584 J. W. KIRKBY ON MABTNE POSSILS IN THE 



LiTTORiNA scoTOBUBDiGALENSis, EtheridgG, Quait. Journ. Geol. Soc. 

 Yol. xxxiv. p. 18, pi. ii. f. 26, 27. 



This little univalve is exceedingly abundant in some of the heds 

 about Billow Ness and Pittenweem. "What I take to be typical ex- 

 amples have rounded whorls, which, in good preservation, show dark, 

 transverse bands of colour. 



LiTTORINA? BIIINEATA, Sp. UOV. 



I have several examples of another little univalve, found along 

 with the preceding species in the limestone of Zone 7, Pittenweem, 

 which appears to be distinct and undescribed. 



It is about -i- of an inch high, with a depressed spire less than 

 half the height of the body- whorl. The body- whorl is flat-topped, 

 channelled at the suture, compressed at the sides, which slope out- 

 wards, and subangulate where the sides bend over towards the 

 suture ; two spiral impressed lines traverse the upper half of the 

 whorl, the lowermost near the centre of the whorl and the other 

 midway between it and the angulation. The aperture is subovate, 

 round below, with the outer lip angulate above. Some specimens 

 show a slight umbilicus, and most of them appear to be rather 

 thick-shelled. 



The generic afiinities of this shell (as well as of the preceding 

 species) are not very clear, and it is placed in Littorina with some 

 doubt. 



Lacuna antiqtja ?, M'Coy, Syn. Garb. Foss. Ireland, p. 32, pi. v. 

 f. 24. 



One of the most common univalves of the limestone east of Rander- 

 stone Castle is a small shell that may possibly belong to Euomphalu^, 

 though it agrees so closely with M'Coy's figures and descriptions of 

 his Lacuna antiqua, except in the form of its aperture, that I doubt- 

 fully refer it to that species. The shell is depressed and formed of 

 three whorls ; the body-whorl is large, rounded, and -^(,- of an 

 inch wide ; the spire is small, the umbilicus large, and the aperture 

 is round and entire. 



Macrocheiltjs ? sTRiATULtrs, n. sp. 



This is a comparatively common shell in some of the Eanderstone 

 beds, and it is found more sparingly in Zones 10 and 18 of the 

 Pittenweem and Anstruther section. 



The largest specimens are -f^j of an inch long, and -^ or rather 

 more wide. The body-whorl is three fourths of the entire 

 length, wide and flat above, and contracted towards the base. The 

 spire is short and formed of four or five flattish whorls. The surface 

 is spirally threaded with fine and regular lines in well-preserved 

 specimens. 



Professor De Koninck, who has kindly examined specimens of 

 this shell, remarks that it has some resemblance to Macrocheilvs 

 canaliculatus, M'Coy, and that it is doubtful whether it belongs to 

 Macrocheilus^ an opinion with which I entirely agree. 



