Aegiope, or Mbgathyms. 

 Fig. 



20. T. CAPHT-SERPENTis, Linn. (Anomia.) — A. and T. retusa, puiescem, 



costata, and aurita. — Oban, Skye, etc., 20 to 50 fath., Mr. 



21. A. ciSTELLTJLA, S. Wood. {Tereirattdu.) — A. semimdum?, T. 



22. A. DECOLLATA, Ckemn. — A. detruncata. — Guernsey, R. 



23. A. SEMiNULUM, VldUppi. — Croulin, near Skye, Jeffreys, 



Crania. 



24. C. anomala, Muller. {Patella.) — Fat. Anomia, Discina, and Criqpus 



distoHa, ostreoides, personata, and rostrata. — Zetlaufl, Arran, 

 Lerwick, Cork, Mr. 



