OCR Text |
Show PLATE 2. Page. FIG. 1. PIIOLADOMYA SUBELONGATA ; reduced to less than twc- tbirds the natural diameter 362 1 a. Dorsal view of same. FIG. 2. GONIOMYA BOREAUS 362 A left- side view, reduced in the same war. FIG. 3. THRACIA? OCCIDENTALS; reduced as above 3€ 3 3 a. Dorsal view of same. FIG. 4. THRACIA? SUBTRUKCATA ; reduced in same way 363 4 a. Dorsal view of same. FIG. 5. CYPRIMERIA f TENUIS ; mould of exterior surface left in matrix, reduced in size 361 5 a. An internal cast of a smaller specimen; reduced. 5 b. Profile of same. FIG. C. ARCA EQUILATERALIS ; Bide view of au internal cast, showing muscular impressions and traces of radiating strise, reduced in size as above.. 357 6 a. Dorsal view of same species. FIG. 7. TRIGOKIA EVANSI ; side view of the original imperfect specimen, reduced in size, and retaining portions of the shell 359 7 a. Side view of a gutta- percha cast, taken from a nearly perfect mould or impression left in the rock; reduced in size. 7 b. A dorsal view of a cast from a mould left in the rock; reduced in size. FIG. 8. MACTRA GIBDSANA ; reduced in size ( age doubtful) 374 8 a. Portion of an internal oast, showing the posterior muscular impression and the pallial line of same species; reduced as above. 8 I. Outline anterior view of same species. |