A MONOGRAPH OF THE EXISTING CRINOIDS 147 



Notes. — Of the five specimens from Albatross station 5367 one has 20 arms 85 mm. 

 long and the cirri 40-47 mm. long; all the IIBr series are 4(3+4). Another has 19 

 arms 115 mm. long and the cirri 40-45 mm. long; of the nine IIBr series seven are 

 4(3+4) and two are 2. Another has 23 arms 110 mm. long, and the cirri 40-45 mm. 

 long; the ten IIBr series and the three IIIBr series are 4(3+4). Another has 19 arms; 

 of the nine IIBr series six are 4(3+4) and three are 2. The fifth has 20 arms with the 

 ten IIBr series all 4(3+4). 



One of the three specimens from Albatross station 5503 has 20 arms 120 mm. long; 

 another has 20 arms 115 mm. long; and the third has 19 arms 130 mm. long. 



Of the two specimens from Albatross station 5506 one has 19 arms 90 mm. long and 

 the other is small with 15 arms. 



The specimen from Albatross station 5280 has 21 arms 130 mm. long and the cirri 

 50-60 mm. long; there are four IIBr 2 series, two of which bear externally IIIBr 4(3 + 4) 



series. 



A small specimen from Albatross station 5116 has 11 arms 60 mm. long; one IIBr 



4(3+4) series is present. 



All the specimens from the Philippines are somewhat smaller and more slender 

 than the type specimen in the Indian Museum, with which they were compared directly. 

 The division series and lowest brachials are usually slightly more spinous and thus more 

 nearly like the brachials immediately following; there is, however, considerable variation 



in this feature. 



Abnormal specimen.— The specimen from Albatross station 5536 has 22 arms 160 

 mm. long, and the cirri 40-50 mm. long. Of the nine IIBr series eight are 4(3+4) and 

 one is 2. The axillary of one of the IIBr 2 series bears on its inner face another axillary 

 and on its outer face the first elements of a IIIBr 2 series which is supported equally 

 by the IIBr axillary and by the outer side of the IIIBr axillary. 



Localities.— Investigator; Malay Archipelago ; 55 meters [A. H. Clark, 1909, 1912, 

 1915, 1916, 1918] (2, U.S.N.M., 35577; I. M.). 



Albatross station 5367; North Balabac Strait; Balabac Light bearing S. 65° W., 14.3 

 miles distant (lat. 8°06'00" N., long. 117°17'10" E.); 124 meters; coral sand; January 

 5, 1909 (5, U.S.N.M., 35571, 35948). 



Albatross station 5504; in the vicinity of northern Mindanao; Macabalan Point, 

 Mindanao, bearing S. 39° E., 6 miles distant (lat. 8°35'30" N., long. 124°36'00"^ E.); 

 366 meters; bottom temperature 12.4° C; green mud; August 5, 1909 [A. H. Clark, 

 1911, 1912, 1915, 1918] (1, U.S.N.M., 35573). . 



Albatross station 5503; in the vicinity of northern Mindanao; Macabalan Point 

 Light, Mindanao, bearing S. 31° E., 6.6 miles distant (lat. 8°36'26" N., long. 124°36'08'' 

 E.); 413 meters; bottom temperature 11.7° C; green mud; August 4, 1909 [A. H. 

 Clark, 1911, 1912, 1915, 1918] (3, U.S.N.M., 35570). 



Albatross station 5501; in the vicinity of northern Mindanao; Macabalan Point 

 Light, Mindanao, bearing S. 35' E., 8.2 miles distant (lat. 8°37'37" N., long. 124°35'00' 

 E.); 391 meters; bottom temperature 12.4° C; fine sand and gray mud; August 4, 

 1909 (1, U.S.X.M., 35959). 



Albatross station 5506; in the vicinity of northern Mindanao; Macabalan Point, 

 Mindanao, bearing S. 41° E., 12.2 miles distant (lat. 8°40'00" N., long. 124°31 45 E.) ; 



