1892.] NEW-YORK MICROSCOPICAL SOCIETY, 65 



will make a fine polariscope object, as a thin section will prob- 

 ably show Diatoms, Polycistina, Foraminifera, and sections of 

 larger shells, the whole silicified and strongly crystalline in 

 structure. It is from the same formation as the marine tripoli 

 previously sent to the Society, 



" 2. A cement stone from Sendai, Japan. This was sent me 

 by M. J. Tempere, Paris, joint editor of the ' Diatoms of Yeddo 

 and Japan,' as a return for Montgomery earth. It can be used 

 as thin sections, from which much maybe learned of the internal 

 structure of the Diatoms and Polycistina contained therein. 

 Being of a flinty nature, it will take a vitreous polish, bringing 

 out the internal structure as seldom seen in diatom slides. 



" 3, A piece of coniferous wood, derived from a vein of lignite, 

 ejected from the depth of about 700 feet from the new artesian 

 well recently finished at Mobile, 



" 4. A piece of genuine lignite coal, also from the artesian 

 well, at a depth of 700 feet. When brushed down in water it 

 furnishes fine slides, showing plant structures : as scalariform 

 tissues, pitted ducts, reticulated tissue, and spores and capsules 

 of several kinds. It is best studied with a high power. The 

 whole is interesting when viewed in its mineralogical relation to 

 bituminous coal and the immense period separating them geo- 

 logically." 



OBJECTS EXHIBITED. 



1. Serial sections through the body, next and posterior to the 

 gill covers, of the fish Atherina sp.. Dotted Silverside : by L. 



RiEDERER. * 



2. Serial sections of the vertebral column of the same : by L. 



RiEDERER. 



3. Serial sections of the same, showing gill arches : by L. 



RiEDERER, 



4. Section of fossil Coral : by T. B. Briggs. 



5. Crystals on under surface of glass covering a daguerreotype 

 taken in 1850 : by T. B. Briggs. 



6. Larva of the wood-boring wasp, Crabro sexmaculatus Say : 

 by J. L. Zabriskie. 



