104 . BULLETIN OF THE 



Stephanocyathus variabilis Segdenza. 



Plate II. Fig. 2, 



Two specimens, one living and one dead, are referred to this species. They 

 are both larger than those figured by Seguenza, and differ slightly from his 

 description. There is no plicated rudimentary epitheca, and the costse remain 

 very flat and indistinct to the edge of the calicle, instead of becoming promi- 

 nent and cristiform. Otherwise there are no essential differences. 



The polyp seems to have been rather highly colored, dark purplish in 

 alcohol in all its parts except the larger tentacles, which are whitish. Ten- 

 tacles stout, forming a double circle at a considerable distance from the 

 mouth. Buccal disk radially plicated, and very tough. Diameter of largest 

 specimen, 48 mm. Height, exclusive of primary and secondary septa, 8 mm. 

 Height of primary septa, 5 mm. 



In 476 fathoms, off Martinique. 



Leptocyathus Stimpsonii Pourt. 



Both the long and the short varieties. 



Range from 92 to 400 fathoms, in two stations, off Havana and Grenada. 



Stephanotrochus diadema Moseley. 



Plate II. Fig. 1. 



One living and two dead specimens. The tentacles were remarkably full of 

 nematocysts, and must have been quite long. Those of the three first orders 

 are not very different from each other in size, and about equidistant from the 

 centre ; those of the fourth and fifth are smaller and farther removed. The 

 tentacular circle is quite distant from the mouth, having a large bare plicated 

 buccal disk. 



In 734 fathoms off Guadeloupe, and 1,200 fathoms in lat. 19° 7' N., 

 and long. 74^ 52' W. 



• Schizocyathus fissilis Pourt. 



Range from 56 to 170 fathoms, in seven stations, off Martinique, St. Lucia, 

 Grenada, and Barbadoes. 



Paracyathus laxus n. sp. 



Plate I. Figs. 9-11. 



Corallum turbinate, turgid, short-pedicellate, sometimes becoming free 

 when attached to a small object, which then becomes covered up by an 

 epithecal growth. Generally dark-colored. Costce not prominent, finely 

 granulated, and separated by a fine linear convex ridge. They are covered by 

 a very thin rudimentary epitheca, through which the granulations can be seen. 



