674 MESSES. E. HERON-ALLEN' AND A. EAELAND ON THE 



and typical, resembling Sidebottom's figures 3 and 5. The affinities of the species 

 are, as the author says, " very puzzling." One feature which is characteristic of 

 the Kerimba specimens, and which is also evident in some specimens from Delos 

 given us by Sidebottom, and which is suggested in his figure 5 a (but is not 

 referred to in the text), is the presence of a series of secondary apertures on the edge 

 of each chamber close to the septal lines. They appear to be perforations passing 

 through the shell, and closely resemble the similar openings in Candeina nitkla 

 d'Orbigny. When the test of P. complexa is broken it exhibits a " postage stamp 

 fracture " along this line of perforations. All the Kerimba specimens have a cribrate 

 aperture as in the Delos examples, but this does not appear to be an area irregularly 

 perforated with many apertures as in the type-figures, but merely a curved line 

 carrying the marginal perforations round the looped edge of the terminal chamber, 

 where the penultimate chamber projects into it. The texture of the Kerimba shells 

 is more hyaline than that of the Delos specimens, which are described as being of a 

 " very delicate pale ivory, and .... they are generally semi-transparent." The 

 Kerimba specimens are finely punctate and suggestiv-e of the thin hyaline shell of 

 Bidimiiia ovata d'Orbigny. The question as to whether this species should remain 

 in the genus Polymorpliina or whether it should be transferred to Candeina, or even to 

 a new genus, must stand over until the point can be decided by the study of a larger 

 number of specimens. 



UviGERiNA d'Orbigny. 



301. TTvigerina auberiana, var. glabra Millett. 



Uvigerina auberiana d'Orbigiij', 1839, FC. p. 106, pi. ii. figs. 23, 24. 

 „ Goes, 1882, RRCS. p. 60, pi. iv. figs. 71-75. 

 auberiana, var. glabra Millett, 1898, etc., FM. 1903, p. 286, pi. v. figs. 8, 9. 

 „ „ „ „ Sidebottom, 1904, etc., RFD. 1908, p. 2, pi. i. figs. 5, 6. 



11 Stations. 



This variety is the only characteristic and widely distributed representative of the 

 genus Uvigerina occurring in the Kerimba dredgings. It occurs in varying numbers 

 at practically all the Stns., and presents but little variation except in the surface- 

 texture of the shell, which is, as a rule, quite smooth, but is faintly hispid at Stns. 5, 6, 

 and 7. At Stn. 7 the hispid decoration is arranged in regular lines, giving a sub- 

 striate appearance to the test. At Stn. \ X the uvigerine chambers are almost entirely 

 suppressed, the test being biserial throughout. There is considerable divergence in 

 the length of the specimens, most Stns. furnishing examples of two kinds, (i.) short and 

 broad, and (ii.) long and narrow. This divergence appears to be due to the extent of 

 the uvigerine development. 



