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

 c) striata vel costulata: 

 Syn. Bolivina plieata 



71 



d'Orb., 1843, Voy. Am. mer. 5, p. 62, t. 8, figg. 4—7. 



MÖB., 1880, Beiträge z. Meeresfaun. Mauritius u. Seycliell. p. 95, t. 9, figg. 



12—13. 

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



t. 7, fig. 101. 

 Brady, 1870, Bräck, water foram.; A. M. N. H. (4) 6, p. 302, t. 12, fig. 7 



(an B. oostata d'Orb.). 

 Grammost. sulcatum. Ehrenb., 1854, Miorogeol. t. 20, fig. 9. 



» pusilla 

 ? « plieata 



Buliinina pimctata var. decurreiis Ehrenb. 



Tab. IV, fig. 127. 



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

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



Fig. 127: Bul. punctata var. decurrens; 127 6.: the same more magniiied. 



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



Bolivina decurrens Maess., 1877, Riigen. Schreibekr.; Greifsw. Nat. Verein. Mittli. 1877—1878, 



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

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



fig. 51. 

 ? .) Beyrichi Hken., 1875, For. Clav. Szab. Sch. p. 64, t. 7, figg. 11—12. 



Bulimiiia costata dOrb. 



Tab. IV, figg. 129—132. 



Although our form exhibits some differences from Bolivina costata d'Orb. in 

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

 cularly on the edges — as in >->Bulim. infläta» 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 Bul. punctata d'Orb. In its outlines 

 it often has some resemblance to Sagrina pulchella d'Orb. The aperture is very nai-- 

 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 sida. 



Syn. Bolivina costata »'Orb., 1839, Voy. Amer. mer. p. 62, t. 8, figg. 8—9; 184G, For. Bass. 



tert. Vieune"p. 239, t. 21, figg, 44—45. 

 Bulimina Presli var. Boliv. costata Park. and Jones, 1865, N. Atl. and Aret. Oc; Phil. Transact. 



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

 PBolivina subangularis Brady, 1881, Notes on retic. Rhizopod.; Qu. Joiirn. Micr. Se. (N. Ser.) 81. 



p. 59. 



