A MONOGRAPH OF THE EXISTING CRINOIDS 57 



The cirri are about XL, about 70, about 45 mm. long. They are moderately stout 

 and only slightly tapering. They are somewhat compressed laterally and when dry 

 have the appearance of ivory. The first 5 or 6 segments are short, the next longer than 

 broad and the 3 or 4 following about as long as broad. The remainder are shorter, 

 especially toward the end of the cirri, men viewed from the side the am have a 

 deeply serrate dorsal profile from about the fifteenth segment on, resulting from the 

 presence of dorsal tubercles. There arc no true spines except on the penultimate 



"^The radials are plainly visible in the interradial angles. The IBr, are short and are 

 entirely united laterally. The IBr 2 (axillaries) are rhombic. The IIBr series are 2. 

 The division series and first brachials have sharply flattened sides. 



The 20 stout arms, which have an uneven dorsal surface, are probably about i mm. 

 Ion- The first brachials are short, rhombic, and laterally united interiorly The 

 second brachials are a good deal longer than the first and are longer exteriorly than 

 nteriorly. The first syzvgial pair (composed of brachials 3+4) is approximate! as 

 Ion "as broad. The following 6 or 7 brachials are bluntly wedge-shaped and then 

 comes a series of triangular brachials of which the distal edge overlaps the base of 

 ^brachial following with alternating lateral processes. Farther out t , brach.a s 

 become wedge-shaped again, finally becoming more and more oblong All the bi achials 

 She exertion of the first two have produced and overlapping finely serrate d.stal 

 Sges The distal portion of the arm has a sharp dorsal longitudina carina tiom 

 Syzygies occur between brachials 3 + 4, again from between brachials 19 + 20 to 

 between Sacbials 26 + 27 (usually between brachials 26 + 27) and dually , _mterval 

 of 4-8 muscular articulations. The syzygial unions are not smooth exteriorly, but 

 are almost the same as the muscular articulations. 



P and P. are slender and taper rapidly from the somewhat broadened basal 

 segments; they are about 11 mm. long with 15-20 segments the majority of which are 

 elongated and cylindrical. The pinnules of the three following pairs decrease gradually 

 n Tengtl TbJsmallest pinnukis P d , which is only 4 mm. long. The segments o 

 these pinnules are flatter and broader than those of the pinnules of the first pa 

 (P?and P.). The following pinnules reach a length of 11 mm. and are remarkable 



f ° r ^it^T^'oi the pinnules is provided with well-developed side and 

 covering plates. Sacculi are few and small. 

 The disk is 14 mm. in diameter. 



The skeleton is brownish white, the disk dark brown. 



Notes.-As Dr. Hartlaub said, the type specimen is badly broken All la, 

 and cirri are broken off, and in general the pinnules are not F^ On 

 proximal portion of the animal and the arm bases are well preserved. I ha, e examined 

 the tvoe specimen, which was well described by Hartlaub. 



L P cX-Japan; Dr. Franz Martin Hilgendorf: Dr. Hilgendorf tol, Dr. art aub 

 personally hat according to his recollection the specimen came from deep water 

 [Hartlaub, 1890, 1891; A. H. Clark, 1907, 1909, 1912, 1915, 1918; G.slen, 1934] (1, 



Berl ^ 2 -This species was described under the name of A*** "#*£*»* 

 Clemens Hartlaub in 1890, and was described and figured m the following year. 



843803—50 



