JONES.] PAL/EOZOIC OSTRACODA. 85 



show the interior only, as usual on the slabs of the limestone. They 

 are near to L. Hisingeri in outline, though the hinge-line is rather too 

 long, and the ante ro-ventr til margin has too full a curvature (compare 

 fig. 9). The specimens figs. 10 and 11 are associated with Klosdenia 

 notata in the black Tentaculite limestone of Schoharie, State of New 

 York. Collected by Dr. G. J. Hinde, F.Gr.S. They were chosen for 

 illustration here because of the neat crenulation within the dorsal 

 margin (hinge-line) of each valve, which feature corresponds with the 

 delicate and fainter crenulation seen on the outside of the dorsal mar- 

 gin, in figs. 9 a and 9 b, of X. Hisingeri from Long Point, Lake V\^in- 

 nepegosis. An analogous crenulation is shewn in Kolmodin's figures 

 oi L. phaseolus, OtVersight, etc., 1880, pi. xix, figs. 4 b and c. 



It seems to me that more than one species has been included under 

 Jj. alta, and that some at least of the published figures show a varietal 

 relationship to JJ. Hisingeri. 



14. Leperditia phaseolus (Hisinger.) 

 PI. 13, figs. 1 and 8. 



Cytherina phaseolus, Hisinger. Anteckn. Phys. Geogii., vol- V, 1831, pp. 110-135, 



pi. viii, fig. 3; Lethcea Suecica; 1837, p. 9, pi. i, fig. 1. 

 Leperditia Angelini, Schmidt. Mem. Acad. Imp. Sci. St.-Petersbourg, Ser. 7, 



vol. XXI, No. 2, 1873, p. 13. figs. 13-18. 

 Leperditia phaseolus, Kolmodin. Ofvers, k. Vet.-Akad. ForhandL, vol. XXXVI, 



1880, p. 134, pi. xix, figs. 4 and 5. 

 Leperditia phaseolus, Schmidt. Mem. Acad. Imp. Sci. St.-P^tersbourg, Ser. 7, 



vol. XXXI, No. 5, 1883, p. 9. 



Length, (hinge-line), height, thickness. 



mm. mm. mm. mm. 



PI. 13, fig. 7........ 12- (8-2) 7- 4-6 



PI. 13,fig. 8 11- (6- ) 



Kolmodin's pi. 19, fig 4 12-5 1 au 4.3*1, +i, i 4.1.^+1, i 



Kolmodin's pi. 19, fi| 5 14 • | ^^^"* ^^^« *^® ^^^^th of the valve. 



PI. 13, figs. 7 and 8 are more like Kolmodin's fig. 4 h than his other 

 figures, as to the ends of the hinge-line, and like his 5 6 in the more 

 equal curvature of the ventral border. 



The typical L. phaseolus is smaller and relatively longer than L. 

 Hisingeri, having less ventral depth. Our specimens, figs. 7 and 8, 

 which approach L. phaseolus, have a more equal or symmetrical ven- 

 tral curvature than the type. The specimen shewn by the woodcut 

 of L. phaseolus, var. Guelphica, the form (l^o. 15) next to be con- 

 sidered, has moreover a greater height from the ventral to the 

 dorsal border, and it may be regarded as a recognizable variety. 



3 



