Manchester Memoirs, Vol. Ixii. (191 7) 45 



triserial portion of the shell much resembles that of Tritaxia 

 caperata, Brady. 



(This is Uvigerina selseyensis H-A. & E. small, but quite 

 typical.) 



78. [Uvigerina selseyensis, Heron- Allen & Earland.] 



78A. Tritaxia elongata, sp. nov. 



PI. Ill, fig. 9. 



Test vitreous, elongate, parallel-sided, aboral end pointed, 

 section triangular, angles rounded. Arrangement of chambers 

 at first tri-serial, afterwards bi- and finally uniserial. Aperture, 

 a short neck with phialine lip. Length .32 to .45 mm. 



This form is frequent and might also be called common in 

 our gatherings. One of its distinguishing features is the 

 presence of hollows or excavations on the sutural lines, these 

 are partly formed by the folding of the chamber-walls and partly 

 by a tendency to backward prolongation of the sutural margin 

 of the chamber, such as is seen in Tritaxia dehiscens. The draw- 

 ing here given does not show this feature in its fullest develop- 

 ment but represents an average specimen. In weak specimens 

 the test is much elongated and is more circular in transverse 

 section than in typical examples. 



(This appears to be nothing more than an elongated form 

 of U. selseyensis H-A. & E. in which the characteristic project- 

 ing and undercut chambers are narrower compared with the 

 length, of the shell. It is possible that the short and long forms 

 may represent the dimorphism of the species.) 



78B [Tritaxia lepida, Brady.] 

 [Tritaxia lepida, Brady, 1879, etc., RRC. 1881. p. 55. 

 T. lepida, Brady, 1884, FC. p. 389, pi. XLIX, fig. 12.] 



Genus Clavulina, d'Orbigny. 

 79. Clavulina cylindrica, Hantken. 



Clavulina cylindrica, Hantken, 1875, Mitth. Jahr. k. ung. geol. 



Anst., IV, pt. I, p. 18, pi. I, fig. 8. 

 C. cylindrica, Brady, 1884, Chall. Rep., p. 396, pi. XLVIII, 



figs. 32-38. 



Frequent; the majority of the specimens are not large, 

 though a few of respectable dimensions were found. The 

 largest measures 1/7 inch in length. 



