Cretaceous Gastropoda, and Pelecyiooda from Zululand. 27 
Dimensions (comprising the spinous extensions). — 
Length 12 mm. 
Width 16 „ 
Observations. — This rehc appears to find its place in the genus 
Drepanocheilus on account of its single lateral spinous projection, 
which, however, has no spreading character or curvature as in the 
type, but is quite narrow and horizontal throughout its length. It is 
difficult to associate it with any described species, although a great 
deal has been written on this group of Gastropods. It is most 
probably related to the Albian form of Bostellaria calcarata of 
J. Sower by, which, according to Starkie Gardner exhibits consider- 
able variation in the width and character of the labial extension 
Geol. Mag., 1875, pi. v., figs. 7-16, pp. 128-130) ; in ornamentation 
it also favours the sculpture details of Bostellai^ia americana of 
Evans and Shumard from the Senonian of the United States. 
Meek's original description of this genas, founded upon Bostellaria, 
americana of Evans and Shumard {Trans. Acad. Sci. St. Louis, 1857, 
vol. i., p. 42; figured by Meek, Eept. Invertebrate Cretaceous and 
Tertiary Fossils of the Upper Missouri Country — United States 
Geol, Surv. Territories, 1876, vol. ix., pi. 32, fig. 8, p. 325) from the 
Upper Cretaceous Series (Senonian) of Nebraska Territory, United 
States, mentions its resemblance to " Aijorrhais but without a 
posterior canal extending up the spire, and having the lip pro- 
duced into a single, usually scythe-shaped projection. This type, as 
well as the including genus Anchura, differ from the Jurassic genus 
Alaria in never having the labial appendage developed during the 
growth of the shell, so as to be left behind the aperture as projecting 
spines on the body-whorl or spire. It, however, probably includes 
some of the so-called Alaria.'' 
According to M. Cossmann, Dijnorphosomcc of Starkie Gardner 
(Geol. Mag., 1875, p. 396: type = Bostellaria calcarata, J. Sowerby) 
should be recognised as a synonym of this genus (Essais de Paleo- 
conchologie Comparee, 1904, part 6, p. 75). 
Locality. — Tributaries of the Manuan Creek. 
Genus PEEISSOPTEEA, E. Tate, 1867. 
Geological and Natural History Eepertory (S. J. Mackie), 1867, 
p. 98. 
Pebissoptera, sp. 
Plate VIII., fig. 20. 
Observations. — Among the False Bay material is the earlier portion 
of an Ajjorrhais -like shell showing about 7 whorls all moderately 
