500 ME. p. H. CAEPENTEE 0^ IS^EW 



surfaces of both joints rise towards the middle line of their junc- 

 tion, so that in a side view of the specimen the second seem to 

 have strong backward projections into the first brachials. The 

 next four or five joints have unequal sides, the fourth being a 

 syzygy and bearing a pinnule on its shorter side. In the only 

 specimen with all the arm-bases preserved, one of them has the 

 first pinnule on the left side. The fifth and one or two follow- 

 ing joints also have the pinnule on the shorter side. The next is 

 more oblong, and its successor again a syzygy, with the pinnule 

 on its longer side. The succeeding joints have still more 

 markedly unequal sides, the breadth being about equal to the 

 length of the longer side. After the second syzygy there is an 

 interval o£ four or five joints between successive syzygia. 



The lowest pinnules are apparently tolerably equal, consisting 

 of some twenty stout joints, of which only a few middle ones are 

 longer than wide. Beyond the eighth brachial, the pinnule -joints 

 become relatively longer and thinner and the pinnules more slender. 

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



Mouth central or subcentral. Disk naked, 7 mm. in diameter. 

 Brachial ambulacra close down betAveen the muscles, with a few 

 supporting rods and networks of limestone, but no traces of 

 sacculi. Skeleton white. 



Diameter of radial pentagon 4| mm. 



H.M.S. ' Challenger,' 1874. Station 235. Lat. 34° 7 ' N.; Long, 138« 0' 

 E. Depth 565 fms. Mud. Three much mutilated specimens. 



It is witli some hesitation that I have separated this species 

 from the preceding one. It is altogether larger and more mas- 

 sive than E. Semperi, with a larger and more distinctly conical 

 centrodorsal and more numerous cirri. The first brachials have 

 larger muscle-plates for articulation with the radials and are 

 more trapezoidal in outline, so that the arm-base is distinctly 

 narrowed at the junction of its first two joints. The fourth and 

 next following joints are relatively shorter and more oblong thau 

 in E. Semperi, though the general proportions of the remaining 

 arm-joints seem much the same in the two cases. The position of 

 the first pinnule, i. e. whether on the right or left side of the arm, 

 does not appear to be a character of much importance, as the two 

 examples, of E. Semperi do not agree in this respect. One of them 

 has the first pinnule on the left side in two arms, but the other 

 only in one, as in the solitary specimen of E. japoniciis which has 

 the arm-bases at all well preserved. 



