552 Transactions of the Society. 



mass of brownish protoplasm, which in a few instances shows signs 

 of breaking up into separate particles — perhaps the commencement 

 of the gem mule stage. Associated pairs have been observed, and, 

 as already mentioned, are sometimes linked together by a chitinous 

 investing membrane. 



Size. — Specimens measured varied between 0*50 and 1*50 mm, 

 in diameter. 



Thurammina pajpillata var. Jdspida var. nov. 



Plate XXX, fig. 7. 



Thurammina does not as a general rule present any evidence 

 pro or contra the vexed question of selective power, although the 

 sphere and haeusleri forms exhibit great skill in constructing agglu- 

 tinated tests, using sand-grains of uniform minute size. It 

 is, therefore, of considerable interest to record the occurrence of a 

 few isolated specimens utilizing sponge spicules as a protective 

 coating to the internal sandy sphere in the identical manner 

 adopted by Crithionina pisum var. hispida Flint. The few speci- 

 mens observed are all from one locality, Haul 228, 1600 metres. 



Thurammina pajpillata var. canaliculata (Haeusler). 



Type, Thuramminopsis canaliculata Haeusler (Refs. 11 and 21). 



Plate XXX, figg. 9, 10. 



We have already indicated our doubts as to the sub-generic 

 value of Thuramminopsis canaliculata, and shown how the author 

 of the type appears in his later ])aper to weaken somewhat in 

 his discrimination between Thuramminopsis canaliculata and 

 the abnormal conglomerations of Thurammina papillata. The 

 " Goldseeker " material furnishes no specimens presenting the 

 internal tube structure assigned to Thuramminopsis by Haeusler, 

 but we have many specimens of aberrant Thurammina associations 



EXPLANATION OF PLATE XXX. 

 riGfi. 

 1-6. — Thurammina papillata var. sordida var. nov. 



Fig. 1. — Chitinous sphere collapsed, showing filaments and attached 

 Globigerincs. 

 „ 2. — Sub-chitinous sphere, commencing to incrust. 

 „ 3. — Incrustation more advanced. 

 ,, 4, 5. — Spheres entirely incrusted. 



,, 6. — Sectional view (diagrammatic), to show concentric chitin 

 and mud envelopes. 

 7. — T. papillata var. hispida var. nov. 



8. — T. papillata var. haeusleri var. nov. Double specimen. 

 9. — T. papillata var. canaliculata Haeusler. 



10. — T. papillata var. canaliculata. Chamber of large specimen laid open, 

 showing internal papillse, which it is suggested represent the "tubes " 

 of Haeusler. 

 11. — T. papillata \a,r. elegantissima Haeusler. A colony of sessile individuals, 

 two being laid open. 



All specimens magnified 30 diameters. 



