NO. 6 CUSHMAN, MCCULLOCH : LAGENIDAE 359 



EXPLANATION OF PLATE 48 



Figs. 



1. Lagena submagnifica Cushman and Gray. X 65, p. 355. 



2. Lagena cf. sulcata (Walker and Jacob). X 65, p. 355. 



3-7. Lagena sulcata (Walker and Jacob), van spicata Cushman 

 and McCuUoch, n. name. X 65, p. 360. 



8-10. Lagena sulcata (Walker and Jacob), van laevicostata Cush- 

 man and Gray. X 65, p. 36L 



11-13. Lagena sulcata (Walker and Jacob), var peculiaris Cushman 

 and McCulloch, n. var. X 65. 12, Holotype. 11, 13, Paratypes, 

 p. 361. 



14, 15. Lagena vjilliamsoni (Alock). X 65, p. 362. 



In all specimens, a, front view; b, apertural view. 



