Cretaceous Gastropoda, and Pelecypoda from Zululand. 59 
with the adult form of Veniella forhesiana. The primary costse are 
very prominent, each pair enclosing the four subsidiary ribs which 
characterise the shell, the laterals being usually smaller than the 
two centrals. Occasionally the minute sculpture of the shell is 
preserved, so that with the aid of a lens extremely fine and closely 
arranged concentric striations may be seen ornamenting the ribs and 
the intercostal spaces. 
Dimensions. — 
Length 35 mm. 
Height 37 
Diameter 15 ,, 
According to Mr. H. Woods, who has published the latest views 
upon this species, N. quinquecostata has an extensive geological 
range, having been found in Britain in the so-called Lower Green- 
sand deposits of Upware and Faringdon which form part of the 
Aptian series, and occurring also throughout the later Cretaceous 
divisions up to the Micr aster cor-anguinum zone which belongs to 
the Santonian stage of the Emscherian or Lower Senonian strata, 
where the species apparently becomes extinct. 
Mr. Wood's Monograph must be appealed to for a fuller synonymy 
of the species as only those references are given on the present occa- 
sion which deal chiefly with Indian and African occurrences. Southern 
Indian examples have been described by Forbes and Stoliczka, the 
latter author acknowledging the species in all three divisions of the 
Indian Cretaceous, viz., the Utatur, Trichinopoly and Ariyalur. 
Both Baily and Griesbach have determined specimens from the 
coast cliffs of S.E. Africa near Natal, the former recognising the 
shell's identity with the " Upper Greensand species from War- 
minster," whilst Mr. Griesbach determined his examples as similar 
to Forbes's from Pondicherry in Southern India. 
Dr. Miiller in his notice of the species from German East Africa 
(Kigua) regards it as of Cenomanian age. It is reported as occurring 
in the Upper Cretaceous rocks of the Island of Socotra by Dr. 
Kossmat. Dr. Blanckenhorn records it in the Buchiceras syT'iaciim 
zone of Syria (= Cenomanian). In Algeria Coquand determined 
the species as of Ehotomagian age a term now regarded as equivalent 
to Cenomanian, and in Tunis Professor Peron recognised the shell 
as ranging from Cenomanian to the Danian. 
Locality. — Tributaries of the Manuan Creek. 
