FORAMINIFERA. 



1900. Chapman, F. Foraminifera from the Tertiary of California. 

 Proc Cal. Acad. Sci., Ser. 3, Vol. I., pp. 241-260, pis. XIX., XX. 



1901. Bagg, R. M. Eocene Foraminifera. Md. Geol. Surv. Rept. 



1904. Bagg, R. M. Miocene Foraminifera. Md. Geol. Surv. Rept. 



1905. Bagg, R. M. Miocene Foraminifera of California. Bull. U. 

 S. G. S., no. 268. 



Synopsis of Important Genera and Species. 

 I. Peneroplis Montford. 



Shell a flattened cornucopia, with the small 

 end spirally enrolled and chambers extending 

 the entire width of the shell. Tertiary-Re- 

 cent. 



Recent. 



Fig. 7. Peneroplis 

 planafus, greatly en- 

 larged. 



i. P. planatus Montf. (Fig. 7.) 



II. Cristellaria Lam. 

 Shell regularly spiral . with coils completely enveloping one 

 another. Oral opening round. Trias-Recent. 



2. C. cultrata Montf. (Fig. 8.) Cret. -Recent. 3. C. cretacea 

 Bagg. (Fig. 9.) Cretacic. 



'"V 





-$■ 



1 





FlG. ga-l>, Crystellaria cretacea ; 



15, Anomalina ammonoides ; II, Verneuilina triquetra ; 



(all after Bagg), greatly enlarged. 



Crystellaria cultrata 



III. Textularia Defrance. 

 Chambers in two rows, alternating with each other and gradually 



