KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 4. 71 



c) striata vel costulata: 



8yn. Bolivina plicata D'OBB., 1843, Voy. Am. mer. 5, p. 62, t. 8, figg. 4 7. 



MOB., 1880, Beitrage z. Meeresfaun. Mauritius u. Seychell. p. 95, t. 9, figg. 



1213. 

 pusilla SCHWAG., 1866, For. Kar.-Nikobar; Novara Reise, geol. Th. 2. 2, p. 254, 



t. 7, fig. 101. 

 ? plicata BRAUY, 1870, Brack, water foram.; A. M. N. H. (4) 6, p. 302, t. 12, fig. 7 



(an B. costata D'ORB.). 

 Grammost. sulcatum EHRENB., 1854, Microgeol. t. 20, fig. 9. 



Bulimina pimctata var. decurrens EHRENB. 



Tab. IV, fig. 127. 



A handsome form not uncommon on the chalk-bottom and of pretty good size. 

 It may be more allied to Bui. squamosa than to punctata. 



Fig. 127: Bui. punctata var. decurrens; 1276.: the same more magnified. 



Syn. Grammost. decurrens EHRENB., 1854, Microgeol. t. 30, fig. 17. 



Bolivina decurrens MARSS., 1877, Rugen. Schreibekr.; Greifsw. Nat. Verein. Mitth. 18771878, 



p. 156, t. 3, fig. 24. 

 Beyrichi Rss., 1851, Sept. Thon Berlin; Zeitschr. deutsch. geol. Ges. 3, p. 83, t. 6, 



fig. 51. 

 ? Beyrichi HKEN., 1875, For. Clav. Szab. Sch. p. 64, t. 7, figg. 1112. 



Bulimina costata D' 



Tab. IV, figg. 129132. 



Although our form exhibits some differences from Bolivina costata D'ORB. in 

 being more closely ribbed and having the costaa often produced to short spines, parti- 

 cularly on the edges as in *Btdim. inflata SCHWAG. , it cannot be entitled to 

 rank of distinct species. It is more or less compressed; the pores are of the same 

 size and scattered disposition as is often found in Bui. punctata D'ORB. In its outlines 

 it often has some resemblance to Sagrina pulchella D'ORB. The aperture is very nar- 

 row and difficult to bring into view. 



It is very common in the chalk-ooze, always of a pigmy size. 



Fig. 129: very small specimen, highly magnified. 



Fig. 130: more developed. 



Fig. 131: edge view of the same; 132: apertural side. 



Syn. Bolivina costata u'Oni)., 1839, Voy. Amer. mer. p. 62, t. 8, figg. 89; 1846, For. Bass. 



tert. Vienne p. 239, t. 21, figg. 44 45. 

 Bulimina Presli var. Boliv. costata PARK, and JONES, 1865, N. Atl. and Arct. Oe.; Phil. Transact. 



155. 1, p. 376, t. 17, fig. 75. 



? Bolivina subangularis BRADY, 1881, Notes on retic. Rliizopod.; Q,u. Journ. Micr. Sc. (N. Ser.) 81. 



p. 59. 



