour of amassing very many examples of the species which occur in each 
bed of the Lias which he knows so well. For thus, I believe, he will have just grounds 
for reducing the number of his specific names, and of augmenting the notices of variety 
under each form. ; 
One of these interesting fossils I must, however, mention expressly, as it occurs in the 
Marlstone of the coast very frequently, but seldom in so good a condition as to admit of 
sufficient definition. It is that called Belemnites inequalis by Mr. Simpson, belonging 
to the group of bisulcate Belemnites allied to B. apicicurvatus, pavillosus, &c.. It 
appears to be identical with specimens of 2B. pazillosus numismalis, of Quenstedt 
(‘Cephalop.,’ t. 23, fig. 21), which I have lately examined at Stutgardt. It is included in 
the Table, p. 94. 
Oppel, in his work entitled ‘Jura-Formation’ (1856—1859), mentions B. Whit- 
biensis, from the lower part of the Upper Lias. I am convinced this must be a synonym 
of B. vulgaris, one of the forms of Belemnites from this zone already named and de- 
scribed by Mr. Simpson in 1855. This zone is called by Mayer, Toarcian I, a—e. 
He also names a species from Bridport, as accompanying Ammonites torulosus in the 
lowest part of the Inferior Oolite, B. Dorsetensis. From inspection of the Munich Col- 
lection I infer this to be a synonym of B. guadricanaliculatus. The beds thus designated 
are included by Mayer among the Upper Lias beds, and called Toarcian IIT. 
Mayer, in his “‘ Systematic List of Jurassic Belemnites” (‘ Journal de Conchyliologie,’ 
