ORDOVICIAN AND SILURIAN BRACHIOPODA OF THE GIRVAN DISTRICT. 995 



Fig. 25. Camarella 1 cuneatella (Dav.). Complete shell, brachial side. x 3. Balclatchie Group 

 (conglom.), Balclatchie. G. (Figured, Davidson, Suppl., pi. x, fig. 11.) 



Fig. 25a. Ditto. Side-view of same specimen. x 3. 



Fig. 26. Ditto. Brachial valve. x 2. Same horizon and locality. G. 



Fig. 27. Camarella Peachi (Dav.). Complete shell, brachial side. x \\. Stinchar Limestone Group, 

 Craighead. G. (Figured, Davidson, Suppl., pi. xi, fig. 25.) 



Fig. 27a. Ditto. Side-view of same specimen. x\\. 



Fig. 28. Ditto. Complete shell, pedicle side. xl|. Same horizon and locality. G. , 



Fig. 28a. Ditto. Anterior view of same specimen. x 1^. 



Fig. 29. Camarella Thomsoni (Dav.). Complete shell, brachial side. x 1-3,-. Stinchar Limestone 

 Group, Craighead. G. 



Fig. 29a. Ditto. Anterior view of same specimen. x 1|. 



Fig. 296. Ditto. Outline side-view of same specimen. x 1^. 



Fig. 30. Ditto. Complete shell, pedicle-valve. x 1J. Same horizon and locality. G. 



Fig. 31. Ditto, ditto. xl|. Same horizon and locality. G. 



Fig. 32. Ditto. Complete shell, brachial side. x \h- Same horizon and locality. G. 



Fig. 33. Parastwphia emerita, sp. nov. Internal cast of brachial valve. x 2. Stinchar Limestone 

 Group, Craighead. G. 



Fig. 34. Ditto 1 var. Internal cast of brachial valve. x 2. Balclatchie Group, Dow Hill. G. 



Fig. 35. Parastrophia rotunda (Sow.). Internal cast of brachial valve. Nat. size. Penkill Group, 

 Penkill. G. 



Fig. 36. Ditto, ditto. Nat. size. Same horizon and locality. G. 



Fig. 37. Ditto, ditto. Nat. size. Same horizon, Penwhapple Glen. [L. 84.] H.G. 



Fig. 38. Ditto, ditto. x 1^. Same horizon, Penkill. G. (Figured, Davidson, Suppl., pi. ix, fig. 9.) 



Fig. 38a. Ditto. Posterior view of same internal cast of complete shell. x 1£. 



Fig. 39. Ditto. Internal cast of pedicle- valve. Nat. size. Same horizon and locality. G. 



Fig. 40. Ditto. Internal cast of umbonal region of pedicle-valve, x l£. Same horizon and locality. G. 



Fig. 41.. Ditto. Internal cast of muscle-scars of pedicle-valve. x 2. Same horizon and locality. G. 



Fig. 42. Parastrophia^. Salteri (Dav.). Brachial? valve. x 2. " Caradoc," Penwhapple Glen. 

 [11968.] M.P.G. (Figured, Davidson, vol. iii, pi. xxiv, fig. 19.) 



Fig. 43. Parastrophia scotica (Dav.). Complete shell, brachial side. x l-£. Stinchar Limestone 

 Group, Craighead. G. (Figured, Davidson, Suppl., pi. xi, fig. 26.) 



Fig. 43a. Ditto. Anterior view of same specimen. x 1£. 



Fig. 44. Parastrophia thraivensis, sp. nov. Internal cast of pedicle-valve, x 2. Starfish Bed, Drummuck 

 Group, Thraive Glen. G. 



Fig. 45. Ditto, ditto. x 2. Same horizon and locality. 



Fig. 46. Parastrophia Youngi, sp. nov. Complete shell, anterior view. x 1|. Stinchar Limestone 

 Group, Craighead. G. 



Fig. 46a. Ditto. Side-view of same specimen. x 1£. 



Fig. 47. Ditto. Internal cast of complete shell, pedicle side. x 1|. Balclatchie Group, 

 Balclatchie. G. 



Fig. 47a. Ditto, ditto. Same specimen, brachial side. x 1|. 



Fig. ilb. Ditto, ditto. Same specimen, anterior view. x \\. 



Fig. 48. Stricklandinia lens (Sow.), var. Internal cast of brachial valve. xl|, Saugh Hill Group, 

 Newlands. G. 



Plate XXIII. 



Fig. 1. Stricklandinia lirata (Sow.), var. nov. scotica. Brachial valve. Nat. size. Saugh Hill 

 Group, Woodland Point. G. 



Fig. 2. Ditto. Posterior view of complete shell. Nat. size. Same horizon and locality. G. 



Fig. 3. Ditto. Umbonal region of complete shell. Nat. size. Same horizon and locality. (Figured, 

 Davidson, Suppl., pi. ix, fig. 2.) 



TRANS. ROY. SOC. EDIN., VOL. LI, PART IV (NO. 26). 141 



