204 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



Record of specimens: Mouth of Santa Cruz River, about 270 sp. ; Paso 

 del Rio Santa Cruz, i sp. ; Las Salinas, 4 sp. 



Distribution: Santa Cruz (Sow., Roch. & Mab., v. Ih.), La Cueva (v. 

 Ih.), Patagonian beds (v. Ih.). 



Sowerby mentions casts of a large variety from San Julian ; our collec- 

 tions show (see above) that these casts belong to S. ameghinoi, and chiefly 

 to the variety multinodosa. 



Affinities of the genus Struthiolaria : The genus Struthiolaria is restricted 

 to the southern hemisphere, and is found aside from the Patagonian, 

 Navidad and Magellanian beds only in the Tertiary beds of New Zealand, 

 and living in New Zealand and Australia, and, further, it has been dis- 

 covered in the lower Miocene of northern Peru (Zorritos, see : Grzybowski, 

 1899, p. 647). It begins in New Zealand, according to Hutton (1873, p. 

 x), in the lower Miocene, but it is not represented in the Oamaru or 

 Oligocene beds. The New Zealandian species differ considerably in 

 sculpture from the South American forms, only the form described by 

 Zittel (1864, p. 35, pi. 15, f. 3) without specific name resembles slightly 

 the Patagonian type of this genus. 



Fam. DOLIIDsE Ad. 



Gen. DOLIUM Lmck. 

 134. DOLIUM OVULUM Ortmann. 



PI. XXXIII, Fig. I3'. 



1900 D. o. Ortmann, in: Amer. Journ. Sci., v. 10, p. 374. 



Shell ovato-globular, spire short, conical, acute, last whorl large. Sur- 

 face with fine and crowded revolving striae, which are subequal, but in the 

 lower part of the shell finer striae are intercalated. Mouth large, elon- 

 gated-oval, canal very short, truncated, straight and comparatively nar- 

 row. Inner lip without callus, tubercles or folds. Outer lip slightly 

 thickened. 



Height, 34 mm; diameter, 25 mm. 



Remarks: I do not see any crenulations on the inside of the outer lip, 

 but the latter is partly broken away or obscured by hard matrix. 



