362 F. JR. Cowjjer Reed — New Fossils frotn Haver ford nest. 



compared with others, we may mention Pleurotomaria lielicina, 

 Lindstrom,^ and especially PI. cequilatera, Wahlenb.,- as bearing 

 much resemblance to it. 



Tkochonema sp. 



There is one fairly good but compressed specimen from Upper 

 Slade in Mr. Turnbull's collection which must be referred to this 

 genus. The shell is conical, of 4-5 whorls (only 3 are preserved) ; 

 the whorls are rather low, with their upper surface more or less 

 flattened and horizontal, their periphery angular and carinate, and 

 their outer face nearly vertical to the suture ; the base of the shell i& 

 more or less convex and rounded. On the upper surface of the 

 whorls there is a shoulder-like, flat space round the suture ; a weak 

 carina separates it from the rest of the upper surface, which is 

 slightly concave. The peripheral carina is strong and prominent, 

 and the outer side of the whorl below it is nearly at right angles to 

 the upper surface, and bears, low down, traces of one or two faint 

 revolving carinas. The whole surface of the whorls is crossed by 

 coarse, oblique, continuous growth-lines, meeting the peripheral 

 carina at about 45°, and passing over it and over the upper surface 

 of the whorls without deflection. Apical angle of shell 100°-120°. 

 Height about 21 mm. ; basal width about 17 mm. 



Horizon. — Slade Beds. 



Locality. — Quarry at Upper Slade. 



Bemarlis. — This imperfectly-known shell resembles in many 

 respects T. umhilicatum, Hall,^ but the obliquity of the growth-strise 

 is a distinguishing feature. 



Abchinacella Prendergasti, sp. nov. (PI. XX, Figs. 8, 8a, 9.) 



Shell subcircular or subelliptical, equally rounded at both ends, 

 convex, rounded, subconical, rather high, with highest point 

 situated subcentrally behind apex ; apex submarginal, incurved, 

 sharp, not overhanging margin, but surface of shell below it steep 

 and more or less excavated. Kostral scars large, oval, with traces 

 of a small circular pair behind them and more closely placed 

 together. Muscular band forming small, continuous loop, extending 

 back a little over two-thirds the distance from apex to posterior end. 

 Surface of shell marked by concentric, slightly wavy growth-lines, 

 strongest near margin. 



Dimensions (both specimens are somewhat crushed) : 



I. II. 



Length 13-50 22-0 mm. 



Width 17-30 13-5 mm. 



Height 7-75 8-5mm. 



Horizon. — Kedhill Beds. 



Locality. — Prendergast Place, Haverfordwest. 



' LindstriJm: op. cit., p. 124, pi. xi, figs. 34-37. 

 - Limlstrom: op. cit., p. Ill, pi. ix, figs. 20-29. 



3 Hall: Pahvoiit. N.Y., vol. 1 (1847), pp. 43, 175. Ulrich: op. cit., p. 1047,. 

 pi. Ixxvii, figs. 1-8. 



