140 FORAMINIFERA OF THE CRAG. 



1. Webbina hemisph^kica, Jones, Parker, and Brady. Plate IV, fig. 5. 

 Part I, 1866, p. 27 ; Appendix II, Table, No. 23. 



Webbina heuisph^eica, J., P., and S., 1866. Monogr. Foram. Crag, p. 27, pi. iv, 



fig. 5. 



— — J5;Wy, 1884. Eeport ' Challenger,' p. 350, pi. xli, fig. 11. 



— — JEffffer, 1S93. Abhandl. k. Bayer. Akad. Wiss., vol. xviii, 



Abtb. 2, p. 226, pi. xiv, figs. 1—3. 



This form, represented in 1866 by one specimen from the Crag of Sutton, was 

 regarded as variety hemispliasrica of Webbina irregularis, d'Orb., which Parker and 

 Jones looked upon as belonging to a sub-type of their Trochammina, which also 

 comprised some forms since referred to Ammodiscus. 



Occurrence. — Webbina hemisphserica, first described in the First Part of this 

 Monograph, has since then been found in the living state in shallow water (twenty- 

 five to thirty-three fathoms) at two points off the coast of Durham, by G. S. Brady 

 and D. Robertson ('Report Brit. Assoc' for 1875, pp. 188, 189); and by the 

 'Gazelle' at 69 metres off the Cape-Verd Islands. The Crag specimen was 

 obtained from Sutton. 



It may be mentioned that the specimens which have been recorded as Webbina 

 from the Lias probably belong to Nubecularia. 



Note. — In Part I (1866) the Lagenidse followed here, but it is now more 

 convenient to take in order others of tlie arenaceous grouj?, so called, although 

 they are hyaline when young. 



Family 2.— TBXTILARIID^.^ 



Brady, Report ' Challenger,' 1884, pp. 67 and 354. 



General Gharacters. — Tests of the larger foi'ms arenaceous, either with or 

 without a perforate calcareous basis ; small forms hyaline and perforate. 

 Chambers arranged in two or more alternating series, or spiral, or confused ; 

 often dimorphous, comprising the Textilariinx and Bulimininx. 



1 The genera Textilaria, Bulimina, and Cassidulina were placed in the midst of the Hyaline 

 Foraminifera in Part I of this Monograph, — see the tables in the Appendices I and II. As their shell 

 is " perforate," and as its sandy condition is not present in all the forms, and therefore is not an 

 essential feature, Textilaria and Bulimina are in this respect intermediate to the Arenaceous and 

 Hyaline groups, and (with their Hyaline sub-genera) may be placed last iu order among the former, or 

 first among the latter, thus coming between the Liticolidse and the LageniJve. 



