VOL. XV. (3) | BUCKMAN—LIAS AMMONITES 249 
APPENDIX 
A. FORFICATUS, Strickland-Buckman. 
I took advantage of the opportunity of borrowing Strickland’s 
types of A. acuticosta, to ask for the loan of his holotype of A. forficalus, 
which was kindly granted. As this species has never been figured, 
only described, it seems desirable to give a figure in the present com- 
munication. Both the person who named it and the specimen itself 
have much local connection with the Cotteswold Club; it is most 
fitting that the Club should figure such an interesting species. 
CORONICERAS FOREICATUM (Strickland-Buckman) 
Pl XxX... fie’ 3: 9: 
‘Zid. 1844, J. Buckman in Murchison, Geol. Chelt., Ed. 
2, p. 104 (A. forficatus Strickland [MS.]). 
Tf. None. 
Hor. Lower Lias [Sinemurian, votiformis hemera]. 
Loc. Eckington, [Worcestershire]. 
The following is the original description :— 
“A. fortficatus (Strickland)—Back with three keels, the 
middle one the most prominent, with a well-marked furrow 
on each side. Volutions 5 to 6, almost wholly exposed, 
with numerous, not very regular, nearly straight, simple 
ribs, some inclined dackwards, extending from the inner 
margin of the volution nearly to the outer keel. Of 
every three ribs, two are united at their outer ends by a 
prominent flattened tubercle, and may be compared to a 
pair of forceps, the third rib being single and alternating 
with the united ones: this arangement is not quite regular, 
as a single rib ending in a tubercle sometimes alternates 
with a plain one. The outer volution has about 36 ribs, 
and occupies about a quarter of the whole diameter ; 
aperture nearly square; diameter about 2 inches; thick- 
ness half-inch.” 
The species is near to A. senemuriensis, dOrbigny 
(1844, Ceph. T. Jur., Pal. franc., Pl. xcv, figs. 1, 2), but is 
not so stout, or so broad in periphery, has less coarse, 
more approximate ribs, more backwardly directed; and 
the single ribs come in more frequently. It is more like 
