FORAMINIFERA— HERON-ALLEN AND EARLAND. 31 



3. Clavulina communis, d'Orbigny. 



4. Sagrina raphanus, Parker and Jones. 



5. ,, dimorpha, Parker and Jones. 



Nos. 1 and 3 are abundant in our Antarctic material, but the others do not 

 occur. 



Again Brady comments on the fact that the following forms occur in the 

 Arctic, while no representatives of these genera occur in the Antarctic : — 



1. Verneuilina polystfopha (Reuss). 



2. Bigenerina nodosaria, d'Orb. 



3. Spiroplecta biformis (P. & J.). 



4:. Polymorphina acuminata (d'Orb.). 

 5. ,, compressa, d'Orb. 



(J. Polymorphina Jactea (W. & J.). 



7. ,, oblonga, d'Orb. 



8. ,, rotundata (Born.). 



9. Operculina ammonoides (Gron.). 



But No. 1 appears in our Antarctic list with four other species of Verneuilina ; 

 No. 3 with another species, Spiroplecta annectens (P. & J.) ; No. 9 occurs, and 

 although only Nos. 5 and 8 are represented in our list of Polymorphmae, our 

 Antarctic species of that genus number eight, as against Brady's five from the 

 Arctic and none from the Antarctic. Possibly the most strikmg fact in the 

 comparison of the Polymorphinae lies in the entire absence of P. lactea (W. & J.) 

 from both Antarctic lists, though it figures at five out of six of the Arctic 

 Stations. It looks therefore as though P. lactea may be regarded definitely as 

 absent from the Antarctic. Operculina ammonoides (Gron.) occurs at several 

 Antarctic Stations. 



Among Brady's other deductions are : — 



1. That Uvigerina and Sagrina replace Polymorphina in Southern latitudes. 

 With this we cannot agree for reasons already given. 



2. That Clavulina (C. communis, d'Orb., understood) similarly replaces 

 Bigenerina, which appears to be correct. 



3. That the porcellanous forms display a more varied development in the 

 South than in the North. In support of this he lists twenty-foiir porcellanous 

 species, nineteen of which are Antarctic against ten in the Arctic list. There 

 are twenty-six porcellanous forms in our Antarctic list, including several species 

 not common to our own list and Brady's, so the deduction appears to be correct 

 if the Arctic list may be regarded as fahly complete. 



4. That the Northern region is much richer in — 



{a) The Tcxtularian types ; 

 {b) Polymorphinae ; 

 (c) Nonioninae. 



As regards {a) the deduction is based on a list of twenty-seven Textulariidae, 

 nineteen of which are recorded by Brady as Antarctic and only sixteen as 



