GASTEROPODA. Wy 
very fine densely-arranged longitudinal lines. The latter features are not exhibited by the 
specimen from Scarborough ; but one, of more advanced growth, from the Inferior Oolite 
near Minchinhampton, is much larger and more satisfactory. The upper portions of the 
whorls are flattened, smooth, and even a little sulcated ; the imner lip is thin; the base is 
rounded, so that it neither exhibits the thickened lip of Zittorina, nor the basal produced 
form of Zurbo. Length of the Scarborough specimen 5 lines, transverse diameter of the 
last whorl 4 lines. 
Locality. Great Oolite near Scarborough. 
Turzo Puituirsi. Plate XV, figs. 12, 12a, 6. 
T. Testaé trochiformi, cingillatdque costatd ; costis striato-nodulosis ; striis indentis ; 
strits longitudinalibus numerosissimis ; anfractibus planis ; aperturd subrotundd, basi effusd, 
vel productiori. 
Shell trochiform, encircled with numerous ribs; ribs striated and nodulous;  striz 
longitudinal, very numerous, mdenting the ribs; volutions flattened; aperture rounded ; 
its base effuse, or produced anteriorly. 
Two ribs, more prominent than the rest occupy the middle of the last whorl, and give 
it rather an angulated figure; the pointed extremity of the base removes it from the 
Littoring. Longer diameter 9 lines, transverse diameter 7 lines. 
Named in compliment to the author of the ‘Geology of Yorkshire.’ 
Locality. Great Oolite near Scarborough. 
PHASIANELLA LATIUSCULA. Plate XV, fig. 16. 
P. Testé ovata, spird acuta, elatd ; anfractibus (6) latis,. convexiusculis ; anfractu 
ultimo subventricoso. 
Shell ovate, spire acute, elevated; whorls (6) broad, convex, the last whorl rather 
inflated. 
This may be considered as a form connecting our P. elegans and P. tumidula; the 
spire is much more elevated than in the latter species, and the whorls are wider than in the 
former. ‘These remarks, however, are made with the reservation which must be exercised 
in describing casts, for the specimen figured is in that condition. The length is 1 inch, 
the transverse diameter 7 Ines. 
Locality. Near Scarborough. 
16 
