44 
BULLETIN OF THE LABORATORIES 
PAL/€ONEILO IGNOTA, sp. n. 
(Plate IV, Fig. 15.) 
Shell of medium size, moderately convex, rather thick, height 
two-thirds the length, the greatest height a little posterior to the beaks 
which are one-third the distance from the front, basal margin semi-ellip- 
tical, terminating before and behind at nearly one-half the height ; an- 
terior margin sub-parabolic ; posterior outline rather acutely terminat- 
ing at about one-third the height from the somewhat oblique hinge ; 
posterior projection compressed; surface most ventricose near the mid- 
dle, marked only by very fine, numerous, crowded concentric striae. 
Hinge with five moderate teeth in front and fifteen or more very fine 
denticLiles behind which diminish toward the beak. 
The shell could easily be mistaken for a Nucula (Ctenodonta) as 
frequently used but is obviously related to the group of Palaeoneilo, 
found in the Chemung. Length, 14 mm., height, 9 mm. 
Moderately abundant in Nodules at Moot’s run. Licking Co. 
This species bears some resemblance to P. bedfordensis. Meek, 
but is not sinuous or greatly compressed posteriorly. 
PALAEONEILO (NUCULA ?) CURTA, sp. n. 
(Plate IV, Fig. 4.) 
Quadrangularly sub-oval, moderately convex, hinge and front 
margins sub-parallel ; posterior margin evenly rounded, anterior mar- 
gin acutely angled, lunule strong; beak one-fourth from the front; 
hinge in front of the beak with five or six small teeth, behind with sev- 
en stronger denticles. Length, ii mm., height, 6.5 mm. Freestone 
of middle Waverly. 
PALAEONEILO SULCATINA, Win. 
(Plate IV, Fig. 17.) ^ 
Quite common forty feet below conglomerate I, Union, Licking 
county. 
NUCULA (CTENODONTA) HOUGHTONI, 
(Plate IV, Fig. 3 ; Plate X, Figs. 4, ?.) 
This species in several minor varieties seems to extend from the 
