Literature Relating to Staten Island 113 



The Structure of the Stomata of Certain Cretaceous 



Conifers^ 



This is another of the many scientific pubHcations of recent 

 years in which the fossil plant remains of the Kreischerville clays 

 are either described in detail or incidentally discussed with ref- 

 erence to other similar remains from elsewhere. In the present 

 article the author describes and figures the stomata and surround- 

 ing guard cells of certain living and extinct coniferous plants, 

 including Androvettia statenensis Hollick & Jeffrey, in regard to 

 which he says : " Fig. 9 is a photograph showing the general 

 features of the epidermis of the species. The cells are very thick- 

 walled and irregular in shape. The numerous stomata lack the 

 definite arrangement characteristic of Frenelopsis. The more 

 highly magnified representation given in Fig. 10 shows the pres- 

 ence of accessory cells around the stomata as iDefore. In this 

 case they lack the conical projections of Frenelopsis, the opening 

 having a uniform outline. . . . Owing to the good condition of 

 preservation of this plant, the guard cells are distinguishable in a 

 majority of cases. . . . Fig. 11 shows two stomata from which the 

 guard cells have completely disappeared, although the accessory 

 cells are present in their normal condition." 



A. H. 



Limonite Deposits of Staten Island, New York* 



This contribution consists of a brief description of the main 

 topographic and geologic features of Staten Island, with a dis- 

 cussion of the distribution and origin of the limonite deposits. 

 Several old analyses of the ores are included, and a comparison is 

 made with certain Cuban ores whose genesis and general rela- 

 tions are similar. A number of references to old articles relat- 

 ing to the Staten Island iron ores are cited, but the more recent 

 notes and papers relating to them, published in our Proceedings 

 in recent years, were evidently not seen by the author. 



A. H. 



3 w. P. Thompson, Bot. Gaz. 54 : 62,-67, pis. 5, 6. July, 1912. 



* Charles R. Fettke, School of Mines Quarterly 33 : 382-391. July, 1912. 



