The Cretaceous Fauna of Pondoland. 317 



Aperture semi-lunar, oblique. Inner lip nearly straight, oblique 

 to the axis of the shell, somewhat thickened. Umbilicus small. 

 Surface of whorls smooth except for numerous growth-lines, and, 

 in some cases, faint spiral ribs. 



Length 15 mm. ; breadth 13 mm. 



Bemarks. — This species belongs to the same group as Natica lyrata 

 of d'Orbigny.* 



The type is in the Museum of the Geological Society ; the shell is 

 missing from the spire and part of the last whorl, but is restored in 

 Baily's figure. 



Genus GYEODES, Conrad. 



Gyrodes, sp. 

 Plate XXXVIII., figs. 9, 10. 

 Description. — Shell globose. Spire short, formed of four whorls. 

 Last whorl very much larger than the preceding whorl, much 

 broader than long, inflated, with rounded margin. Posterior part of 

 whorls flattened or depressed near the suture. Aperture not seen. 

 Umbilicus large. 



Bemarks. — There are several examples of this species, but in all 

 the aperture is broken. It appears to resemble G. teneUus, Stohczka.f 



Family TURRITELLID^. 



Genus TUEEITELLA, Lamarck. 



Sub-genus ZAEIA, Gray. 

 TuRRiTELLA (Zaria) Bonei, Baily. 

 Plate XXXVIII., figs. 11, 12. 

 1855. Turritella Bonei, Baily, Q.J.G.S., xi., p. 458, pi. xii., fig. 7. 

 1871. Tttrritellamultistriata, Griesbach, Q.J.G.S., xxvii., p. 64. 

 1904. Zaria Bonei (?), Etheridge, Second Eeport Geol. Survey Natal 

 and Zululand, p. 85, pi. ii., figs. 28-31 ; pi. iii., fig. 9. 

 Bemarks. — In the larger number of examples there are three 

 prominent spiral ribs on each whorl and a rather large space 

 between the suture and the first rib in front of it (fig. 12), but in 

 several specimens the number of ribs is four or five, and in such 

 cases one or two of the ribs may be smaller than the others (fig. 11). 



* Pal. Franc,'. Terr. Cret., vol. ii. (1843), p. 161, pi. clxxii., fig. .5. 

 t Cret. Fauna S. India, vol. ii. (186s), p. 306. pi. xxii., fig. 14. 



