826 DEt F. R. C. REED ON THE 



Horizons. — (l) Saugh Hill Group ; (2) Penkill Group ; (3) Camregan Group. 

 Localities. — (l) Woodland Point, Newlands ; (2) Penwhapple Glen; (3) Bargany 

 Pond Burn. 



Genus Pseudocrania, M'Coy. 



Pseudocrania divaricata, M'Coy. 



1851. Pseudocrania divaricata, M'Coy, Ann. Mag. Nat. Hist., ser. 2, vol. viii, p. 388. 



1852. Pseudocrania divaricata, M'Coy, Syn. Brit. Pal. Foss. Woodw. Mus., p. 187, pi. ih, figs. 1, 2. 



1853. Crania divaricata, M'Coy, Davidson, Mon. Brit. Foss. Brack., vol. i, Introd., p. 122, tigs. 246, 247. 

 1866. Crania divaricata, M'Coy, Davidson, op. cit., vol. iii, pt. vii, p. 78, pi. viii, figs. 7-12. 



This species was not recorded by Davidson # from the Girvan area, but a poor 

 specimen occurs in Mrs Gray's collection from the Starfish Bed, measuring about 

 25 mm. in length, and showing the typical characters. 



Horizon. — Drummuck Group (Starfish Bed). 



Locality. — Thraive Glen. 



Pseudocrania multifilosa, sp. nov. 

 (Plate V, fig. 5.) 



Shell broadly oval to elliptical, convex, capuliform, forming low cone with 

 excentric subacute apex directed forwards and situated from posterior margin about 

 one-third the length of the shell. Surface of shell marked with a few concentric 

 growth-lines and wrinkles and with closely placed very numerous delicate radiating 

 fine lines, curving slightly back at sides. 



Dimensions. — Length, 8"0 mm. ; width, 6'5 mm. ; height, 3'2 mm. 



Horizon. — Druminuck Group (Starfish Bed). 



Localities. — Drummuck, Thraive Glen. 



Remarks. — This species does not seem closely allied to any previously described 

 British species. The interior is unknown. 



Pseudocrania aff. depressa (Eichwald). 



(Plate V, fig. 6.) 



aff. 1842. Orbicula depressa, Eichwald, Urwelt Russland, ii, p. 76, t. i, fig. 11. 



Shell subquadrate, widening somewhat anteriorly, truncate posteriorly. Brachial 

 valve convex, rounded, capuliform, most elevated towards posterior end ; posterior 

 face steep, short, abrupt; interior of valve showing (l) broad flattened marginal 

 limb ; (2) weak median longitudinal ridge leading to shallow emargination of front 

 margin ; (3) pair of large oval anterior occlusor muscle-scars well defined except in 

 front and closely placed to median ridge which separates .them, situated behind middle 

 of shell ; (4) low broad rounded concentric ridge at posterior end of valve, halfway 



* Davidson, Mon. Brit. Foss. Brach., vol. iii, pt. vii, pp. 79, 80 ; Von Huene, op. cit., p. 224. 



