66 HALKYARD, Fossil Foraminifera of the Blue Marl 



136A. [Nodosaria simplex, Silvestri.] 



[Nodosaria simplex, Silvestri, 1872, NFVI, p. 95, pi. XI. figs. 



268-272. 

 N. simples, Brady, 1884, FC p. 496, pi. LXII. figs. 4, 5 and ?6.] 



137. Nodosaria (Dentalina) siliqua, Reuss. 



Dentalina siliqua, Reuss, 1862 (1863), Sitz. k. Ak. Wiss. Wien, 

 vol. XLVI, (1), p. 40, pi. II, fig. n. 



This variety of N. radicula is rather rare, and in these col- 

 lections is generally somewhat irregular or distorted in growth. 



138. Nodosaria (Dentalina) plebeia, Reuss. 



Dentalina plebeia, Reuss, 1855, Zeitschr. deutsch. geol. Ges., 



vol. VII, p. 267, pi. VIII, fig. 9. 

 Nodosaria plebeia, Brady, 1884, Chall. Rep., p. 502, pi. LXIII 



fig. 2. 



A compactly built form which differs only from N. roemeri, 

 Neug. in having directly transverse sutures in place of oblique 

 ones. Rare at Biarritz. 



139. Nodosaria (Dentalina) communis, d'Orbigny. 



Dentalina communis, d'Orbigny, 1826, Ann. Sci. Nat., vol. VII,. 



p. 254, No. 35. 

 Nodosaria communis, Brady, 1884, Chall, Rep., p. 504, pi. 



LXII, figs. 19-22. 



Frequent, varying in form from a delicate many-chambered 

 shell with an acuminate commencement, to a stout shell with 

 few segments and a globular primordial chamber. 



(A very fine and extensive series of specimens covering 

 all possible variations of the type.) 



140. Nodosaria (Dentalina) mucronata, Neugeboren. 



Dentalina mucronata, Neugeboren, 1856, Denkschr. k. Ak. 



Wiss. Wien, vol. XII, (2), p. 83, pi. Ill, tigs, 8-1 1. 

 Nodosaria mucronata, Brady, 1884, Chall. Rep., p. 506, pi. 



LXII, figs. 27-29; monstrous specimens figs. 30, 31. 



Rather rare but well distributed. The specimens are gener- 

 ally slender and elongate, and approach N. communis. 



