A MONOGRAPH OF THE EXISTING CRINOIDS 371 



pedinata he inserted the reference to Miiller's original description of purpurea without 

 comment. 



Thanks to the kindness of Drs. W. Weltner and R. Hartmeyer, of the Berlin 

 Museum, I was enabled to examine the type of Miiller's Aledo purpurea, and in 1910 

 I published a redescription of it accompanied by a figure, recognizing it as a valid 

 species near Comatula pedinata. 



In a memoir on the crinoids of southwestern Australia, published in 1911, based 

 upon the collection made by the Hamburg southwest Australia Expedition in 

 1905, I recorded and gave notes on a number of specimens, and also gave a detailed 

 account of the occurrence of the species on the Australian coasts. In the same year 

 in a monograph on the crinoids of Australia I recorded and gave notes on others 

 from Queensland in the collection of the Australian Museum. In another paper I 

 mentioned the specimen in the Paris Museum from the voyage of P6ron and Lesueur 

 in 1803. 



In 1912 I recorded the specimens in the Berlin Museum, which include Miiller's 

 original type and many of those from the Hamburg southwest Australia expedition 

 which I had described in the previous year. I also recorded those in the Hamburg 

 Museum, including some from the Abrolhos and others from the Hamburg southwest 

 Australia expedition. In my monograph on the crinoids of the Indian Ocean I gave 

 the geographical and bathymetrical distribution of this form. 



In 1913 I recorded and gave notes upon additional specimens from the collection 

 of the Hamburg southwest Australia expedition, and also recorded the specimens in 

 the British Museum. In the same year Reichensperger recorded and described 

 some specimens which had been collected by Dr. H. Merton in the Aru Islands in 

 1908. 



In 1914 I recorded some specimens which had been collected by the Endeavour 

 on the coasts of southwestern Austraha, and in 1915 I discussed the distribution of 

 this form on the Australian coasts. 



It was in 1915 that Dr. Hubert Lyman Clark pubHshed his detailed account of 

 the occurrence, habits, and reactions of this species as he found it in the Murray 

 Islands, Torres Strait, in 1913. 



In 1918 I gave a description of the numerous specimens which had been collected 

 by the Sihoga mostly in the Dutch East Indies in 1899-1900, and in 1919 Dr. Torsten 

 Gisl^n described the material which had been collected in northwestern Australia 

 by Dr. Eric Mjoberg in 1911. 



GisMn fotmd a number of specimens which were intermediate in their characters 

 between pedinata and purpurea, and therefore treated the latter as a variety of the 

 former. 



In 1921 Dr. H. L. Clark gave a detailed account of this species in connection 

 with his work on the echinoderm fauna of Torres Strait, and in 1923 he remarked 

 that the differences between purpurea and pectinata are certainly not specific. 



In 1926 Doctor Clark recorded and published notes upon 3 specimens from the 

 Great Barrier reef which had been collected by Mr. W. E. J. Paradice, the surgeon 

 of the Geranium, a sloop of the Royal Australian Navy, which had been engaged in 

 Great Barrier reef investigations in 1924. At the same time he remarked that ho 



