REPORT OF NATIONAL MUSEUM, 1922. 87 



bibliography. Manuscript of :i handbook descriptive of the collec- 

 tions, both exhibition and study, in the entire department has been 

 prepared for publication in the Smithsonian report, and is now in 

 the hands of the editor. Numerous minor investigations have been 

 completed by Mr. Shannon. New materials have been given first 

 attention, and a series of minerals from the Columbia basalt at 

 Spokane. Wash., and of rare zeolites from Challis, Idaho, have been 

 examined in detail. Of materials previously incorporated in the 

 collections, three 4 ' gouge " clays from precious metal veins, an 

 andorite-bearing silver ore from Nevada, velardenite from Cali- 

 fornia, trichalcite from Idaho, pucherite, wavellite, pyrite, and 

 garnet have been analyzed or crystallographically studied and de- 

 scribed. Study of iddingsite in collaboration with C. S. Ross was 

 continued, while in association with Dr. E. S. Larsen several min- 

 erals from Franklin Furnace were described. Hisingerite from 

 Delaware was worked on in a joint investigation with Alfred C. 

 Hawkins, and several minerals from Pennsylvania in collaboration 

 with Dr. E. T. Wherry. At present the meteoric mineral merrillite 

 is being investigated with Doctors Larsen and Wherry. 



The completion of Secretary Walcott's study of the appendages 

 of the trilobite is noted among paleontological researches. His 

 other scientific investigations include a preliminary examination of 

 the fossils found in the pre-Devonian formations between Bow 

 Valley and Wilcox Pass. 



Dr. Frank Springer has made further progress on his monograph 

 of the Silurian crinoids of the Ohio Valley, for which new material 

 has been obtained. He has also investigated for the Geological Sur- 

 vey of Canada some collections made by its staff in the Mackenzie 

 Eiver Basin, resulting in the recognition of a crinoidal fauna which, 

 while the species are all new, parallels in a remarkable way that of 

 the Upper Devonian formation of Belgium. One paper by him on 

 this subject was published by the Canadian Survey and another is 

 now in press. Specimens illustrating the discoveries were acquired 

 for the Museum collection. Another important acquisition made by 

 Doctor Springer for the benefit of the Museum consists of a con- 

 siderable series of new species of crinoids from the island of Timor 

 in the Dutch East Indies, obtained through his correspondence with 

 the geologists who conducted the expedition supported by the Gov- 

 ernment of Holland. Doctor Springer has #lso studied and reported 

 upon a collection from the Cretaceous of the State of Tamaulipas, 

 Mexico, made by Dr. L. W. Stephenson, of the United States Geo- 

 logical Survey, in which the genus Balanocrinus was recognized for 

 the first time in America. 



Doctors Ulrich and Bassler completed a monograph on Silurian 

 Bryozoa and Ostracoda of Maryland, and a treatise on Silurian 



