Plate 44. 



Fig. 1. Cristellaria orbicularis, var. subcarinata. X 12. 



2. Cristellaria orbicularis, var. papillata. X 12. D5352. 



3. Cristellaria orbicularis, var. subumbonata. X 12. D5259. 



4. Cristellaria convergens. a, side view, X 26; b, edtre view, X 26. 



533 



