PLATE XIII. 



Fig. Page. 



J. Trematonotus dilatatus (Sowerby). Front view. Half nat. size. Wen- 

 lock Limestone, Burrington, near Ludlow. Mus. Pract. Geo). 

 [6712 J. 80. 



2. Ditto, var. girvanensis, nov. Front view. Nat. size. Saugli Hill 



Group, Woodland Point, Girvan. Mrs. Gray's Coll. 83. 



3. Ditto. Dorsal view of another specimen. Nat. size. Same horizon, 



locality and collection. 83. 



4. Trematonotus portlocki, sp. nov. Front view. Nat. size. Upper Bala 



Beds, Desertcreat, Tyrone. Mns. Pract. Geol. [27996]. 83. 



A-n. Ditto. Lower portion of same specimen. X 2. 83. 



4/;. Ditto. Ornamentation, x 10. 83. 



5. Phragmostoma decipiens, sp. nov. Dorsal view, x §. Mulloch Hill 



Group, Mulloch Hill, Girvan. Mrs. Gray's Coll. 84. 



6. Ditto. Side view of internal cast. Nat. size. Same horizon, locality 



and collection. 8 1. 



7. Ditto. Impression of umbilical portion, showing ornamentation. X -. 



Same horizon, locality and collection. > s 4. 



8. Carinaropsis gracilis, sp. nov. Dorsal view, x 12. Balclatchie Group, 



Balclatchie, Girvan. Mrs. Gray's Coll. * s <>. 



9. Ditto. Ditto. X 2. Same horizon, locality and collection. 86. 

 10. Carinaropsis maccoyi, sp. nov. Dorsal view, x 5. Middle Bala, Dolvdd 



Ceiriog Waterfall, E. of Berwyn Mts. Sedgwick Mns. 87. 



