20 Transactions of the Boyal Society of Soutli Africa. 
is chiefly in the basal region where certain differences may be 
observed, the Indian sliell having a much narrower and less 
developed umbilical region, whilst the aperture is wider and more 
inclined to obliquity. Again, the traces of a fine spiral punctation 
in the shell structure referred to in Stoliczka's species are not 
observable in the specimen from Zululand. 
In pointing out the relations of this shell to further forms it may 
be stated that resemblances can be traced with Gyrodes euryomjjhala 
of Philippi, sp., which has been determined and figured by Wilckens 
from the Upper Cretaceous beds of the island of Quiriquina, off Chili 
(Neues Jalirh. Beilage-Band, 1904, vol. 18, pi. 17, fig. 10, p. 198), 
these deposits being regarded in De Lapparent's " Traite de 
Geologie," ed. 5, 1906, p. 1467, as of Upper Senonian age. Another 
form presenting similarity is Meek's Gyrodes Conradi, identified by 
Stanton as a member of the Upper Cretaceous fauna of Colorado 
{Bull United States Geol. Surv. 1893, No. 106, pi. 29, figs. 7, 8, 
p. 136), which Dr. Kossmat recognises as of Turonian age. Meek 
himself having originally described the species from the Fort Benfcon 
Group of Dakota Territory [Rept. United States Geol. Surv. Terri- 
tories, 1876, vol. ix., p. 310, woodcuts, figs. 33-36). 
Locality. — Tributaries of the Manuan Creek. 
Family SCALID^. 
Genus SCALA, G. Humphrey, 1797. 
Museum Calonnianum [London] , 1797, p. 23. 
SCALA ZULULANDI^, Sp. nOV. 
Plate YIIL, figs. 18, 19. 
Descrij^tion. — Shell elongately conical, acuminate, imperforate ; 
whorls 9-12, plano-convex, moderately deep, finely and distinctly 
sutured, posteriorly furnished with a bevelled margin embracing the 
base of previous volution ; whorls ornamented with from 15 to 16 
thick, rounded, equidistant, curved, longitudinal plications sepa- 
rated by well-channelled interspaces, surface structure composed of 
minute spiral and longitudinal striations ; anterior keel not present. 
Dimensions. — 
Length 50 mm. 
Diameter 19 ,, 
Observations. — This form of Scala is represented by a single 
example, which is imperfect at both extremities, parts of the basal 
and the eight earlier whorls only being preserved, the original number 
