28 BULI.ETIN TO 332 



Transverse se(5lions are elliptical and show in some forms an 

 angular periphery and when so approaching C^'istellaria dec- 

 orata Reuss, in outline. Another closely allied form is seen 

 in Marginulina hochstetteri Stache, which has the tubercles de- 

 veloped but lacks the costse and chamber decoration. Aperture 

 round and situated at the end of a somewhat prolonged neck; 

 length 1.56 mm., breadth 0.50 mm. 



This highly ornamented Cristellaria was also found by the 

 author in the Cretaceous of New Jersey but it is rare. In 

 the material from the well boring at Crisfield there are many 

 of this species at a depth of 776 feet. 



Horizon and locality .- — Miocene?; Crisfield, Md. Well boring; 

 depth 776 feet. 



Geological distribictio7i. — Cretaceous to Recent. 



Genus POLYMORPHINA d'Orbigny. 



Polymorphina amygdaloides. 



Syn. Polymorphina amygdaloides Reuss, Sitzungsb. Akad. Wiss. Wien, 

 vol. xviii, p, 250, pi. viii, fig. 84, 1855. 

 Polymorphina amygdaloides Bagg, Bull. U. S. Geol. Surv., No. 

 141, p. 91, 1896. 



Test ovoid, flatly compressed upon one side, somewhat covex 

 upon the other; anterior end acute, posterior obtusely round- 

 ed; chambers three or four elongated, alternating, not all e- 

 qually depressed, septal lines somewhat depressed, especially the 

 longest. The surface is smooth and glistening; length 0.35 mm. 



The above form is not typical for the species, being more 

 unsymmetrical than usual owing to the prominence of one of 

 the lateral chambers. According to Messrs. Brady, Parker and 

 Jones, this species is very variable in form and includes such 

 varieties as Polymorphina minuta Roemer, Polymorphina guttula 

 Reuss, Polymorphiria depatiperata Reuss, etc. 



Horizon and locality. — Eocene; Pamunkey river, Va. 



Geological distribution. — Tertiary to Recent. 



Polymorphina austriaca. 



Syn. Guttulina austriaca d'Orbigny, Foram. Foss. Vien., p. 223, pi. xii, 

 figs. 23-25, 1846. 

 Polymorphina austriaca Bagg, Johns Hopkins Univ. Circulars, vol. 

 XV, p. 5, 1895. 

 Test oviform, smooth, moderately compressed, acuminate an- 

 teriorly, consisting of four chambers which are oblong, oblique 



