300 Annals of the South African Museum. 



localities/'' as well as from Northern Africa,! Southern India,! 

 Australia,! America, j| &c. Some of the examples from Gosau 

 figured by Zittel closely resemble I. expansus. 



Family ASTAKTID^. 



Genus ASTAETE, Sowerby. 



AsTARTE Griesbachi, sp. nov. 



Plate XXXV., figs. 18, 19. 



1871. Astarte, sp., Griesbach, Q.J.G.S., xxvii., p. 67, pi. iii., fig. 9. 



Descri2)tion. — Shell small, moderately convex, subquadrate, slightly 

 longer than high, moderately inequilateral. Antero-dorsal margin 

 concave. Anterior and ventral margins rounded. Postero-dorsal 

 margin slightly convex, forming an obtuse angle with the slightly 

 curved posterior margin. Umbones pointed. Lunule smooth, rather 

 large, sharply limited. Escutcheon smooth, deep, long. 



Ornamentation consists of from 7 to 10 prominent, stout, con- 

 centric ribs which curve rather sharply on the postero-dorsal part of 

 the valve. The ribs are separated by rounded furrows broader than 

 themselves. A few fine ribs are present on the main ribs and in the 

 furrows. Margin of valve crenulated. 



Length 7-75 . 5 mm. 



Height 7 . 4-5 „ 



Affinities. — This species belongs to the same type as Astarte 

 similis, Goldfuss.^ It resembles Gouldia trigonoides, Stoliczka.*'-' 

 but is* less elongate and not so narrow posteriorly ; also the ribs 

 appear to be closer together. 



A. subnumismalis, Thomas and Peron,ff from the Santonian of 



* Zittel, Bivalven d. Gosaugeb., pt. 2 (1866), p. 19, pi. xiv., figs. 1-5 ; pi. xv., 

 figs. 1-5. Geinitz, Das. Elbthalgeb. in Sachsen, pt. 2 (1872), p. 49, pi. xiii., 

 figs. 11-15. Schliiter, Zur Gattung Inoceramus (Palseontographica, vol. xxiv. 

 1877), p. 277. 



t Peron, Brach. etc. Terr. Cret. de la Tunisie (1893), p. 242. 



I Stoliczka, Cret. Fauna S. India (1871), p. 405, pi. xxvii., figs. 1-3 ; 

 pi. xxviii., fig. 2. 



§ Etheridge, Cret. Invert. Fauna N.S. Wales (1902), p. 70. 



II Komer, Kreidebild. v. Texas (1852), p. 56, pi. vii., fig. 2. 



11 Holzapfel, Mollusk. Aachen. Kreide (Palseontographica, xxxv., 1889), p. 194, 

 pi. xix., figs. 11-15. 



** Cret. Fauna S. India (1871), p. 290, pi. x., figs. 4 8. 



tt Explor. Scient. Tunisie, Descript. Brach. etc. des Terr. Cr6t. (1893), p. 268, 

 pi. xxviii., figs, 7, 8. 



