22 HALKYARD, Fossil Foraminifera of the Blue Marl 



37. [Nouria polymorphinoides, Heron-Allen & Earland.] 



[Nouria i) olymorphinoides , Heron- Allen & Earland, 1914, etc., 

 F.K:A.; p. 376, pi. XXXVII, figs. 1-15.] 



37A. Reophax polymorphinoides, sp. nov. 

 PI. I, figs. 6, 7. 



Test elongate, compressed, consisting of an aggregation 

 of compressed sub-discoidal chambers arranged in such a man- 

 ner as to bear a strong external resemblance to Polymorphina. 

 Texture roughly arenaceous. Length, 1.4 to 2.7 mm. Breadth, 

 .82 to 1. 15 mm. 



This species is not very rare in the Blue Marl. Its form 

 is rather variable, sometimes it occurs with characteristics as 

 well marked as those here figured but quite as many examples 

 are found which are by no means easy to identify, as they 

 appear externally to be only fortuitous agglomerations of 

 particles of quartz, and can only be recognised by the company 

 in which they are found. It will be seen from fig. 7 that in 

 the immature stage <the test is an arenaceous isomorph of 

 Polymorphina problema, d'Orb., whilst later it assumes more 

 of the character of P. compressa d'Orb. Unfortunately, I 

 have not been able to make out the position and form of the 

 oral aperture. 



(Halkyard's specimens are clearly referable to our genus 

 Nouria (ut supra), and probably to our species N. polymor- 

 phinoides of the large type found at Kerimba. They differ in 

 their rougher and less finished construction and in the greater 

 compression of the test, but this compression is variable in the 

 Biarritz specimens and is probably due to pressure in the fossil- 

 ization. For taxonomic purposes it may perhaps be advisable 

 to separate the Biarritz specimens as a variety N. polymor- 

 phinoides var halkyardi.) 



r. ■ 



Genus Haplophragmium, Reuss. 

 ■38. Haplophragmium agglutinans (d'Orbigny.) 



Spirolina agglutinans, d'Orbigny, 1846, Foram. Fossiles 



Vienne, p. 137, pi. VII, figs. 10-12. 

 Haplophragmium agglutinans, Brady, 1884, Chall. Rep., p. 301, 



pi. XXXII, figs. 19-26. 



Rather rare, stout in form and coarsely arenaceous in 

 texture. 



(The specimens are all of a large and roughly agglutinate 



