The Invertebrate Fauna of the Uitenhage Series. 129 



1843. Astarte capensis F. Krauss, Amtlicher Bericht iiber die 



zwanzigste Versammlung der Gesellsch. deutsch. 



Naturforscher und Aerzte zu Mainz im Sept., 1842, 



p. 130. 

 1850. Astarte herzogii F. Krauss, Nov. Act. Acad. Caes. Leop. -Carol. 



Nat. Cur., vol. xxii., pt. 2, p. 447, Tab. 47, figs. 2a-2e. 

 1905. Astarte herzogi A. W. Eogers, An Introduction to the 



Geology of Cape Colony, p. 291, fig. 25 (1). 



Occurrence. Specimens before me are from the uppermost 

 red bed in a kloof east-north-east of Bed House on Zwartkop's 

 Eiver (326, 327), and from a krantz near Picnic Bush, north-east 

 of Eed House (328). Messrs. Eogers and Schwarz also found this 

 shell in the cutting on the road running from the farm Perseverance 

 on to the plateau, and leading to the Salt Pan. Stow obtained 

 specimens at McLoughlin's Bluff and between the Addo and Modder 

 Drifts, on the Sunday's Eiver. Hertzog's collection, including this 

 shell, was obtained in the Sunday's Eiver district about eighteen 

 miles from Enon.* Krauss collected specimens on the left bank 

 of the Zwartkop's Eiver, below Uitenhage. 



Eemarks. Krauss furnished such an accurate description of this 

 shell that it will only be necessary to supplement this by a discussion 

 of its narrower relationships. Astarte herzogi cannot be looked upon 

 as a typical representative of its genus, and it is by no means a 

 simple matter to assign it to its correct position among recognised 

 sub-generic groups. The principal characters to be borne in mind 

 in this connection are as follows. The shell has a lenticular form 

 and frequently an almost circular outline ; it is ornamented by 

 crowded concentric ribs and sulcations forming a well-developed 

 sculpture. The lunule is short, but is sharply bounded and of very 

 deep and concave form ; the escutcheon is very narrow and 

 elongated, almost entirely occupied by the long ligament space, 

 and very sharply marked off from the flank. In the right valve 

 there is a distinctly developed posterior lateral dental process, 

 situated behind the elongated external ligament, and an anterior 

 (sub-lunular) depression in the hinge-plate for the reception of an 

 anterior lateral process of the left valve. The pallial margin of the 

 valve is strongly notched on its inner side ; the pallial line is 

 posteriorly rather weakly impressed. 



We are therefore dealing with an Astarte in which lateral hinge 

 processes are definitely developed. The evidence for the presence or 



* See Hausmann (1), p. 1459 (as Cytherea). 



