198 Transactions. — Zoology. 



Innumerable mutations of the following species are met 

 with : — Miliolina circularis, Born. ; M. semimdum, Lin. ; M. 

 oblonga, Mont. ; M. lalnosa, D'Orb. ; M .secans,'D'Oxh. ; M.hicorvis, 

 W. and T. ; M. Unnaana, D'Orb. To which we can add, as dis- 

 tinct varieties : — M. aucldandica and M. xiolymoryha. 



4. Gen. Spiroloculina. 



Small specimens, occupying an intermediate place between 

 Miliolina [QuinquelocuUna) and Spiroloculina. 



5. Gen. Ehabdammina. 



Fragments of monothalamous arenaceous tubes, belonging, 

 probably, to a large species of the AstrorhizidcB group (var. of 

 Rh. abyssorwn ?). 



6. Gen. Keophax. 



Irregular, dentaline modifications of R. scorpiurus, Mont., 

 with dark grey, calcareous cement. 



7. Gen. Haplophragmium. 



Small, finely arenaceous, colourless, and ochreous forms of 

 H. canariense, D'Orb., and H. glohiga-ini/orme, P. and T., similar 

 to those found in the North Atlantic and in some mesozoic 

 strata (zone of Ammonites transvcrsariiis, etc.). 



8. Gen. Thueammina. 



Delicate, spherical tests of Th. papillata, Brady, with short 

 papillae distributed regularly all over the surface, resembling 

 the passage forms of Th. albieuiis and Th. j^apillata fi-om the 

 upper Jurassic strata. 



9. Gen. Valtulina. 



Finely arenaceous, much compressed specimens of T'. conica, 

 P. and T., almost isomorphous with TrocJuimmina squamata. 



10. Gen. Bolivina. 



Very rare, delicate, glassy modifications of B. punctata, 

 D'Orb. 



11. Gen. Lagena. 



Four species of the groups Lavigatcp. and Reticulata:. The 

 absence of the cosmopolitan L. globosa, L. lan's, L. marginata, and 

 L. sulcata, so common in British littoral deposits, is a curious 

 fact. 



12. Gen. Globigerina. 



Small ash-grey specimens of G. bulluidee, D'Orb. 



18. Gen. Patellina. 



Two young shells of P. cornigata, Will. 



