/ 



CYPRIDINA. 19 



outline, somewhat compressed, being less convex than C. FldUipsiana, and notched with 

 a deeper sinus in the middle of the front edge. It bears a large, circular, radiate Muscle- 

 spot rather higher up than in figs. 5 and 9 of PI. II. There is also present a 

 considerable depression or nuchal furrow, in the anterior third of the dorsum, above the 

 muscle-spot. 



Size — \ inch long. 



We name this species after Mr. J. R. S. Hunter, of Beaushields, near Carluke, who, 

 with Dr. Selkirk, has successfully worked the Braidwood Limestone, and added much 

 to our knowledge of its palaeontology. Mr. Hunter has obtained numerous 'Entomodraca 

 from the debris of decomposed limestone in the large crevices traversing the rock. 

 These once formed subterranean watercourses, and the limestone has been extensively 

 disintegrated by the solvent and mechanical action of the water, the organic particles 

 resisting destruction more successfully than the matrix. 



10. Cypridina Thomsoniana, /. and K. ' Plate II, figs. 8 a — c ; Plate V, fig. 4. 



Cypridina Thomsoniana, J. and K., 186/. Trans. Geol. Soc. Glasgow, vol. ii, p. 218; 



and vol. iii, Suppl., 1871, p. 27. 



Carapace-valve subquadrate in outline ; convex, especially below and behind ; semi- 

 circular below (ventral) ; broadest and elliptical above, with a slight angle at the 

 small notch in the upper portion of the front edge (slightly modified by pressure in the 

 specimen). 



Posterior half fuller than the anterior, therefore the antero-dorsal region of the 

 carapace is somewhat compressed. End-view and edge-view both ovate, but the latter 

 the longer. 



Surface reticulated all over (not partially as in fig. 8 a), with circular spots (PI. 

 V, fig. 4), somewhat like those of Polycope simplex from Braidwood. 



Length \; height \; thickness ^ inch. Proportions 11:9:8. 



This species is named after Mr. James Thomson, of Glasgow, who found the 

 specimen in a small ironstone nodule from the Upper Limestone-shale, 202 fathoms below 

 the Ell Coal, at Gare, Carluke. 



11. Cypridina pruniformis. Sp. nov. PI. V, figs. 9 a, 9 ^, 9 c. 



Carapace plum-shaped ; very similar to C. Thomsoniana (PI. II, figs. 8 a, b, c), but 

 larger, not truncated behind, less oblong and more elliptical in side-view, and notched 

 lower down in front, with a somewhat larger beak and gape. Muscle-spot radiate, large. 



Length \; height \; thickness inch. Proportions 15 : 12 : 10. 



From the Carboniferous Limestone; Limerick (?). Vise, Belgium; Brit. Mus. 



