46 KEPORT OF NATIONAL MUSEUM, 1912. 



famil}^ in the Museum is being worked up. Miss Eathbun also de- 

 scribed for the Geological Survey a small collection of fossil crus- 

 taceans from the Atlantic coastal plain of the Southern States, and 

 began the preparation of a report on the fossil decapods collected in 

 the Panama Canal Zone and in Costa Rica by Mr. D. F. MacDonald, 

 geologist of the Isthmian Canal Commission, and Dr. T. Wayland 

 Vaughan, of the Geological Survey. 



Mr. Austin H. Clark, also assistant curator, continued his extensive 

 researches relative to crinoids. Studies finished during the year cov- 

 ered the material obtained by the Hamburg West Australian expedi- 

 tion of 1905, including the collection in the Yv^estern Australian 

 Museum and Art Gallery at Perth ; the collections of the Royal Zoo- 

 logical Museum at Berlin and the Hamburg Museum ; and the arctic 

 species belonging to the Zoological Museum in Copenhagen. Mr. 

 Clark also brought nearly to completion the second part of his mono- 

 graph on recent crinoids, comprising the anatomy other than skeletal, 

 the development, the comparative study of the young, and allied sub- 

 jects; and continued Avork on the crinoids collected by the Danish 

 steamer Ingolf and the nonarctic crinoids in the Museum at Copen- 

 hagen. Studies were likewise begun on the crinoid collections made 

 by the German South Polar expedition in the Gauss; by Prof. Franz 

 Doflein on his East Asiatic expedition, including the Japanese ma- 

 terial of Prof. L. Doderlein ; and by Capt. Suensson in eastern Asia, 

 belonging to the Museum in Copenhagen. Mr. Clark furthermore 

 prepared a preliminary paper on the salinity of the surface water in 

 the eastern part of the north Pacific Ocean with reference to its bear- 

 ing on the distribution of the marine life of the region. 



Dr. Harriet Richardson, collaborator, worked uji for the Museum 

 of Natural History at Paris, France, the isopods represented in the 

 collections of several polar expeditions and those obtained during an 

 expedition to Colombia by Dr. O. Fuhrmann and Dr. Eug. Mayor, of 

 Neuchatel, Switzerland. She also studied the isopods obtained in 

 Jamaica by Dr. E. A. Andrews, Dr. C. B. Wilson and Dr. Thomas 

 Barbour, and identified many species in the collections of the Mu- 

 seum, besides describing a number of new species. 



Among specialists not connected with the Museum who visited the 

 division in furtherance of their researches were Dr. Robert T. Jack- 

 son, of Cambridge, Mass., who is working on the anatomy of echi- 

 noids; Mr. A. A. Doolittle, who is studying fresh-water copepods; 

 and Miss Julia McMillan, who is conducting investigations on pro- 

 tozoa. 



Many well-known naturalists^ as heretofore, have given their 

 services gratuitously toward the working up of material belong- 

 ing to this division, and to this generous cooperation is largely 

 due the excellent progi-ess which is being made in the identification 



