MUSEUM OF COMPARATIVE ZOOLOGY. Ill 



Canda cornigera Pourt. 



Flabellate and resembling the former, but the branches are not so dense, 

 and not connected by radicles, which are only numerous near the foot and 

 attached to foreign bodies. Cells as in the other species, but the shield is 

 ramified like a pair of elk horns. Off Havana in 270 fathoms. 



Idmonea flexuosa Pourt. 



Branching irregularly, calcareous, white. Branches variously curved or 

 flexuous. Cells long, cylindrical, striated ; aperture rounded at the end of 

 a curved tubular projection, almost opposite, with a slight tendency to be- 

 come alternate. Resembles closely the fossil species Idmonea coronopus. 



02' Havana in 270 fathoms. 



Comatula (Alecto) Hagenii Pourt. 



Ten arms. Mouth central, with the five brachial grooves radiating from 

 it. Centre of disc convex, surrounded by about 30 cirrhi, each of which is 

 composed of 18 to 20 articulations, much longer than broad, smooth, of 

 nearly equal size throughout the whole length of the cirrhus. Cirrhi in 

 several circles. A small part of the second radial only visible, so that the 

 axial radial appears almost sessile. The radials of two contiguous arms, and 

 the first brachials of the same pair well separated down to the angle. Arms 

 convex on dorsal side. Syzygia composed of three or seldom four articula- 

 tions, with very obliquo joints, and very finely denticulated edges, better 

 recognized by the touch than by the eye. The first three or four pinnules 

 of the arms long and nearly equal, the pinnules of the middle of the arm 

 shorter than those of the base or extremity. Arms about three inches long. 

 Color pale greenish, turning white in alcohol. All the specimens had the 

 pinnules filled with eggs. Quite abundant in 100 fathoms off Sand Key. 



Comatula brevipinna Pourt. 



Ten arms. Mouth and anus not seen in the only specimen obtained. 

 About 1 5 cirrhi, with the same number of long articulations. Seven or 

 eight articulations to every syzygium. The two radials are visible, and 

 have, as well as the axial radials and the two first brachials, a smooth tu- 

 bercle in the middle. The same pieces are denticulated on the sides, the 

 denticulations meeting those of the collateral radials and brachials, so as 

 to close up the angle between them. A row of very small tubercles on 

 the proximal border of the radials and radial axials. The articulations of 

 the arms somewhat imbricate. First pinnule longest, with about twelve 

 joints. The other pinnules very short, having only five or six joints in the 

 middle of the arm, but lengthening out again near the end of the arm, the 

 last ones being tipped with a hook like the cirrhi. 



