330 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



PULVINULINA OBLONGA (Williamson). 



Rotalina oblonga Williamson, Recent Foraminifera of Great Britain, 1858, p. 51, 



pl.4, figs. 98-100. 



Pulvinulina oblonga H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 688, pi. lOG, figs. 4a-c. 



A specimen which it seems can be referred to this species was found 



at a single station in the area — D5220, between Marinduque and 



Luzon, 50 fathoms (91 meters). It was very rare at this station, 



however. 



Pulvinulina oblonga — Material examined. 



PULVINULINA SCABRA H. B. Brady. 



Plate 58, figs. 3a, b. 



Pulvinulina oblonga (Williamson), var. scabra H. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 689, pi. 106, figs, 8a-c.— Cushman, Bull. 71, 

 U. S. Nat. Mus., pt. 5, 1915, p. 53, pi. 27, fig. 5. 



From an examination of a considerable series of this form it seems 

 that it is worthy of specific rank. Typical P. oblonga seems to be 

 rare as far as the material I have had shows, although Brady ap- 

 parently had material from the Philippines in 95 fathoms (174 

 meters) which he referred to it. On the other hand, P. scabra, 

 while not frequent, does appear at a number of stations and at some 

 in very considerable numbers. The specimens are very constant in 

 their characters and agree very closely with those of Brady. 



Sidebottom refers to specimens from off Cebu,^^ and speaks of the 

 fact that all his specimens showed the earlier chambers to be flat or 

 concave, while in the figures given by Brady they seem to be some- 

 what convex. In the Philippine material I have seen they are flat- 

 tened and then become convex in later chambers. The ventral side 

 in one form is very much like that given by Brady, except that it is 

 rather more roughened, and is thereby easily distinguished from 

 Discorbis ventricosa, which occasionally occurs at the same station. 

 In the latter species also the ventral side is much more convex and 

 the umbilical region has a large cavity. The scabrous condition in 

 the two is also very different in its characters. 



Pulmnulina scabra occurs at stations represented by the following 

 locaUties: China Sea, off southern Luzon; between Marinduque and 

 Luzon; off Romblon; and Sulu Sea, off western Mndanao. It was 

 not found in the region to the south of the Archipelago. 



" Mem. and Troc. Manchester Lit. and Philos. Soc, vol. 63, No. 21, lfl09, p. 6. 



