NORTH AMERICAN ALCYONARIA. 



547 



on tlie stem of the Gorgonid {Prwinoa willeyi). They were 

 preserved and forwarded to me in formalin. 



The stolon is in the form of flat anastomosing bands, spreading 

 out in places and fusing to form membranes. From the stolon 

 the zooids arise in a very irregular manner, in some places at 

 considerable intervals, in others close together. The stolon 

 follows the support in a quite irregular manner, and, so far as can 

 be determined from the material at my disposal, is never thickened 

 to form a sympodium. The zooids are never retracted into tlie 

 stolon, but they all show the tentacles contracted tightly over the 

 oval disc. They vary very much in size, large and small ones 

 being irregularly distributed on the stolon. 



Text-fioure 1. 



Spicules of Clavularia moreshii. X 360 diain. 



The larger zooids are from 7-10 mm. in length, with a diameter 

 of 2 mm. The crown of tentacles is never retracted into a calyx, 

 and the aboral surfaces of the eight tentacles formiag the apex of 

 the zooid, in the preserved state, therefore can always be seen. 

 The body-wall is smooth and cylindrical. It does not shew, as 

 preserved, the eight longitudinal furrows that have been described 

 in many other species of the genus. 



The spicules (text-fig. 1) are tuberculated spindles 0-15 mm.- 

 0"2 mm. in length by about 0-05 mm. in diameter, and do not 



