178 Annals of the South African Museum. 



whorls and the mouth closely approaches that of Actceonina ather- 

 stoni, but the spire of the English shell is relatively shorter, and the 

 spiral striae are confined to the lower part of the whorls. 



A specimen from the Upper Cretaceous beds of Umkwelane Hill, 

 Natal, has been described as a variety of Actaonina atherstoni by 

 R. Etheridge, jun. (var. umkwelanensis).--' To judge from the figure 

 of this supposed variety, there is a general resemblance to Actaonina 

 atherstoni, although the spiral striae are depicted as of a coarser 

 character than in the Uitenhage form. Mr. Etheridge's remarks 

 on his new variety do not suffice to enable a satisfactory com- 

 parison to be made, but I am inclined to doubt the likelihood of 

 near relationship between these forms. 



Actaonina haugi Ascher, from the Grodischter Schichten,! the 

 equivalent of the Hauterivian in Silesia, is of similar general type 

 to A. atherstoni, and is ornamented over the whole surface of the 

 whorls by minute spiral striae. It is more slender and elongated, 

 however, and more cylindrical in form, and has a narrower spiral 

 angle and less convex whorls than A. atherstoni. The specimen 

 numbered 95h, mentioned above, approaches closely to A. haugi in 

 the form of the spire, but has a more convex and less cylindrical 

 body-whorl. 



GENUS LIMN/EA Lamarck. 

 LIMN.EA BEMOTA sp. nov. 

 Plate VIII., figs. 18, 18a. 



Description of a Single Specimen. The specimen, which is im- 

 perfect at the apical end, consists of nearly four whorls, and is 

 wound in the form of a tall spire, having a somewhat pupoid figure. 

 The outline of each whorl slopes down very steeply from the spiral 

 suture, giving the whorl a gently and evenly convex profile. The 

 volutions are relatively high between the sutures. The body-whorl 

 overlaps about one-third of the previous whorl, and occupies nearly 

 one-half of the total height of the shell. The rather steeply inclined 

 spiral suture is not deeply impressed. 



The spiral angle is about 30. The shell-wall is thin, and its outer 

 surface is marked by numerous wrinkles and furrows of accretion. 

 The mouth aperture is in the form of an acute angle above, and is 

 of rounded oval outline below. Its height is about twice as great as 



* Etheridge (1), p. 87, pi. ii., fig. 38. 



t Ascher (1), p. 152 [18], Taf. xii. [i.], fig. 12o-c. 



