PLATE XII. 



Fig. Page. 



1. Salpingostomy asteroideum, sp. nov. Dorsal view. x 2. Drummuck 



Group, Thraive Glen, Girvan. Mrs. Gray's Coll. 7 : >. 



la. Ditto. Ornamentation of same specimen. x 5. 75. 



2. Ditto. Side view of another specimen. Nat. size. Same horizon, 



locality and collection. 75. 



:'>. Solpingostoma buccinoideum, sp. nov. Side view. x 1 !. Balclatchie 



Group, Balclatchie, Girvan. Mrs. Gray's Coll. 76. 



3ft. Ditto. Front view of same specimen. X 1.]. ■ 7<>. 



36. Ditto. Dorsal view of same specimen. X LI- 76. 



I. Solpingostoma etheridgei, sp. nov. Side view. Nat. size. Stinchar 



Limestone Group, Craighead, Girvan. Mrs. Gray's Coll. 77. 



-h/. Ditto. Posterior view of same specimen. Nat. size. 77. 



5. Solpingostoma? infundibulum (Salter MS.). Apertural view. Nat. size. 



Lower Ludlow, Vinnal Hill. Mus. Pract. Geol. [28070]. 7s. 



(I. Solpingostoma shallochense, sp. nov. Dorsal view. Nat. size. White- 

 house Group, Shalloch Mill, Girvan. Mrs. Gray's Coll. 88. 



6a. Ditto. Ornamentation of oral expansion of same specimen, x <>. 88. 



7. Trematonotus oymestriensis (Sowerby). Side view, internal cast, x H- 



Aymestry Limestone, Aymestry. Mus. Pract. Geol. [6709]. 79. 



8. Ditto. Part of dorsum, posterior view. Nat. size. Lower Ludlow. 



Mary Knoll. Ludlow. Mus. Pract. Geol. [28071]. 70. 



8". Ditto. Dorsal view of apertural expansion of same specimen. Nat. size. 79. 



