PLATE XXXVII. 



Hawaiian SoriD-HOOK Sinkers. 



5258- 

 5229. 

 5264. 



5257- 

 52:10. 



5241- 

 5195- 

 5218. 

 5220. 



from 

 and a 



\'oIcanic nodule. 5269 



Coarse coral rock. 5254 



Dark crystals in while matrix. 5262 



.Same as last specimen. 5246 



Coral rock. 5224 



Decomposing crystals, red matrix. 519S 



\'olcanic nodule. 5226 



Rose granite. 5245 



Volcanic nodule. 5238 



Coarse metamorphic rock. 



Olivine lava. 



Reddish crystalline rock. 



Granitoitl rock. 



Granitoid rock. 



Dark cry.stals in white matrix, heavy. 



Olivine almost entireh'. 



Dark crystals in white matrix. 



\'olcanic olivine, pyrite, etc. 



B\- the term \-olcanic nodule I mean certain masses of undetermined composition extruded 

 the slowh- moving lava flows. They are often hematite, olivine, ochre or a mi.xture of these 

 ugite, and are often several inches in diameter. 



