ORTMANN : TERTIARY INVERTEBRATES. 1 29 



patagonica, and this is certainly identical with our species. Besides, v. 

 Ihering records from the Patagonian formation a C. patagonica, but it seems 

 to me that this identification is not correct. He does not give any detailed 

 description of this supposed C. patagonica, but (as has been said above) he 

 has sent to the Princeton Museum 2 specimens of C. inccqualis under that 

 name, so that there is no doubt that his C. patagonica is really C. inccqnalis. 



If my presumption is correct that Sowerby's figure is enlarged, then it 

 is beyond doubt that this small form represented in our collections is the 

 typical C. patagonica. 



Hutton (1886, p. 364) identifies his Venericardia intermedia (1873, p. 

 24) with "C patagonica" but I am unable to say whether this species 

 corresponds to our C. patagonica. 



Record of specimens : Mouth of Santa Cruz River; 9 right, 4 left valves. 



Distribution: Santa Cruz (Sow.), ibid., Patagonian formation (v. Ih.); 

 Jegua quemada, Suprapatagonian beds (v. Ih.). 



Affinities: Sowerby compares this species with the European Eocene 

 C. acuticostata Lmck. (Wood, 1861, p. 142, pi. 22, f. 5), but there is hardly 

 any close relation with it. 



C. caiimotiensis Deshayes (1860, p. 774, pi. 61, f. 6-8) from the Eocene 

 of France has a similar outline, but is much smaller and has more numer- 

 ous and finer ribs. C. gram-data Say (Whitfield, 1894, p. 56, pi. 9, f. 

 1-4) from the Miocene of New Jersey agrees in the slightly oblique outline 

 and the number and character of ribs, but it is more circular and the apex 

 more incurved. The most closely allied form seems to be : C. dunkeri Phil. 

 (1846, p. 50, pi. 7, f. 7) from the Lower Oligocene of Germany. It agrees 

 well in sculpture and outline, but the latter is more circular, with hardly an 

 indication of triangular shape, and the apex is slightly more inclined. In 

 this species also the hinge teeth of the right valve closely correspond to C. 

 patagonica. 



Earn. LUCINID^ Flem. 



Gen. LUCINA Brug. 

 54. LUCINA NEGLECTA spec. nov. 



PI. XXVII, Fig. 3. 



Shell suborbicular, lentiform ; posterior dorsal margin slightly convex, 

 forming an obtuse angle with the posterior margin. Anterior dorsal 



