REPORT OF THE DIRECTOR I917 5 1 



44 Poteriocrinus (Decadocrinus) nereus Hall 



45 Poteriocrinus ? pergracilis sp. nov. 



46 Poteriocrinus zethus Williams 



47 Schultzicrinus ? elongatus Springer 



48 Schultzicrinus typus Springer 



49 Symbathocrinus sulcatus sp. nov. 



50 Stylocrinus canandaigua sp. nov. 



D Incerlae Sedis 



1 Aspidocrinus callosus Hall 



2 Aspidocrinus digitatus Hall 



3 Aspidocrinus scutelliformis Hall 



4 Edriocrinus becraftensis Clarke 



5 Edriocrinus dispansus Kirk 



6 Edriocrinus pocilliformis Hall 



7 Edriocrinus pyriformis Hall 



8 Edriocrinus sacculus i7«// 



MINERALOGY 



Accessions. Among the important accessions may be mentioned 

 an interesting and varied suite of 1 10 geodes from Brown and Augusta 

 counties, Illinois, and Lee county, Iowa, presented by Mr Charles 

 N. Magill of Albany. These, together with the specimens from this 

 locality already in the collection, constitute a fairly complete series 

 of these interesting formations. By an exchange with the National 

 Museum the collections have acquired a series of the vanadium 

 minerals from Peru and a suite of the rare mercury minerals from 

 Terlingua, Texas, the latter of which is specially welcome in that it 

 fills several of the gaps due to unrepresented species in the general 

 collection. A suite of many large and handsome specimens of the 

 minerals of the iron and copper regions of Michigan was received in 

 exchange and purchased from the Rev. Alfred E. Healey of Ironwood, 

 Mich. 



War minerals. An exhibit of the minerals essent ; al to the manu- 

 facture of ordnance, munitions, armor p'ate, motors and other 

 articles and commodities necessary to the winning of the war has 

 been installed. In each instance the suite of specimens covering a 

 particular mineral product is headed by a concise label stating the 

 relation of that metal or compound to war industries; this is followed 

 by a small map showing the distribution of the world's supply of the 

 workable ores and pointing out in most instances the urgent necessity 

 of establishing a United States source of supply. A small series of 

 these ores is supplemented where possible by a number of finished 

 and unfinished end products. A number of these end products were 

 presented to the Museum by the Bethlehem Steel Co. through Mr 



