A MONOGRAPH OF THE EXISTING CRINOIDS 509 



in diameter. Its sides are strongly inclined inward toward the dorsal pole. The 

 cirrus sockets are arranged in 2 and a partial third irregular closely crowded alter- 

 nating rows. The cirri are composed of 20-26 segments, and are from 18 to 23 mm. 

 in length. 



The larger of the 2 specimens from Ito has 38 arms 130 mm. long. All of the 

 IIBr series are 4 (3+4). The 17 IIIBr series are all 2. The single IVBr series is 

 4 (3 + 4). There are no fully developed cirri. 



The smaller specimen has 36 arms. 



The specimen from Fukuura in about 150 meters is typical, with 40 arms. The 

 10 IIBr series are 4 (3 + 4), and the 20 IIIBr series are 2. 



Of the 2 specimens from Fukuura without indication of depth, 1 is large, with 40 

 arms. Four of the IIIBr series are 4 (3 + 4). The cirri have 26-28 segments, and are 

 from 25 to 30 mm. in length. 



The other is very small, with 15 arms 23 mm. long. Four of the IIBr series are 

 4 (3 + 4), and 1 is 2. The cirri have 10 segments and are 5 mm. long. 



One of the specimens from Sagami Bay is a finely developed example, with 

 46 arms 180 mm. long. The 10 IIBr series are all 4 (3 + 4). Nineteen of the IIIBr 

 series are 2, and 1 is 4 (3 + 4). One of the IVBr series is 2, the remainder being 4 

 (3 + 4). The cirri are about XXXII, 20-24, from 20 to 25 mm. long. 



Another specimen has 43 arms 140 mm. long. All of the IIBr series are 4 (3 + 4), 

 all of the IIIBr series are 2, and the 3 IVBr series present are 4 (3 + 4). The centro- 

 dorsal is 9 mm. in basal diameter, low, with a concave dorsal pole 4 mm. in diameter. 

 The cirri, of which only II remain, are composed of 25 segments and are 23 mm. long. 

 Rudimentary cirri are very numerous. 



The third specimen is typical, with 39 arms. 



One of the 2 specimens from off Amoy has 48 arms 140 mm. long. All the IIBr 

 series are 4 (3 + 4) and all the IIIBr series are 2; the IVBr series are 4 (3 + 4). The 

 division series are broad, but are rather strongly convex dorsally and are laterally 

 separated by a narrow perisomic strip. The brachials have the distal edge produced 

 and overlapping and armed with fine spines. The centrodorsal is 4 mm. in diameter; 

 the dorsal pole is strongly concave. The cirri are very numerous and well developed, 

 XLIII, 23-28 (usually 26), up to 30 mm. in length. The longest earlier segments are 

 usually slightly longer than broad, varying from about as long as broad to one-third 

 again as long as broad. The cirri are rather slender. 



The other specimen from Amoy has 42 arms 125 mm. long. The 10 IIBr series 

 are 4 (3 + 4); of the 19 IIIBr series, 18 are 2 and 1 is 4 (3+4). The following series 

 are 4 (3 + 4). The division series are rather broad, well rounded dorsally, and 

 laterally separated by narrow strips of perisome. The cirri are XXVI, 22-24, up to 

 23 mm. in length. The tenth or eleventh is a transition segment. 



Localities. Sagami Bay, southern Japan; between Ito and Ilatsushima Island; 

 about 150 meters; Doctor Haberer, March, 1903; original Nos. 4201, 4205, and 

 4217 [A. H. Clark, 1915, 1916, 1918] (3, U.S.N.M., 35756; Munich Mus.). PI. 60, 

 fig. 169. 



Ito, Sagami Bay; Doctor Haberer, 1904 [A. H. Clark, 1915, 1916, 1918] (2, 

 Munich Mus.). 



