Paj;«. 

 Fi<;. 11. AXIN.KA SUBIMBRICATA 95 



11, a. Exterior view of the broken right valve of type-specimen. 



14, 6. An interior and hinge view of apparently a young specimen of same. 



14, c. Exterior of same. 



14,(7. An interior and hinge view of an imperfect large valve. 



Fig. 15. Ci/cuLLiE.Y (Idoxearca) Shumardi hg 



15,a. A left-side view of a young shell showing the free margin of the left valve projecting 

 beyond that of the right {type-specimen). 



15, ft. A hinge view of a larger specimen. 



15, c. An external left-side view of still larger specimen, with radiating markings obsolete. 



15. d. An internal cast showing muscular and pallial impressions. 



15, e. A posterior view of the same, internal cast, showing the furrows left by the projecting 



margins of the posterior muscular scars. 

 15,/. A smaller less oblique specimen, the left valve of which has been bored by some Gaste- 



ropod. 

 15, r/. An anterior view of the same. 



Fig. ID. Nucula planimargixata 101 



A left-side view of an internal cast, showing the muscular and pallial impressions, 

 hinge-denticles, etc. 



Fig. 17. Limopsis parvdla 97 



17, a. A right-side view of the type-specimen (almost entirely destitute of radiating markings), 



magnified nearly two diameters. 

 17, b. A dorsal view of another specimen, showing cardinal area, magnified iu the same way. 



17, c. Another specimen, showing a part of the shell, with the radiating markings, also mag- 



nilied. 

 Fig. is. Lingula-nitida 9 



18, a. One of the valves, magnified a little more than two diameters (type-specimen). 

 18, b. A side view of same, to show convexity. 



Fig. 19. Solemya slbrlicata 129 



A specimen consisting of the two valves opened out and lying together iu the rock ; their 

 posterior margins being broken away, and the umbonal portions partly exfoliated 

 (type-specimen). 



28-2 



