Cretaceous Gastropoda, ami Pelecypoda from Ziduland. 69 
M. Alphonse Peron has described and figured this species frora 
the Turonian rocks of Tunis, Dr. Pervinquiere mentions its occurrence 
in the Senonian of the same country, whilst M. Paul Choffat records 
it from the Senonian of Angola, Western Africa. 
The generic name of Veniella was substituted by Stoliczka for 
Morton's Venilia of 1834, which had been previously used by 
Duponchel for a Lepidopterous insect in 1829, the type species being 
Venilia Gonradi of Mortou (Synopsis of the Organic Eemains of the 
Cretaceous Group of the United States, 1834, pi. 8, figs. 1, 2, p. 67). 
The hinge characters of this genus agree in every way with Cyprina 
Arctica), the chief difference being that the middle tooth is more 
massive and sometimes, as in the type, of trigonal shape. External 
characters have, however, been considered of sufficient importance 
for the separation of Veniella from Gyprina. 
Meek has remarked upon Stoliczka' s inconsistency in not regard- 
ing the two Indian Cretaceous species Gyprina forbesiana and 
G. cristata as belonging to Veniella, and he quotes Conrad as his 
authority for regarding them as that genus — a plan adopted on the 
present occasion. With some typical examples for comparison, it is 
possible that Gicatrea of Stoliczka, founded on the Indian Cretaceous 
shell Gyprina cordialis, of the same author (Cretaceous Pelecypoda, 
Southern India, Pal Indica, 1871, pi. 10, fig. 1, pp. 192, 199), 
as well as Roudairia of E. P. Munier-Chalmas (type B. drui, Mun.- 
Chalm.), from the Senonian of Tunis (Mission M. le Com. Eoudaire 
Chotts Tunisiens, 1881, pi. 4, figs. 1-16, pp. 74-77) would be 
absorbed by Morton's earlier Venilia = Veniella. It is of interest 
also to note that Gicatrea and Boudairict have been regarded as 
synonyms by M. Douville in connection with some studies on the 
palaeontology of Madagascar {Bull. Soc. Geol. France, 1904, ser. 4, 
vol. 4, fasc. 2, p. 216). 
Locality. — Tributaries of the Manuan Creek. 
Veniella etheridgei, sp. nov. 
Plate VII., figs. 5, 6. 
Description.— Shell with large sub-depressed, trapezoidal, thickly 
tested valves ; umbones strongly incurved and anterior from which 
proceeds to the postero-ventral angulation a prominently curved 
ridge dividing a deep, almost vertical posterior area from the anterior 
face of the shell ; beneath the umbones is an extensive shallow 
excavation representing the lunule, although not clearly defined on 
account of the presence of the growth striations ; sculpture consist- 
ing, on the anterior region, of numerous concentric striations which 
