116 FORAMINIFERA OF THE CRAG. 



Spiroloculina impressa, 1 Brady, 1884. ' Challenger ' Report, p. 151, pi. x, 



figs. 3, 4. 

 Egger, 1893. Abhaudl. k. Bayer. Akad. Wiss.,cl. ii, 

 vol. xviii, p. 224, pi. i, figs. 35, 36. 



(4) Besides the Spirolocnlinse enumerated with foregoing lists, Mr. Millett 

 observes that there are many which agree with some of the others in certain 

 respects as regards the shape of the whorls, but are variously ornamented, and 

 therefore worthy of separate consideration. Some also are arenaceous. 



There remain some others which do not readily fall into this classification. 



Genus 3. — Miliolina, Williamson, 1858. 



Part I, 1866, page 4 (Miliola, Lamarck, 1804). See also Brady, Report 

 ' Challenger,' 1884, pp. 156—182. 



General Character*. — Originally intended by Williamson to comprise the three 

 forms — Triloculina, Quinquelorulina, and Adelosina — we still find it convenient to 

 retain Miliolina on account of the close relationship found to exist between these 

 forms as to both external and internal characters. The interesting peculiarities 

 of their structure, as elaborated by MM. Munier-Chalmas and Schlumberger, are 

 alluded to in some detail above at pages 91, 92. 



1. Miliolina seminulum (Linne). Plate III, figs. 35, 36. 

 Part I, 1866, page 9 ; and Appendix II, Table, No. 9. 



Additional Synonyms : 



Quinqueloculina seminulum, J., P., and B., 1866. Monogr. For. Crag., p. 9, 



No. 1, pi. iii, figs. 35, 36. 

 Miliolina seminulum, Hartivig, 1866. The Sea, 3rd edit., p. 381, fig. g. 



Cooke, 1869. Thous. Objects Micr., p. 93, pi. ix, fig. 21. 



Chimwio, 1870. Bed of Atlantic, p. 19, pi. iv, fig. 2. 



Greene, 1871. Mauual Protozoa, p. 15, fig. 3, g. 



1 SpirolocvliiHt impressa, with the outer margin channelled, comes also under the quasi-specific 

 group of Sp. canaliculata (see p. 108), thus furnishing a striking example of the intercommunity of 

 Foraminiferal forms ; so also our PI. Ill, figs. 39, 40, referred to above. Other instances of one 

 " species " showing the characteristics of another may be pointed out. 



