A MONOGRAPH OF THE EXISTING CRINOIDS 359 



in his synonymy. He also gave the localities represented by the specimens in the 

 Alert collection, which he had studied at the British Museum, and included refer- 

 ences to Bell's report in the synonymy. 



Carpenter placed Actinometra curningi not in the Solaris group with pectinata 

 but in the Echinoptera group consisting of 10-armed species in which the elements of 

 the IBr series are united by synarthry instead of by syzygy. He thus entirely over- 

 looked the correspondence between cumingii and pectinata. 



In 1891 Dr. Clemens Hartlaub recorded two specimens which had been collected 

 by Dr. J. Brock at Amboina, another from the China Sea in the Gottingen Museum, 

 and two from Cooktown in the Stuttgart Museum. In 1894 Prof. F. J. Bell recorded 

 a number of specimens from northwestern Australia, in 1895 Prof. Rene Koehler 

 recorded one from Billiton, in 1898 Prof. Ludwig Doderlein recorded the species 

 from Thursday Island, and in 1900 Prof. Georg Pfeffer recorded it (as Actinometra 

 pectinata and also as Antedon cumingii) from Ternate. 



In the original description of Comanthus [Comatulides] decameros (1908) I com- 

 pared it with Comanthus cumingii from the East Indies. This last was in reality the 

 broad-armed form of Comatula pectinata, the specimens being those from the Philip- 

 pines mentioned below. 



In 1908 I recorded a number of examples of pectinata from two stations in the 

 Philippines, and from the Philippines without locality. Individuals of the broad- 

 armed type, misidentified as Comanthus cumingii, were also recorded from two 

 stations. The two supposed species were compared in considerable detail, and it 

 was mentioned that a specimen from Java identified by Carpenter was at hand for 

 comparison. This specimen was the Actinometra affinis Liitken, MS., belonging to the 

 Copenhagen Museum. 



In 1909 I recorded a specimen from another Albatross station in the Philippines. 

 In another paper I discussed at length the articulation between the elements of the 

 IBr series and the first 2 brachials which I described as an exceedingly close synarthry 

 and not a syzygy. In a third paper I gave a detailed description of the type specimes 

 of Actinometra affinis from Java, at the same time recording and giving notes upon a 

 large number of specimens from Singapore and calling attention to the curious di- 

 morphism in the arms of this species, which is similar to that seen in the Caribbean 

 Comactinia echinoptera. The possible bearing of the individuals with extremely long 

 and attenuated arms on the systematic interpretation of Uintacrinus was discussed. 



In a redescription of the type specimen of Muller's Alecto purpurea published 

 in 1910 I considered in detail the relationship of pectinata with this form. 



In 1911 I recorded some hitherto unnoticed specimens in the collection of the 

 Australian Museum from Albany Passage and Port Molle, and others from Australia 

 without definite locality. I also recorded one labeled Port Jackson. Various notes 

 on the arm structure were given, and it was said that an examination of the type 

 specimen of Muller's Comatula cumingii showed it to be a young individual of pecti- 

 nata. In other papers I discussed in detail the distribution of this species on the Aus- 

 tralian coasts, recorded specimens from two additional Albatross stations in the 

 Philippines, and an example of the broad-armed type without locality in the Leyden 

 Museum. 



