Palceozoic Bivalved Entomostraca. 259 



compressed-ovate, with very blunt extremities. Length -^-^ 

 inch. 



Discovered by the late Dr. Rankine, of Carluke, as impres- 

 sions in an alum-shale of the Carboniferous-Limestone 

 series at Raes Gill, Carluke. It is found in the same series 

 also at Boghead, Biantyre, Gair, Mousewater (Wilsontown), 

 in Lanarkshire j Craigenglen, Stirlingshire. 



23. BeyricMa varicosa^ sp. nov. (PI. VIII. figs. 10, XL) 



This species is somewhat akin in character to B. fodicata, 

 but it is smaller, and has larger lobes, of which it possesses 

 three, the anterior one being the largest. The valves appear 

 to have been strongly rimmed. Length 3'^ inch. 



Collected by Mr. James Bennie at Whitebaulks, Linlith- 

 gowshire, where it is rare. A similar form is found at Gair, 

 near Carluke, and also at Brunston Colliery, Midlothian. 

 These localities are all in the Carboniferous-Limestone series. 



24. BeyricMa (?) hiccesa^ sp. nov. (PI. VIII. figs. 12, 13.) 



Suboblong ; with rounded ends, the anterior being largest 

 and most projecting ; dorsal border straight and about two 

 thirds of the total length ; ventral border incurved at the 

 centre, rounded towards the ends ; valves compressed above, 

 rather convex below, and with two straight and parallel cuts 

 or narrow grooves that pass from near the antero-dorsal 

 border diagonally backward halfway across the valve ; sur- 

 face smooth. Length -3V inch. 



The straight narrow sulci of this species are not typically 

 Beyrichian, and we have only seen another Carboniferous 

 form with anything like them. This form is from Wey- 

 bourne, Cumberland (Carboniferous-Limestone series), and 

 has a single narrow groove. 



Sent tons by Mr. James Bennie from shale above E,obroy- 

 stone Limestone (Carboniferous-Limestone series) and labelled 

 " Woodhill." 



25. Primitia (?) Holliana^ sp. nov. 

 (PI. VlILfigs. 14 a, 14^, 14 c.) 



Small ; sublunate in outline, with convex valves ; dorsal 

 border straight, ventral border arched ; posterior extremity 

 subacute. A deep V-shaped sulcus marks the centre of the 

 valve ; lateral contour subovate ; surface smooth. Length 



- inch. 



