CYPRIDINA. 17 



6. Cypridina Grossartiana, /. and K. Plate II, figs. 20 a, b, c. 



Cypbidina gkossartiana, J. and K., 1867. Trans. Geol. Soc. Glasgow, vol. ii, p. 



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



Carapace ovate-oblong; moderately gibbous, but compressed along the margins, 

 especially anteriorly; broadest (deepest) in the front half; but the antero-dorsal or 

 nuchal region suddenly sinks in before it curves ofi" into the beak or penthouse over the 

 strongly marked notch. The gape seems to have been small. End-view acute-oval ; 

 edge-view long-acute-ovate. 



Length 2^; height ^; thickness ^ inch. Proportions 14^ : 9 : 5. 



.The nuchal depression, giving a somewhat hump-backed appearance to the carapace, 

 is present also to a great or less extent in some recent Cypridinads. We know of no 

 species like C. Grossartina in form of valve and shape of beak. 



We name this species after Mr. W. Grossart, Surgeon, of Salsburg, Lanarkshire, who 

 collected it near Blackburn, a mile and a half south-east ^of Bathgate, Linlithgowshire, 

 from ironstone-shale six feet above the "Eurypterus Limestone,"^ and 345 fathoms under 

 the Ell Coal. 



7. Cypridina Youngiana. Sp. nov. Plate II, figs. 11 a — c. 



Carapace-valve broadly oblong ; subcompressed, semicircular behind ; curved below ; 

 nearly straight on the back ; posterior broader and fuller than the anterior, where a neat 

 median notch (the projection is slightly lessened by injury in this specimen) forms a 

 large gape (fig. W b). 



The specimen consists of a cast of the interior, retaining a small fragment of the 

 shell posteriorly, and showing a distinct, large, radiate Muscle-spot in the antero-ventral 

 region. The radii are longer on the hinder than on the front half of the spot, the centre of 

 convergence being towards the front. End-view of the carapace acute-oval ; edge-view 

 compressed ovate, broadest behind. 



Length f ; height \ ; thickness ^ inch. Proportions 13 : 9^ : 6. 



This was found by Mr. James Thomson, of Glasgow, at Gare, Carluke, in the Upper 

 Limestone-shale, 202 fathoms below the Ell Coal. It is named after Mr. John Young, 

 the energetic Assistant-curator of the Hunterian Museum, Glasgow, who has worked 

 assiduously in collecting, classifying, and elaborating the Carboniferous Entomostraca of 

 the Glasgow District. 



^ This is a local limestone, found at Kirkton, near Bathgate, and appears to be associated with the 

 limestones at the bottom of the Scotch Coal-measures. It was noticed by Dr. Hibbert, in ' Trans. Roy. 

 Soc. Edinb.,' vol. xii. 



C 



