36 
and Euomphalus together, the conical part of this shell 
belonging to the one, and the discoid part to the other. 
I have also some reason for suspecting that Euomphalus 
pentangulatus (tab. 45.) is liable to a similar variation 
by which it approaches to Cirrus acutus (tab. 141, f. 1.) 
Should this suspicion be confirmed by a series of speci- 
mens, one of the generae must be expunged. 
The specimens are from the inferior Oolite at Dun dry. 
CIRRUS Leachi. 
TAB, CCXIX.— Fig. 3. 
Syn. C. Leachi. Miller's MSS. 
Spec. Char. Conical, longitudinally striated ; 
whorls many, with several rows of tubercles 
crossd by numerous small carinae ; upper row 
of tubercles spiniform, compressed. 
This differs from the last in having a row of long 
compressed spines around the upper part of each whorl. 
The unique specimen from which I have given the 
sketch at fig. 3, is so mutilated, and so united with the 
stone, that a correct notion can hardly be obtained of it. 
It is possible that the length of the spines may be vari- 
able ; and consequently, some doubts may fairly be 
entertained of the propriety of treating it as a species. 
It is in Mr. Miller’s cabinet, who kindly lent it me, with 
the following observation in his catalogue : 
“ C. Leachi. — I named this after my esteemed friend, 
Dr. W. E. Leach, whose zeal to promote enquiries in 
Natural History cannot be praised sufficiently. Having 
been the first who brought C. nodosus into notice, I wish 
to preserve his name in this genus.’’ — With Mr. Miller’s 
sentiments I perfectly coincide ; and therefore gladly 
publish them. There are some vestiges of a second 
specimen of this, along with the larger specimen of 
Trochus sulcatus, (tab. 220, fig. 3.) on the side not shewn 
in the figure. 
