1893.] NEW-VORK MICROSCOPICAL SOCIETY. 9 



sion of the liquid marine mud and sands, numerous large masses 

 of the stratified cl^y were discharged through the twelve-inch dis- 

 charge pipes, and an examination (71 situ revealed the presence of 

 the pyritized diatoms and foraminifera. In order to put the in- 

 teresting occurrence on record, I prepared a selected slide, show- 

 ing about fifty of the fossilized remains, and this is the only one I 

 had leisure to prepare. With a one-fourth objective and con- 

 densed light a pleasant and instructive study may be made of the 

 metamorphism of forms which were once of silicious and calca- 

 reous nature. 



" Putting this locality upon record extends the known area of 

 distribution for mineralized diatoms. The earlier known speci- 

 mens were from the London clay basin. Mr. Lewis Woolman's 

 researches in the artesian-well area of the New Jersey coast have 

 extended the subject for that locality. What I have previously 

 put on record with your Society, for the artesian area of Mo- 

 bile, Ala., has disclosed its further areal extension. And my 

 present contribution from Galveston Bay continues the chain, to 

 be carried on by others interested in the subject. 



'* I noted the following genera : Coscmodisais, Actinoptychus, 

 and Campylodiscusi but did not observe a single Tricefatium in my 

 limited study of the material." 



Mr. Cornelius Van Brunt donated to the Cabinet a photographic 

 negative of Pleurosigina angulatum, taken with a Natchet immer- 

 sion, No. 7 lens, by the late Samuel Jackson. Mr. Van Brunt 

 also placed before the Society a cabinet of one hundred and fifty 

 microscopical slides, of the collection of Mr. Jackson, which his 

 family now offered for sale to the Society, and stated that Mr. 

 Jackson was one of the best preparers of microscopical objects, 

 and, until near the time of his death, was one of the most active 

 members of the American Microscopical Society of the City of 

 New York. It was proposed to purchase the collection of slides 

 for the Cabinet of the Society, the expense to be defrayed by 

 subscription. 



OBJECTS EXHIBITED. 



1. Section of leaf of Hoya carnosa., with crystals of calcium 

 oxalate. 



2. Transverse section of stem of Hoya carnosa. 



3. Transverse section of petiole of Aspidestris. 



