536 Transactions of the Society. 



it would therefore appear from Haeusler's own admissions, coupled 

 with our examination of a series of abnormal recent specimens, 

 that his sub-genus Thuramminopsis has little, if any, value from a 

 biological point of view, and that T. canaliculata should properly 

 be regarded merely as an extreme modification of T. jiapillata. 



In addition to the species already described by himself and 

 Brady, Haeusler in this paper describes and figures two new 

 species : (1) T. elegantissima, characterized by the possession of 

 semi-globular shaped chambers attached to a base of finely arenaceous 

 texture, and with a thin glassy shell-wall, which, according to the 

 figure, we should prefer to describe as an agglomeration of simple 

 semi-globular chambers, destitute of actual papillae; and (2) 

 T. tuherosa, which had already been referred to as a nomen nudum 

 in 1882 (Ref. 7, p. 227), and in 1885 (Ref. 13, p. 4). The latter 

 is described as " a characteristic form directly connected with the 

 large irregular deeply constricted varieties of T. papillata, differing 

 from it in the shape of the chambers, each of which bears two 

 papillse placed opposite to one another; the sausage-shaped chambers 

 are grouped in a distinctive manner which is only more or less 

 coherent. In only a single case were more than two papillae 

 observed on a single chamber." Haeusler's figures represent an 

 agglomerated mass of individuals of T. papillata with few but 

 abnormally developed papillae. 



EXPLANATION OP PLATE XXVII. 



PIGS. 



1. — Thurammina papillata. Sessile specimen, attached to tube of Hyper- 



ammina ratnosa Brady = T. hemisphierica Haeusler. 

 2. — T. papillata var. compressa Brady. Specimen with test of cement, 



metallic copper colour. 

 3. — Ditto. Specimen with test of grey micaceous mud ; no papillae. 

 4. — Ditto. Specimen with test built of plates of mica attached to chitinous 



envelope. 

 5. — Ditto. Finely arenaceous test. 

 6. — Ditto. Finely arenaceous test. Specimen with double marginal ring of 



papillas separated by groove. 

 7. — Edge view of fig. 6. 

 8. — Finely arenaceous specimen, with honeycomb surface ornament. (Cf. 



var. favosa Flint.) 

 9. — T. papillata. Oval form. Large coarsely arenaceous specimen. (Of. 

 Brady (Ref. 12), pi. xxxvi. fig. 8.) 

 10, 11. — Abnormal oval specimens, with cement tests and imperforate papillae. 



Colour, metallic copper. 

 12, 13. — Oval forms in copper-coloured cement ; imperforate papillae. 



14. — T. papillata vsli. parallela var. nov. Specimen with test of chocolate- 

 coloured cement ; imperforate papillae. 

 15. — Ditto. Test largely micaceous. 

 16, 17. — Ditto. Specimens with fine and coarse arenaceous tests. 

 18, 20. — T. papillata. Forms with few and abnormally developed papillae. (Cf. 

 Brady (Ref. 12), pi. xxxvi. fig. 10 ; and Haeusler (Ref. 21), pi. vi. figs. 

 12, 13, 16, 23, 25, 26.) 



All specimens magnified 45 diameters. 



