400 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



A third specimen has 44 arms 110 mm. long. The extra axillaries are usually 

 next the midradial line. The cirri have 51-55 segments and are from 40 to 45 mm. 

 long. 



A fourth example has 44 arms 110 mm. long. The cirri have 48-57 segments and 

 are 40 to 43 mm. long. 



Another specimen has 36 arms 90 mm. long. 



Other specimens have 38 (1), 40 (3), 41 (1), 42 (2), 43 (3), 44 (1), 45 (4), and 46 (3) 

 arms, which are usually from 100 to 110 mm. long. 



Abnormal specimen. In a specimen from the Danish expedition to the Kei 

 Islands station 90 with 46 arms 90 mm. long one of the arms, the outermost arm on one 

 of the postradial series, has the tenth brachial bearing both the continuation of the 

 arm and on the outer side another arm about two-thirds as large, which is directed 

 obliquely distally at an angle of 45. 



Localities. Cebu, Philippines; Captain Hinge [Hartlaub, 1890, 1891 ; A. H. Clark, 

 1907, 1909, 1912, 1918] (1, H. M.). 



Danish expedition to the Kei Islands; Dr. Th. Mortensen; station 20; about 50 

 meters; sand and shells; April 14, 1922 (1). 



Danish expedition to the Kei Islands; Dr. Th. Mortensen; station 90; Sebesi 

 Strait, between Java and Sumatra; 36 meters; hard bottom; August 1, 1922 (24). 



Geographical range. From the Philippines southward to the Kei Islands and 

 westward to the Sunda Strait, between Java and Sumatra. 



Bathymelrical range. From the shoreline down to about 50 meters. 



History. This species was described from a specimen from Cebu collected by 

 Captain Hinge under the name cf Antedon erinacea by Dr. Clemens Hartlaub in 1890 

 and was described and figured in the following year. 



Hartlaub said that Antedon erinacea is an undoubted new species, immediately 

 distinguished from all related species by the large number of spinelike pinnules that 

 surround the disk and also by the relatively short and numerous segments of these 

 pinnules. He said that the single species that in respect to the shortness and number 

 of segments in the proximal pinnules resembles erinacea is Antedon (Stephanometra) 

 indica, but that any confusion with this species is prevented because this form, in 

 contrast to erinacea, possesses only a small number of elongated and styliform pinnules. 

 He noted that erinacea differs from all similar species in the following points: It has 

 relatively very long cirri, which are composed of 50-60 segments; it possesses IVBr 

 series, and therefore a large number of arms; and lastly a feature that is very charac- 

 teristic the second syzygy is separated by an unusually long distance from the first. 



In my first revision of the old genus Antedon published in 1907 this species was 

 referred to the new genus Himerometra. In the revision of the family Himerometridae 

 published in 1909 I did not place Antedon erinacea definitely in any genus. I said that 

 it appears to represent a distinct generic type for which the name Oxymetra would be 

 appropriate. 



In a paper on the crinoids of the Hamburg Museum published in 1912 I gave 

 notes on the type specimen of Antedon erinacea, which I had examined in 1910, and 

 said that this species is most nearly related to that which I had recently described 

 under the name Selenemetra ( = Oxymetra) tenuicirra, which has similarly stiffened 

 and enlarged proximal pinnules; but in tenuicirra the pinnules are stouter proximally 



