PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 



EXPLANATION OF PLATE XXXVII. 



PAGE 

 Fig. I. VOLUTA DOMEYKOANA Phil 232 



Patagonian beds ; mouth of Santa Cruz River. 



i a. Front view of a typical individual, with well-developed nodes, 

 i b. Front view of an individual, with the nodes scarcely developed. 

 Fig. 2. GENOTA CUEVENSIS v. Ih. ........ 240 



Patagonian beds ; mouth of Santa Cruz River. 



Front view of an individual of medium size. 

 Fig. 3. DRILLIA SANTACRUZENSIS Ortm. . . . . . . . 241 



Patagonian beds ; mouth of Santa Cruz River. 



30. Front view of a well-preserved individual. 

 3& The same, 3/1. 

 Fig. 4. BORSONIA PATAGONICA Ortm. ........ 242 



Patagonian beds ; mouth of Santa Cruz River. 

 4#. Back view of a large individual. 

 4<5. Front view of a partly broken individual, showing two colu- 



mellar plaits. 



4<r. Front view of a broken individual, showing only one plait, 

 the lower one being obliterated. 



Fig. 5. ACTION CHILENSIS Phil. 243 



Lower Magellanian beds ; Punta Arenas. 

 5. Front view of shell. 

 5<$. The same, 3/1. 

 Fig. 6. ACTVEON SEMiL;vis Ortm. ........ 244 



Patagonian beds ; Mount of Observation, upper horizon. 

 6a. Front view of shell. 

 6b. The same, 3/1. 



Fig. 7. BULLA REMONDI Phil. .... . . 245 



Lower Magellanian beds ; Punta Arenas. 



70. Front view of shell. 



7^. The same, 3/1. 

 Fig. 8. BULLA PATAGONICA v. Ih. ........ 246 



Patagonian beds ; mouth of Santa Cruz River. 



8a. Front view of a large individual. 



8. Front view of a young individual. 



Sf. The same, 3/1. 



