A MONOGRAPH OF THE EXISTING CRINOIDS 69 



Palmata group on the other. The lateral flattening of the lower brachials is scarcely 



more distinct than in Antedou {Dichrometra) flagellata or Antedon brevicuneata = 



Lamprometra palmata) ; but P, has prismatic lower segments and the ambulacra of the 



dTsk arms, and pinnules are well plated, though the interpalmar areas of the disk are 



compar^ively bare. The genital pinnules are not specially distmguished however 



S tleir shortness, and their glands are not protected by any speeia pavement 



of Plates as in Antedon Peri.sometra) flexilis and A. (P.) patula, though here is an 



amblcrd skeleton above them winch is less completely differentiated than m he 



SnlrTaTe pinnules, Dr. Carpenter said that the presence of blunt spines on the 



Iter c r us egments also distinguishes this species from A. {P.)jUxd*, A (P. ***, 

 la ,er C1 rus seg ^ smooth ^ ^ ^ ^^ rf a morc 



robust nature. 



In my first revision of the old genus Antedon published m 1907 compressa was 

 assigned to the genus Charitometra. Early in 1908, in a paper on new genera and 

 spedes of unstalked crinoids, I remarked that compressa, which I had placed m Chanto- 

 mtrashZd have been referred to the genus Thalassometra Later in the same year 

 m describmg Thalassometra fisheri I compared it with Thalassometra compressa o 

 LSn pines." The PhUippine specimens at hand represent P. granulata which at 

 that thTl had not distinguished from compressa. Early in 1909 compressa was referred 



t0 th Dr ne C V le g m n en S s HaTtTa^early in 1912 discussed the Spinifera group of Antedon in 

 considerabe detail, including in it 18 species, among them Antedon compressa. In 

 my m moh on the' crinoids of the Indian Ocean published later in - -me yea 

 listed Parametra compressa, giving the synonymy and range. The locality Philip 



^"IntlTin a^paTer^he crinoids in the British Museum, which I had examined 

 in 1910 I recorded and gave notes on two specimens of Parametra compressa from 

 ChaZaer station 192 and under the name of Parametra granuhta, recorded and gave 

 2te on one specimen from station 201. In my report upon the unstalked crinoids of 

 the"!; Expedition published in 1918 I recorded and described in detail a specimen 



of ^^XTStT 9 Cbhled additional notes upon the two specimens in 

 the British Museum from Challenger station 192. 



PARAMETRA GRANULATA A. H. Clark 



Plate 7, Figure 25; Plate 10, Figures 31, 32 



[See also vol. 1, pt. 2, figs. 874-878, p. 435.] 



***. compressa (part) P. H. Carpenter, Ckallenaer Reports, Zool., vol. 20, pt. 60, 1888, p. 222 



r,ir:r S^/l^.^rS.nit.sonian Misc. Coll., vol. 52, pt. 2, 1008, p. 227 ^atross 



station 5110). , , r lf) nq r, 406 (Albatross stations 



Parametra compressa A. H. Clark, Proc U. S. Nat Mus. vol. g- 19 °- • /" \ 5523 _ 5536; 



reference to specimen in the B. M., UWUenjer stok , Tap. 90-D, 1914, pp. 



lower brachials) .-F. W. Clarke and Wheeler, U. S. Geol. Sun . trot, i 



