GLOBIGERINIDAE 403 



and typical (identical with the Type specimens in Paris), except at WS 409, which, 

 although beyond the Continental Shelf, is near the Falkland Islands. Here the speci- 

 mens are small and similar to those found upon the Shelf. 



316. Pullenia subcarinata (d'Orbigny) (Plate XIII, fig. 14-18). 



Nonioniiia subcarinata, d'Orbigny, 1839, FAM, p. 28, pi. v, figs. 23, 24. 

 Noiiioniua quiiiqiicloba, Reuss, 1851, FSUB, p. 71, pi. v, fig. 31. 

 Pullenia quinqueloba, Brady, 1884, PC, p. 617, pi. Ixx.xiv, figs. 14, 15. 



Twenty-seven stations: 48, 51, 228, 236, 388; WS 71, 72, 76, 80, 84, 86, 88, 90, 91, 93, 97, 98, 99, 

 109, 210, 215, 217, 225, 245, 248, 408, 433. 



Often very common and attaining a very large size, the best being at WS 71, 76, 84, 

 88 and 91 . At WS 84, there was an extraordinary amount of variation in the inflation of 

 the chambers and lobulation of the peripheral edge. 



D'Orbigny's species Nonionina subcarinata was described from the Falklands where 

 he says it is not uncommon. It appears to have been entirely overlooked by subsequent 

 authors, as we cannot trace any reference to the species, even in the synonomies of the 

 subsequently created, and generally accepted, Nonionina quinqueloba, Reuss, 1851. It 

 must not be confused with Nonionina subcarinata, Seguenza (S. 1862, RFC, p. 98, pi. i, 

 fig- 3)' which, although also a Pullenia, is quite distinctive, having an inflated umbilical 

 region and ten visible chambers. 



Pullenia subcarinata (d'Orbigny) is characterized by the possession of six visible 

 external chambers and a somewhat inflated shell. Both of these characters are subject 

 to great variation and we are unable to recognize any specific distinction between it and 

 P. quinqueloba. The Falkland specimens show every gradation between the figures of 

 Reuss and those of d'Orbigny and, much as we dislike to replace a name which has been 

 generally accepted, we think that under the law of priority the name P. quinqueloba 

 (Reuss) must be regarded as a synonym of P. subcarinata (d'Orbigny). As the records 

 stand, there is no doubt that many of the records of P. quinqueloba were made from, or 

 include specimens of P. subcarinata. Several authors refer to the variable number of 

 chambers in their specimens ; Brady included (B. 1884, FC, p. 617, pi. 84, fig. 15) a figure 

 which might have been copied from d'Orbigny 's. 



The size is very variable at difl^erent stations, ranging up to 070 mm. in diameter, and 

 0-40 mm. in thickness. 



Although the six-chambered d'Orbignyan type is dominant nearly everywhere, five- 

 chambered shells of the quitiqueloba type only were noted at WS 80 and 245. Also at 

 228, 236 and WS 408, where the only specimens were few and very small. As these 

 stations are ofl^the Continental Shelf it would seem possible that the depth of water may 

 have an influence on the number of chambers formed. It would seem desirable to take 

 special notice of this feature in the examination of deeper water collections. 



There are two Type tubes in Paris, one labelled " Amerique meridionale " containing a 

 single six-chambered specimen. In the other, labelled "lies Malouines", there are five 

 specimens, two of which are so mounted that the chambers cannot be counted, and of 



DIV J5 



