NO. 1798. CRINOIDS COLLECTED BY THE ALBATROSS— CLARK. 557 



present; the cirri are XXX, 17-21 (usually 18-19); the tubercles on 

 the division series and lower brachials are not quite so prominent as 

 in the type. 



PACHYLOMETRA SMITHI (A. H. Clark). 



Station 5282. — Three specimens; one has twenty-five arms 150 

 mm. long; another has thirty arms 140 mm. long, one IIBr series 

 dividing both interna,lly and externally and another not dividing at 

 all; the third has thirty-three arms 110 mm. long, three of the (inter- 

 nally developed) IIIBr series bearing on the innermost side IVBr 

 series of 2 (1 + 2). 



Station 5348. — Twenty-two specimens, medium sized or small, with 

 from nineteen to twenty-two arms, in the larger from 125 mm. to 135 

 mm. in length. 



In the original description of this species ^ the arm length is given 

 as "60 mm.;" this is an error for 160 mm. 



PACHYLOMETRA PATULa'(P, H. Carpenter). 



Station 5356. — Three specimens; one has fourteen arms about 170 

 mm. long and cirri XXII, 19-22, about 30 mm. long; the opposing 

 spine is single, large and prominent; another has sixteen arms about 

 170 mm. long and cirri XX, 18-20, 30-33 mm. long, the opposing 

 spine large, and prominent, usually forked at the tip ; the third has 

 twenty arms, the cirri XXV, 17-22, 30 mm. to 37 mm. long; the 

 opposing spine is single. 



PACHYLOMETRA FLEXILIS (P. H. Carpenter). 



In the original description of this species^ the spread is given as 

 "55 cm.;" this is an error for 35 cm. 



Genus GLYPTOMETRA. 

 GLYPTOMETRA TUBEROSA (P. H. Carpenter). 



Station 5367. — One specimen with eighteen arms; six of the IIBr 

 series are 4 (3 + 4), and one is 2, the last bearing (externally) a IIIBr 

 4 (3 + 4) series. 



Station 5406. — One specimen with twelve arms resembling the 

 preceding, but the dorsal carination of the arm bases is slightly 

 more prominent; the two IIBr series are 2. 



Station 5431. — Twenty-two specimens; seventeen of these are 

 ten armed, the arms being usually between 100 mm. and 115 mm. in 

 length; the arms of the largest are 140 mm. long; three are eleven 

 armed, the IIBr series being 2; one is twelve armed, the two IIBr 

 series being 2; the last is a large six-rayed specimen. 



a Charitometra smithi A. H. Clark, Smiths. Misc. Coll. (Quarterly Issue), vol. 52, 

 pt. 2, p. 227 (229). 

 ^ Challenger Reports, vol. 26, Zoology, p. 218. 



