PATAGONIAN EXPEDITIONS I PAL/EONTOLOGY. 



EXPLANATION OF PLATE XXXI. 



PAGE 



Fig. i. DENTALIUM SULCOSUM Sow T 57 



Patagonian beds ; mouth of Santa Cruz River. 



i a. Five fragments, belonging to different individuals, put to- 

 gether so as to show probable form of a complete individual. 

 \b. View of upper end of uppermost fragment. 

 Fig. 2. DENTALIUM OCTOCOSTELLATUM Plsb. and Sh.- . . . . . 160 



Patagonian beds; Mt. of Observation, upper horizon. Largest frag- 

 ment present in the collection. 

 Fig. 3. CALLIOSTOMA PERARATUM Cossm. . . . . . . . 165 



Patagonian beds ; mouth of Santa Cruz River. 

 3#. Side view. 

 3<5. The same, 2/1. 

 Fig. 4. CALLIOSTOMA COSSMANNI Ortm. . . . . . . . 166 



Patagonian beds ; mouth of Santa Cruz River. 

 4#. Side view. 

 \b. The same, 3/1. 

 Fig. 5. CALLIOSTOMA SANTACRUZENSE Cossm. . . . . . . 167 



Patagonian beds ; mouth of Santa Cruz River. 

 5#. Side view. 

 5<5. The same, 3/1. 

 Fig. 6. CALLIOSTOMA GARRETTI Ortm. . . . . . . . 168 



Patagonian beds; mouth of Santa Cruz River. 

 6a. Side view. 



66. Portion of surface sculpture, enlarged. 

 Fig. 7. CALLIOSTOMA IHERINGI Ortm. . . . . . . 169 



Patagonian beds ; mouth of Santa Cruz River. 

 7. Side view. 

 "jb. Lower view. 

 Fig. 8. GIBBULA L^VIS (Sow.) ......... 1 70 



Patagonian beds ; mouth of Santa Cruz River. Upper view of speci- 

 men imbedded in matrix. 

 Fig. 9. GIBBULA DALLI v. Ih. . . . . . . . 171 



Patagonian beds ; mouth of Santa Cruz River. 



ga. Side view. 



gb. Upper view of the same individual. 



Fig. 10. GIBBULA DIAMETRALIS Cossm. . . . . . . . 172 



Patagonian beds ; mouth of Santa Cruz River. 

 ioa. Side view. 

 lob. Upper view of the same individual. 



