ANNUAL REPORT OF THE 



REPORTS ON THE LOWER INVERTEBRATES. 



ECHINODERMS. 

 By Hubert Lyman Clark. 



During the past year, the greater part of the time has been given 

 to the completion of the work on the large collection of ophiurans, 

 made by the " Albatross" in the North Pacific Ocean. Similar 

 work has also been done for the Australian Museum, on the echino- 

 derms collected by the "Thetis" in 1898. Exchanges have been 

 effected with several museums and individuals, the most important 

 of which were with M. Thiery, Chaumont, France, fossil Echini; 

 with Dr. R. T. Jackson, Cambridge, selected series of Echini; 

 with Vassar Brothers' Institute Museum, Poughkeepsie, through 

 Mr. H. V. Pelton, a valuable cotype of Astrophyton australe Verrill; 

 and with the Royal Zoological Museum, Berlin, through Dr. 

 Robert Hartmeyer, some much-desired starfishes and Echini. 



In March, I visited Jamaica in search of certain Echini for Mr. 

 Agassiz, and a very satisfactory series of Echinoneus was secured; 

 also a considerable number of other echinoderms and of crustaceans. 



The remainder of the year has been devoted chiefly to the 

 labeling and cataloguing of the collections of ophiurans and Echini. 

 The principal additions to the collections have been as follows : — 

 From the United States National Museum, 2,644 ophiurans, of 149 

 species (104 new to the collection), and 135 Echini, of 18 species; 

 from the Australian Museum, 206 specimens of 39 species; from 

 the assistant's trip to Jamaica, 516 specimens of starfishes, ophiu- 

 rans, Echini, and holothurians ; from the exchanges about 150 speci- 

 mens of 75 species of Echini and starfishes; from the Marine 

 Biological Laboratory, Woods Hole, a small collection of echino- 

 derms from Miami, Florida, (purchase); a few ophiurans were 

 given by Messrs. A. S. Pearse and C. R. Stockhard. 



