A MONOGRAPH OF THE EXISTING CRINOIDS 487 



4 (3 + 4) series. The IVBr series are all 2. In Mortensen's specimen from off Jolo 

 in about 46 meters, 2 of the IIBr series, both on the same IBr series, are 2. 



In one of the specimens from Albatross station 5139 the centrodorsal is very small 

 and stellate, the 5 interradial processes being tipped by the well-roimded ends of the 

 basal rays which he wholly proximal to the radial ring. The narrow radial portion of 

 the centrodorsal wliich lies between the interradial processes is somewhat irregular, 

 retaining the last traces of obsolete cirrus sockets. The center of the dorsal pole is 

 occupied by a small shallow pit. 



The radials are very short, about five times as broad as the median length. The 

 radial portions of the centrodorsal just proximal to them are rather deeply sunken. 

 The proximal border of the radials is slightly convex — bowed down between the ends 

 of the basal rays. The outer fourth of the radials is slightly swollen. 



The IBri are trapezoidal, nearly three tinics as long as the very short radials, 

 proximally about three times as broad as the median length. The proximal border is 

 very slightly concave, and the distal border is straight. The lateral edges are in 

 contact throughout. The IBr2 (axillaries) are triangular, only slightly longer than the 

 IBri, about three times as broad as long. The anterior angle is greater than a right 

 angle, and the lateral angles are verj' sharp. 



The 10 IIBr series are 4 (3 + 4). 



Of the 2 specimens from the Danish expedition to the Kei Islands station 20, one 

 has about 90 arms 130 mm. long and the cirri VIII, 12-13. The other specimen is 

 small. One of the specimens from station 30 is small, with about 100 arms which are 

 about 100 mm. long. The 10 IIBr series are all 4 (3 + 4). Of the 20 IIIBr series, 

 19 are 2 and 1 is 4 (3 + 4). The centrodorsal is greatly reduced and stellate. The 

 other specimen is small but well developed. The example from station 40 is small, 

 with about 100 arms about 100 mm. long. All of the IIBr series are 4 (3 + 4) and all 

 of the IIIBr series are 2. The IVBr series are mostly 2. The outermost division 

 series are usually 4 (3 + 4). The centrodorsal is greatly reduced and sharply stellate. 



Abnormal specimen. — One of the specimens from Albatross station 5249 is 4-rayed, 

 the anterior ray being absent. 



Localities. — Albatross station 5248; Gulf of Davao; Lanang Point bearing S. 33° 

 W., 0.4 mile distant (lat. 7° 07' 25" N., long. 125° 40' 24" E.); 33 meters; coral; 

 May 18, 1908 [A. H. Clark, 1909] (3, U.S.N.M., 35050, 35098). 



Albatross station 5249; Gulf of Davao; Lanang Point bearing N., 1 mile distant 

 (lat. 7° 06' 06" N., long. 125° 40' 08" E.); 42 meters; coral and sand; May 18, 1908 

 [A. H. Clark, 1909] (2, U.S.N.M., 25467, 35030). PI. 56, fig. 162. 



Albatross station 5254; Gulf of Davao; Linao Point bearing N. 44° E., 0.7 mile 

 distant (lat. 7° 05' 42" N., long. 125° 39' 42" E.); 38 meters; sand and coral; May 

 18, 1908 [A. H. Clark, 1909] (4 + , U.S.N.M., 34999, 35017, 35020). 



Albatross station 5251 ; Gulf of Davao; Linao Point bearing N. 32° E., 1.1 miles 

 distant (lat. 7° 05' 12" N., long. 125° 39' 35" E.); 36 meters; coral; May 18, 1908 

 [A. H. Clark, 1909] (3, U.S.N.M., 35102). 



Albatross station 5250; Gvdf of Davao; Linao Point bearing N. 22° E., 1.1 miles 

 distant (lat. 7° 05' 07" N., long. 125° 39' 45" E.); 42 meters; May 18, 1908 [A. H. 

 Clark, 1909] (1, U.S.N. M., 35052). 



