40 



WNl'AL REPORT OF THE 



REPORTS ON THE LOWER INVERTEBRATES. 

 ECHINODERMS. 



By Hubert Lyman Clark. 



The work on the card catalogues of ophiurans, Echini, and 

 holothurians has occupied most of the time during the past year. 

 While only a small part of the holothurians has been catalogued, 

 the work on the Echini has been carried nearly through the Regu- 

 lares and the catalogue of the ophiurans has been completed. 

 The collection of ophiurans includes some eighteen thousand 

 specimens of more than seven hundred species. There are more 

 than a hundred holotypes and nearly a hundred and fifty cotypes 

 of ophiurans. 



A report on the Echinoderms of Peru has been prepared for 

 the Ministerio de Fomento of the Peruvian government. It is 

 based upon a collection made in 1907-1908 by Dr. Robert E. Coker 

 and presented to the Museum by the Peruvian government. 

 There are 268 specimens of 21 species, and they form the chief 

 addition of the year. There were no important additions from 

 exchanges, but a very valuable series of flexible sea-urchins 

 (Echinothuridae), 49 specimens of nine species, was received 

 from the Linked States National Museum. Other donations 

 have been received from Messrs. W. B. Benham, T. S. Hall, R. T. 

 Jackon, and S. B. Warner. A fine series of echinoderms was sent 

 to the Frankfort Museum in return for a desirable lot of reptiles. 



Publications. August 1, 1909- July 31, 1910. 



Alexander Agassiz and Hubert Lyman Clark. 



Hawaiian and other Pacific Echini. The Echinothuridae. Mem. 

 M. C. Z., November, 1909, vol. 34, p. 135-206, 30 pis. 

 Hubert Lyman Clark. 



Scientific Results of the Trawling Expedition of H. M. C. S. 

 "Thetis," off the coast of New South Wales, in February and 

 March, 1898. Echinodermata. Australian museum, Memoir 

 IV, part 11, 11 August, 1909, p. 517-564, 12 pis. 



