26 KANSAS ACADEMY OF SCIENCE. 



condenses at or near the surface of the dump-pile. Needle-shaped crystals, 

 fully 5 c. m. in length, have been seen. 



2. Chalcopyrite (copper pyrites) occurs in perfect tetrahedral crystals, which 

 are generally — though not always — adhering to zinc blende. They vary in 

 size from 1 mm. to § cm. in thickness. It is quite common in three or four 

 shafts in the Short Creek lead mines, and a few specimens of it have been 

 obtained from Joplin, Missouri, although its occurrence at Joplin is not men- 

 tioned by Prof Leonhard in his " Notes on the Minerals of Missouri." 



3. Greenockite (cadmium sulphide) has been found in a number of different 

 shafts in the Short Creek mines, occurring as a yellow, or yellowish green, in- 

 crustation It gives to some brilliant sphalerite crystals a most beautiful ap- 

 pearance. No crystals have yet been found. 



4. Anglesite (lead sulphate) is found adhering to galena. {^Rare.') 



PROTOZOAN REMAINS IN KANSAS CHALK. 



BY PROF. G. E. PATRICK, OF THE STATE UNIVERSITY. 



At the meeting of the Academy in 1875, 1 presented a paper upon " Kan- 

 sas Chalk," then a recent discovery, and then first brought before the scien- 

 tific world as the only known chalk in North America. 



In that paper, after speaking of the chalk chemically and industrially, I 

 stated that, with the highest microscopic power at my disposal, I had been 

 unable to detect organic remains; and being of opinion that said power was 

 sufficiently high for the purpose, favored the theory of chemical precipitation 

 in accounting for the formation of this chalk. It has turned out, however, 

 that a higher magnifying power alone was needed to render visible forms of 

 undoubted organic origin. This was shown during last year (1882) by Mr. 

 W. S. Bunn, a student at the University, and the possessor of a good micro- 

 scope with an objective of much higher power than that previously used by 

 myself. 



Mr. Bunn made out two forms,_one circular, the otherjrod-like, and thought 

 he detected dark spots on some of the circular ones. He intended making 

 further observations with a higher power than he then possessed; but being 

 called away from the Univei-sity, and having been since engaged in pursuits 

 of a quite different character, he has given the subject no further attention, 

 except to request me to report his observations to the Academy, together 

 with any others that I might be able to make. 



My own facilities for observation are no better now than when I originally 

 examined the chalk; but through the kindness of Prof. E. A. Popenoe, I 

 have had the use of an immersion lens of iV-inch focal length, by means of 

 which a few details were rendered visible which it may be worth while to 

 describe here: 



The circular forms (disks) observed by Mr. Bunn were found 'not all to 



