42 HALKYARD, Fossil Foraminifera of the Blue Marl 



not the only resemblance between the two species, the internal 

 structure being" similar, as I have been able to verify from 

 mounted specimens. In the latter species however the internal 

 tube is of considerably greater diameter than in the former. 



(These again are B. selseyensis H-A. & E. large and 

 strongly developed, and not B. calcarata, Berthelin. the surface 

 of which is smooth apart from the spines along the base of the 

 chambers. Whilst it has been a matter of great satisfaction to 

 us to note these records of the extended distribution of our 

 species, we cannot help regretting that Halkyard should have 

 sacrificed his priority of discovery and authorship of the species 

 by postponing the publication of this paper.) 



Genus Gaudryina, d'Orbigny. 

 70. Gaudryina pupoides, d'Orbigny. 



Gaudryina pupoides, d'Orbigny, 1840, Mem. Soc. Geol. France 



(1) vol. IV, p. 44. pi. IV, figs. 22-24. 

 G. pupoides, Brady, 1884, Chall. Rep., p. 378, pi. XLVI, figs. 



1-4. 



This species is common in the Marl, and is generally elon- 

 gated in form, resembling rather the fossil specimens found 

 by d'Orbigny in the Paris Chalk than the recent ones of the 

 "Challenger" and other collections. 



71. Gaudryina rugosa, d'Orbigny. 



Gaudryina rugosa, d'Orbigny, 1840, Mem. Soc. Geol., France 



(1), vol. IV, p. 44, pi. IV, figs. 20, 21. 

 G. rugosa, Brady, 1884, Chall. Rep., p. 381, pi. XLVI, figs. 



14-16. 



Another common species, more robust and of rougher 

 texture than the last-named form, and further distinguished 

 from it by being triangular in transverse section. The species 

 is very generally distributed throughout the soft beds, but no 

 specimens were found in the washings from No. 1 gathering 

 1893. 



72- Gaudryina rugosa, var. difformis, nov. 

 PI. II, figs. 7-9. 



This variety differs from its type species in the following 

 particulars. It is smaller, more slender, with more compact 

 chambers, the sutures are not excavated, but only represented 

 by fine lines, the texture is comparatively smooth, and the later 



