ROTALIINAE 43i 



The Type tube in the Paris collection contains two specimens, which are in them- 

 selves evidence that the collection has been mishandled by some curator without much 

 knowledge of the subject. One of them is Rotalina {Piilvimdina) patogonica, a very 

 good specimen comparable with d'Orbigny's figure. The other is an equally good 

 specimen of Rosalina (Discorbina) peruviana. 



389. Pulvinulina consobrina (d'Orbigny). 



Rosalina consobrina, d'Orbigny, 1839, FAM, p. 46, pi. vii, figs. 4-6. 



One station: WS 83. 



At this station a specimen was found which seems to be referable to d'Orbigny's 

 Rosalina consobrina, originally described from the Peruvian coast. The specimens in 

 the Type tube in Paris appear to be of varied origin and none agree very closely with 

 d'Orbigny's figures. It is possible that other specimens have been overlooked owing to 

 their general similarity to P. karsteni. 



390. Pulvinulina alvarezii (d'Orbigny) (Plate XV, figs. 23-25). 

 Rotalina alvarezii, d'Orbigny, 1839, FAM, p. 35, pi. i, fig. 21 ; pi. ii, figs, i, 2. 



Two stations: WS 87, 89. 



D'Orbigny's species was described from Patagonia and the Falkland Islands as "very 

 rare". Our specimens are assigned with some hesitation to this species, as his figures 

 are apparently conventionalized, especially that showing the inferior or oral surface. It 

 seems probable that the species represents only a transition form between P. karsteni 

 and P. peruviana. The Type so designated could not be found in Paris as such, but in a 

 tube labelled ''Rotalina ungeriana (Baden-Vienne) " are four shells, three of which are 

 in good condition, and which agree quite well with d'Orbigny's figure, ut supra, and 

 may perhaps be the missing Types. 



391. Pulvinulina karsteni (Reuss) (Plate XV, figs. 26-36). 



Rotalia karsteni, Reuss, 1855, KKM, p. 273, pi. ix, fig. 6. 



Pulvinulina karsteni, Brady, 1864, RFS, p. 470, pi. xlviii, fig. 15; 1884, FC, p. 698, pi. cv, 



figs. 8, 9. 



Pulvinulina karsteni, Heron-Allen and Earland, 1916, FWS, p. 276, pi. xlii, figs. 34-7. 



Pulvinulina frigida, Cushman, 1922, FHB, p. 12. 



Thirty-four stations : 48, 51, 53; WS7i,73, 76, 77, 79,80, 83,86,87,88,89,90,91, 92, 93, 95, 

 96, 97, 98, 108, 109, 210, 213, 215, 217, 219, 221, 225, 245, 246, 248. 



Almost universally distributed and often very abundant. The best and most typical 

 at WS 86, 87, 88, 210. The species is subject to great variation. Reuss's species was 

 from the Chalk of Mecklenberg, and the recent specimens are generally more in agree- 

 ment with the figures of Brady, which indicate an organism with a more flattened base. 

 Cushman {ut supra) has suggested the separation of the recent forms under the name of 

 P. frigida, but in view of the great range of variation which we have observed in the 

 Falkland material, we have no hesitation in continuing to use Reuss's specific name to 

 cover the group. 



