A MONOGRAPH OF THE EXISTING CRINOIDS 117 



broad as long. Shortly after the transition segment the distal dorsal edge of the seg- 

 ments begins to become produced, rising up to form a sort of gable, which leans some- 

 what inward, with serrate sides and a blunt tubercle at the apex, but the dorsal surface 

 of the segments does not become generally carinate as is usually the case. 



The ends of the basal rays are visible as prominent, though small, tubercles in the 

 angles of the calyx. 



The radials are just visible beyond the edge of the centrodorsal ; they are more 

 or less covered with fine spines and have a finely serrate distal border. The IB^ 

 are very short, about four times as broad as long, convex proximally, concave distally. 

 The IBr 2 (axillaries) are rhombic with the sides concave, twice as broad as long, the 

 lateral edges shorter than those of the IBri. The elements of the IBr series and first 

 two brachials have somewhat everted and finely spinous edges, sometimes also scattered 

 fine spines on the dorsal surface and a thick development of fine spines along the lateral 

 margins, which are somewhat produced. 



The 10 arms are 130 mm. long. The first brachials are short, twice as broad as long 

 exteriorly, somewhat incised on the distal margin. The broadly rounded synarthrial 

 tubercles are moderately prominent. The second brachials are larger with a rounded 

 posterior process incising the first. The first syzygial pair (composed of brachials 3+4) 

 is from one-third to one-half again as broad as long and oblong. The next four brachials 

 are oblong, about two and one-half times as broad as long, those following becoming 

 obliquely wedge-shaped and then triangular, as long as broad, and wedge-shaped 

 again distally. The earlier brachials have everted and finely spinous distal ends. 

 The fourth and following brachials have the dorsal, but not the lateral, surface thickly 

 covered with fine spines which on the outer brachials become somewhat coarser and 

 are directed distally. Proximally as the brachials become wedge-shaped the distal 

 edge begins to overlap and the proximal edge to lose its eversion so that the later 

 brachials acquire strongly produced and very spinous distal ends. 



Notes. — In the original description I said that in A. eupedata (=valida) the second 

 and following brachials are thickly covered with minute spines, but these are evenly 

 distributed over the entire exposed surface, lateral as well as dorsal, and they are 

 neither so large nor so long as in this species. 



The specimen from Albatross station 5274 is somewhat larger than the others, 

 with the arms about 150 mm. in length. 



Crotalometra vera was briefly described as follows: 



The cirri have 62-69 segments and are 60 mm. long. The longest cirrus segments 

 are from one-third to one-half again as long as broad; the sixth or seventh is a transition 

 nent. 



The edges of the ossicles of the IBr series and of the earlier brachials are only 

 very slightly, if at all, everted and are either armed with exceedingly fine spines or 

 quite smooth. The spines within the distal angle of the axillaries and on the dorsal 

 surface of the ossicles are exceedingly short and fine and difficult to detect. 



The 10 arms are about 130 mm. long. 



Except for the features noted this species agrees with A. propinqua. 



Localities.— Albatross station 5274; China Sea in the vicinity of southern Luzon; 

 Malavatuan Island (N.) bearing S. 73°30' E., 17.5 miles distant (lat. 13°57'30" N., 



