APrENDrx. 
23 
LITTOBXNA. Feruassac. 
L. Carolinensis , pi. 4-, fig. 11. Ovate-acnte, volutions 5 or 6, those of 
spire slightly convex, revolving lines prominent subequal ; not alternated, 
rugose, 8 on the penultimate volution and 22 on last volution ; suture 
deeply impressed. 
L. Caroliuensis. Conrad. Proceed, of the Acad. Nat. Sci. vol. 14, 
p. 5G7. 
L. irrorata. Tuomey and Ilolmes, (not Say.) 
L. Carolinensis , Var. pi. 4, fig. 10. Shell elongated, volutions convex, 
revolving lines large, 8 on penultimate, and 16 on last volution. 
C J' /y Ac ty -tT o>t. 
BUSY CON. Bolten. Subgenus SYCOTYPUS. Browne. 
Iverrii , pi. 4, fig. 2. Shell pyriform, thick, elongated ; last volution 
long and comparatively narrow ; spire scalariform, volutions flat on the 
top, augle carinated slightly on the spire, conspicuously on the last volu- 
tion, and subtubercated and subacute; a wide contraction of the volution 
forms a concave furrow round it beneath the carina ; revolving lines coarse 
and wrinkled ; canal long and wide, slightly oblique. 
This large species measures 9 inches to the top of the penultimate vo- 
lution, where the spire is broken. There is no canal around the suture in 
this large specimen, and it differs from Busycon only in wanting spines. 
I think, therefore, that Sycotypus is a subgenus of Busycon. It is 
probably tubercated in young specimens, the traces of which are observed 
on the summit of the large volution. 
It was found by Prof. Kerr at James King’s marl pit, Sampson count}’. 
A comparatively young specimen has been found which shows a slightly 
impressed canal, and the top of last volution sloping obliquely inwards. 
J. B. amoenum. Shell pyriform, spire scalariform ; sides of volutions 
straight, direct, angle acute, with longitudinal tubercles, top of large volu- 
tion flat, canal slightly impressed, obsolete on the spire which is acutely 
pointed, the two first volutions smooth ; spiral lines rather fine, unequal, 
columellar told prominent and the furrow above it rather deeply impressed. 
Locality. Walker’s Bluff, Cape Fear river. Allied to ca7ialiculatum 7 
but distinguished by its slight canal and absence of a carinated line bor- 
dering the suture and angle of last volution. 
oT, B. conchinum. Shell pyriform, with unequal very distinct prominent 
spiral lines ; volutions prominently carinated, those of the spire tubercu- 
