228 On the Palceozoic Bicalved Entomostraca. 



EXPLANATION OF THE PLATES. 

 Plate XIV. 



[The specimens are magnified 20 diameters.] 



Fig. 1. Cytherellina siliqua, Jones, sp., var. grandis, from the Woolhope 

 beds near the Wych, Malvern : a, perfect carapace, showing the 

 right valve ; 6, ventral view ; c, end view (posterior). 



Fig. 2. C. siliqua, Jones, sp. (common variety), from the Aymestry Lime- 

 stone of Chance's Pitch, Malvern : a, b, c, as the foregoing. 



Fig. 3. C. siliqua, var. tersa, nov., from the Wenlock Limestone near 

 Malvern : a, b, c, as the foregoing. 



Fig. 4. C. siliqua, var. ovata, nov., from the base of the Wenlock Shale 

 near Malvern, showing the right valve. 



Fig. 5. C. siliqua, Jones, sp. (common , variety) : a, right valve ; b, edge 

 view ; c, end view. From the base of the Upper Ludlow beds, 

 Hales End, Malvern. 



Fig. 6 a, b, d. The same ; casts with and without remains of the valve : 

 e, difigram of the edge view of cast and valve. From the same 

 place. 



Fig. 6 0. The same : cast of left valve. From drifted Scandinavian Lime- 

 stone. 



Fig. 7. Bairdia Phillipsiana, sp. nov., from the Wenlock Limestone near 

 Malvei'n : a, perfect carapace, showing the right valve and the 

 overlapping edges of the left valve ; b, ventral aspect ; c, end 

 view (anterior). 



Fig. 8. jEchmina cu.s2ndata,^Qn. ets^.noY. ; a fragment from the Wenlock 

 Limestone of Croft's Quarrv, near Malvern. (See also woodcut, 

 fig. 2.) 



Plate XV. 



[Fig. 10 c magnified 100 diameters ; all the others are magnified 

 20 diameters.] 



Fig. 1. Thlipstira corjndenta, gen. et sp. nov. ; from the base of the Wool- 

 hope beds, near ^lalvern : a, perfect carapace, with right valve 

 outwards ; 6, ventral view ; c, dorsal view ; d, hind end view. 



Fig. 2. Thlipsura tuberosa, sp. nov. ; fi'om the base of the Wenlock Shale, 

 Elton Lane, Ludlow : a, b, c, as the foregoing. (The specimen 

 has lost some of the thickness of its carapace-valves.) 



Fig. 3. Thlipsura V-scripta, sp. nov.; from the Wenlock Limestone, 

 Croft's Quarry, Malvern : a, left valve ; b, ventral view ; c, end 

 view. 



Fig. 4. Cgthere corbuloidcs, sp. nov. ; from the Wenlock Limestone, near 

 Malvern : a, right valve ; b, perfect carapace, with its right 

 valve outwards ; c, dorsal view ; d, ventral view ; e, posterior 

 view. 



Fig. o. The same, smaller individual ; Woolhope beds near Malvern : 

 a, perfect carapace, right valve outwards ; b, end view (poste- 

 rior). 



Fig. Q)a,b. Primitia umbilicata, J. & II. ; from Middle (?) Ludlow beds, 

 Abberley. Two valves, showing diil'erent conditions of the sub- 

 central depression, owing to crush and weathering. 



Fig. 6 c, d. Primifia remdina, J. & II. ; from Middle (?) Ludlow beds, Ab- 

 berley. Two casts (with some remains of shell) of somewhat 

 varying valves. 



I'^ig. 7. Beyrichia i)itermcdia, sp. nov. : a right (?) vah'c. Aymcstiy Lime- 

 stone, Chance's Pitch, Malvern. 



