34 PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 



bears about fifteen prominent transverse costae, crossed by numerous fine, 

 thread-like, spiral lines. There is also a prominent spiral ridge, which is 

 just covered by the succeeding whorl and below which the surface bears 

 only the spiral lines. Species with similar form of whorl and sculpture are 

 common in Anchura, Aporrhais and other genera of this family. 



TORNATELL/EA PATAGONICA Sp. nOV. 

 PI. VI, Figs. 1 8 and 19. 



Shell of medium size, ovate, consisting of four or five rapidly increas- 

 ing convex whorls, of which the last constitutes about five-sevenths of 

 the total height ; apex of spire obtuse, not prominent ; aperture elongate, 

 narrow above, rounded and apparently somewhat sinuous or emarginate 

 below ; outer lip slightly thickened and smooth within ; inner lip forming 

 a moderate callus and bearing two distinct folds, one of which is near the 

 lower end and the other below the middle of the aperture ; surface marked 

 by rather coarse spiral furrows, of which there are about 25 on the last 

 whorl. 



Height of the larger specimen, 14 mm.; breadth, 10 mm.; height- of 

 aperture, 10 mm.; breadth of aperture, 4 mm. 



The species is represented by only two specimens, both of which are 

 figured. Similar forms have frequently been described as Actaeon and 

 Solidula, but according to Cossmann's J revised descriptions of those groups 

 such forms should be referred to Conrad's genus Tornatellaea, which ranges 

 from the lower Jura to the Miocene. 



It should be stated, however, that the types of this species have the 

 outer lip and lower part of the aperture broken and the generic reference 

 is therefore not absolutely certain. 



Locality and position. From the Ammonite (Belgrano) beds, ten miles 

 east of Lake Pueyrrydon. 



ClNULIA AUSTRALIS Sp. nOV. 

 PI. VI, Figs. 1 6 and 17. 



Shell small, subglobose, consisting of about four convex whorls, of which 

 the last forms three-fourths of the total height ; suture slightly impressed ; 

 surface marked by numerous inconspicuous, impressed, spiral lines (about 



'Essais de Paleoconchologie comparee, Liv. I, pp. 45-50, Paris, 1895. 



