Ford — Neptunite Crystals from San Benito Co., Cat. 235 



Art. XYI. — Neptunite Crystals from San Benito County, 

 California ; by W. E. Foed. 



Historical. — In July, 1907, a new mineral, called benitoite, 

 was described by Prof. G. D. Louderback in a bulletin of the 

 Department of Geology of the University of California.* In 

 the same article a short preliminary description of what was 

 then thought to be another new species was given and to 

 which the name carlosite was provisionally assigned. Mr. 

 Lazard Calm, in the summer of 1907, first called the writer's 

 attention to the fact that this mineral was identical with the 

 rare species neptunite found previously only in the Juliane- 

 haab district, Greenland. This identity of carlosite with nep- 

 tunite was announced by Prof. Louderback at the meeting of 

 the Geological Society at Albuquerque in December, 1907, 



m 



m\ 



Fig. 3. 



and a short note to the same effect was later published by W. 

 E. Blasdale in Science for August 21st, 1908. But beyond 

 this no description of the occurrence has so far been published. 

 Through the courtesy of Mr. Calm and Mr. Milton G. Smith, 



*Vol. v, No. 9, 149, 1907. 



