A MONOGRAPH OF THE EXISTING CRINOIDS 319 



The color in alcohol is white. 



Notes. — Dr. Hartlaub sent me for criticism the proof of his plate 5 and, as he 

 mentions on page 300, I identified his second specimen of Antedon granulifera from 

 Martinique (fig. 9) as this form. 



This specimen is considerably smaller than the first (see under var. granulifera, 

 p. 330). While in the latter the IB^ is 4 mm. broad, in this it measures scarcely 3 mm. 

 But in spite of this the arms are of considerable length, one of them, measured with 

 a thread, reaching 140 mm.; it is broken at the tip and must have been 20 mm. longer. 

 The expanse of this specimen was estimated at about 310 mm. 



There are 16 arms. All the IIBr series are 4(3+4). There are no II IBr series 

 and one of the postradial series lack IIBr series. Hartlaub says that the ornamentation 

 is not dissimilar to that of the small specimen of var. granulifera from Blake station 

 34, though here the lower brachials are thickly beset with erect coarse spines which 

 are quite irregularly placed and partially, through fusion of several into one, become 

 more dentate. The largest spines are on the dorsal surface of the segments, the edges 

 of the brachials carrying smaller ones. On the division series the spines are markedly 

 smaller. On the IBr series a weak median ridge may be distinguished. 



In the four arms arising from a IBr axillary the sequence of the syzygies is as 

 follows: (1) between brachials 3+4, 14 + 15, 19+20, 25+26, 32+33, and 37 + 38; 

 (2) between brachials 3+4, 10+11, 15 + 16, 22+23, and 28+29; (3) between brachials 

 3+4, 5 + 6 (?), 12 + 13, 22+23, 29+30, and 37+38; (4) between brachials 3+4, 

 16+17, 19+20, 24+25, 32+33, and 38+39. 



In five arms arising from IIBr axillaries the syzygies are as follows: (1) between 

 brachials 1+2, 3+4, 10 + 11, 18 + 19, 26+27, and 32+33; (2) between brachials 

 1+2, 13 + 14, and 20+21; (3) between brachials 1+2, 12+13, and 19+20; (4) 

 between brachials 1+2, 10 + 11, 19+20, 27+28, and 32+33; (5) between brachials 

 1+2, 6+7, and 16 + 17. In a study of other arms Hartlaub found commonly a syzygy 

 between brachials 10+11, which was sometimes the second, sometimes the third syzygy. 



Pd is about 10 nun. long and is composed of about 30 short and broad segments. 

 Their dorsal edge, of which a broad strip is visible between the appressed arms, is 

 sculptured in the same way as the arm bases. P! on arms arising from a IBr axillary 

 is similar. The proximal pinnules are markedly shorter than those of the third 

 specimen (var. granulifera) from Martinique (see page 330). 



Dr. Hubert Lyman Clark referred one good specimen from the University of 

 Iowa's Bahama Expedition station 16 and arm fragments from station 9 to Crinometra 

 ornata. He said that the specimen and fragments of this Crinometra do not correspond 

 in detail with Hartlaub's description and figures, but it is better to refer them to the 

 same name than to introduce a new name into this already badly confused group. 



He said that the individual before him has the centrodorsal so thickly covered 

 with cirri that it is difficult to determine its size and shape. At the dorsal pole are a 

 few high, compressed, irregular granules and ridges. 



The cirri are about XX, 17-20. The penultimate bears a conspicuous opposing 

 spine while the 3-6 preceding have a similar but increasingly ill-defined dorsal projec- 

 tion near the distal margin. The distal margins, particularly of the basal segments, 

 are flaring so that they form a conspicuous socket for the next succeeding segment. 



