246 CRETACEOUS PALEONTOLOGY. 



1884. Cristellaria wetherellii Brady, Chal. Kept., vol. ix, p. 537, 



pi. cxiv, fig. 14. 

 1898. Cristellaria wetherellii Bagg, Bull. U. S. G. S., No. 88, 



P- 59- 

 1898. Cristellaria utetfierellii'Bagg, Bull. Am. Pal., vol 2, No. 



10, p. 27 (321). 

 1904. Cristellaria wetherellii Bagg, Md. Geol. Surv., Miocene, 



P- 475, Pi- 132, fig. 16. 



Description: "Test elongate, pod-like, compressed; primordial 

 segments spiral, ultimate segments straight, evolute; surface 

 marked by large tubercles more or less regular and crossing the 

 shell surface like septal ridges ; aperture round, at the end of a 

 somewhat prolonged neck. 



"Length, 1.56 mm.; breadth, 0.5 mm." (Bagg.) 



Remarks. "The above species is rare at Vincentown. Dr. 

 Woodward states that it is rare at Mullica Hill, but common 

 at Timber Creek." (Bagg.) 



Formation and locality. Vincentown limesand, Vincentown, 

 Mullica Hill, Timber Creek (Bagg). 



Geographic distribution. New Jersey ; Miocene of Maryland. 



Genus FLABELUNA d'Orbigny. 

 Flabellina cordata Reuss. 



1845. Flabellina cordata Reuss; Verstein. bohm. Kreide, pt. i, 



p. 32, pi. viii, figs. 37-46, 78. 

 1854. Flabellina, cordata Reuss, Denks. Akad. Wiss. Wien, vol. 



vii, p. 67, pi. xxv, figs. 6-8. 

 1898. Flabellina cordata Bagg, Bull. U. S. G. S., No. 88, p. 59. 



Description. "Test broadly ovate or heart-shaped, compla- 

 nate, with numerous narrow, elongated chambers; primordial 

 chamber somewhat elevated and more or less globular, succeed- 

 ing chambers at first flabelline, later Frondicularia-like ; anterior 

 extremity wedge-like with gently curving sides, posterior border 

 much wider than in Flabellina sagittaria and differing from that 

 species in the irregularity of the basal margin caused by the 



