FOREWORD 



Following the death of Mr. Austin Hobart Clark hi 1954 I was invited by the 

 authorities of the United States National Museum to complete the final part of volume 

 1 of this monograph. Most of the typescript was written about 1923, with the excep- 

 tion of the section on the Notocrinida which was done subsequent to 1938. There 

 were also insertions from material included in the following papers : 



A. H. Clark, Five new genera and two new species of unstalked crinoids. Proc. 

 U.S. Nat. Mus., vol. 83, pp. 245-250, 1936. 



A. H. Clark, Crinoidea. Sci. Res. Austral. Ant. Exped., vol. C8, No. 4, 1937. 



A. H. Clark, Sea lilies of the Okhotsk and Japan Seas. Explor. Mers U.R.S.S., 

 vol. 23, pp. 217-229, 1937. 



A. H. Clark, The family Antedonidae in the west tropical Atlantic. Mem. Soc. 

 Cubana Hist. Nat., vol. 14, pp. 139-159, 1940. 



A. H. Clark, A new species of the crinoid genus Cyclometra from South Africa. 

 Trans. Roy. Soc. S. Afr., vol. 33, No. 2, pp. 189-192, 1952. 



T. Gislen, Echinoderm Studies. Zool. Bidrag Uppsala, vol. 9, 1924. 



A. A. Schorygin, Echinodermata aus den Sammlungen der Expeditionen des 

 Wissenschaftlichen Meeresinstituts, etc. Ber. Wiss. Meeresinst. Moscow, Lief. 8, 1925. 



A. A. Schorygin, Die Echinodermen des Barentsmeeres. Ber. Wiss. Meeresinst. 

 Moscow, vol. 3, Lief. 4, 1928. 



G. Gorbunow, Zur Kenntnis der Echinodermenfauna des Franz-Joseph Landes, 

 etc. Trans. Arctic Inst. Leningrad, vol. 2, pp. 93-129, 1932. 



G. Gorbunow, Zur Kenntnis der Echinodermenfauna der Nordinsel Kiistengewaren 

 von Nowaja Semlja. Trans. Arctic Inst. Leningrad, vol. 7, pp. 41-69, 1933. 



G. Gorbunow, Die Echinodermata der nordlichen halfte des Karischen Meeres. 

 Trans. Arctic Inst. Leningrad, vol. 8, pp. 5-78, 1933. 



D. D. John, Three new crinoids from the Indian Ocean. Ann. Mag. Nat. Hist., 

 ser. 10, vol. 20, pp. 161-173, 1937. 



H. L. Clark, Echinoderms from Australia. Mem. Mus. Comp. Zool., vol. 55, 1938. 



D. D. John, Crinoidea, Discovery Rep., vol. 18, 1938 (subfamity Zenometrinae 

 only). 



Besides this Mr. Clark left notes of references to species to be included in this 

 volume from a number of other works published between 1923 and 1940. 



The remaining insertions of material were made by myself from a study of the 

 literature since 1923 mainly derived from the Zoological Record. Notable works 

 include the reports of the Discovery, B.A.N.Z. A.R. and Scotia expeditions by Dr. Dilwyn 

 John, that of the John Murray Expedition by Mr. Clark himself, and of Mortensen's 

 Japanese crinoids by Dr. T. Gisle"n. These papers as well as personal observations 

 occasioned a number of textual amendments which appear prefaced with my initials. 



One of the most difficult omissions to rectify was the provision of a key to the 

 subfamilies of the Antedonidae. These may have been quite distinct in 1917 when Mr. 

 Clark produced his key to them, but the many new species and genera since added 

 have obscured their limits so that it is no longer easy to separate them. Even the 



