PLATE XIII. 



A RTICULINA. — PENEROPLIS. 



Diam. Page 



Figure 1. — Articulina conico-articulata, Batsch, sp. ; . . x 50 185 



„ 2. — Misshapen specimen, probably of the same species, x 50 



,, 3-5. — Articulina funalis, var. inornata, nov., . . x 30 186 



,, 6-11. — Articulina funalis, n. sp., . . . x 30 185 



Fig. 11. Specimen viewed by transmitted light, showing 

 the septation. 



,, 12-25. — Peneroplis pertusus, Forskal, sp., .... 204 



Fig. 15. Var. a, — Peneroplis ptlanatus, Fichtel and Moll, sp., x 50 



a, Lateral aspect ; b, front peripheral aspect. 

 Figs. 16, 17, 23. Var. o,- — Peneroplis pertusus, Forskal, sp. 

 Figs. 16 «, 17. Lateral aspect ; 16 5, front peripheral aspect, x 10 



Fig. 23. Section of a portion of the shell, by transmitted 

 light, showing the punctation of the wall, and the 

 stoloniferons passages, . . . x 200 



Figs. 18, 19, 22. Var. c, — Peneroplis urietinus, Batsch, sp., . x 10 



Figs. 18, 19 a, Lateral aspect ; 19 6, oral end. 

 Fig. 22. Longitudinal section of the shell. 

 Figs. 20, 21. Var. d, — Peneroplis eylindraceus, Lamarck, sp., x 60 



Lateral aspect. 

 Figs. 24, 25. Var. e, — Peneroplis lituus, Gmelin, sp. (?), . x 75 



Incomplete specimens. 

 Fig. 14. Var. /,— Peneroplis carinatus, d'Orbigny, . x 50 



a, Lateral aspect ; 6, front peripheral aspect. 

 Figs. 12, 13. Var.</, — Peneroplis loemgatus, Karrer, . x 50 



Lateral aspect. 



