252 



CHAS. W. HARGITT. 



no signs of the development of gonads, a condition almost certain 

 to have been found in case the gonophores remain sessile. 



The following diagnostic characters will serve to distinguish 

 the species, at least so far as the hydroid phase is concerned, for 

 which the name Syncoryne linvillei is proposed : 



Trophosome. Colony growing in tufts, sparingly branched, to 

 a height of 15 to 30 mm., and with the same general aspects as 

 characterize 6". mirabilis Ag. Hydranths vasiform, with cone- 



'.I .V* " 



Portion of colony of Syncoryne linvillei about three times natural size. 



shaped proboscis ; tentacles definitely capitate, from I 5 to 30 in 

 number, and variously distributed over the proximal third of the 

 hydranth body. Perisarc much as in $". mirabilis, plain, or with 

 only the slightest trace of any annulation, ending somewhat 

 abruptly below the base of hydranths, proximal or basal portion 

 dense or brownish in color. Hydrorhiza more or less reticu- 

 lated, forming a loose network over the substratum. In all the 

 type specimens both hydrorhiza and hydrocaulus were enmeshed 

 in a dense sponge-like mass, though its exact nature is doubtful. 

 Gonosonic. Medusa buds borne on body of hydranth, usually 

 in small clusters among the bases of the tentacles and supported 

 by a single peduncle, the terminal specimen always maturing 



