498 ME. p. H. CARPENTER ON NEW 



joints ; tlie first three quite sliort, the fourth more than twice 

 as long as Avide, and the next four the longest, sometimes ex- 

 ceeding 2 mm. The following ones diminish slowly in size, but 

 exhibit no traces of any dorsal spines. 



Eadials partially visible. Eirst brachials nearly oblong, widen- 

 ing slightly, and then narrowing a little. Second brachials 

 quadrate, and appearing in a side view of the specimen to project 

 strongljr baclvAvards into the first brachials, as the surfaces of 

 both joints rise towards the middle of their line of junction. 

 The following joints have unequal sides, the fourth having a 

 syzygy and bearing a pinnule on the shorter side. In one spe- 

 cimen the pinnule is on the right side in all but the right ante- 

 rior ray ; and in the other in all but the two antero -lateral rays. 

 The seventh joint is more oblong ; and the eighth and following 

 joints become more distinctly unequal-sided, the breadth being 

 somewhat less than the length of the longer side which bears 

 the pinnule. Further out on the arms tlie length gradually in- 

 creases in proportion to the breadth, and the joints become more 

 and more cylindrical. 



The second syzygy is on the seventh, eighth, or ninth brachial ; 

 and the later syzygial intervals vary from one to four joints. 

 The lower pinnules are all about equal in length, and consist 



of some twenty joints. Except in the first four or five pinnules 

 all but the lowest joints are twice as long as broad, or slightly 



longer, and more transparent and glassy than the cirrus-joints. 



Ovaries short, not extending over more than three or four joints. 



Towards the arm -ends the pinnules gradually decrease in length 



and in number of joints. 



Mouth central. Disk and arm-bases rather closely plated, but 



the brachial ambulacra merely have irregular rods and networks of 



limestone at their sides. They lie close down between the muscles 



and show no traces of sacculi. Skeleton white. 



Disk 5 mm. in diameter. Eadial pentagon 4 mm. Spread 



probably about 15 cm. 



H.M.S. ' Challenger; 1874. Station 164. Lat. 34° 8' S. ; Long. 162° 0' 

 E. Depth 950 fms. Grey ooze. One specimen. 



Station 169. Lat. 37^34' S.; Long. 179° 22' E. Depth 700 fms. 

 Grey ooze. Two specimens. 



I have named this species after Prof. Semper of Wiirzburg, 

 to whom we owe the discovery during his residence in the 

 Philippine Islands of the type species of Eudiocrinm {E, indivisus). 



