Ili — 



Zoantha Ellisii Uose. 1802 

 Zoanthus sociatus Lesueur, 1817 

 Zoanthus sociaìis de Blainville, 1830 

 Zoanthus nobilis Duch. and Mieli., 1860 

 Zoanthus danae (non Leeonte) Hertwig 1882 

 Zoanthus flosmarinus (non Duch. and Mieli.) 



MeMurrich, 1889a. 

 Zoanthus proteus, Verrill, 1000. 

 Whetlier the mere difference in number of the mesenteries is suf- 

 ficient to warrant the retention ot* Duchassaing and Michelotti 's Z. 

 flosmarinus as a species distinct froni sociatus can only he determined 

 by the study of abunrtant material of both speeies, but for the present 

 it seems advisablé to keep them distinct. 



Zoanthus Solanderi Lsr. 

 One colony of this l'orm, consisting of hall' a dozen polyps attached 

 to a piece of stone, occured in the collection, and it had with it labels by 

 both Duchassaing and De Filippi which read Zoanthus Solanderi, St. 

 Thomas. Two of the polyps were quite separate from the other four 

 and each was attached to the stone by a roundish piate of coenen- 

 chyme; the others arose in a bunch from the extremity of a short 

 stolon-like stalk. At first sight these bitter polyps presented an 



appearance like that of Isaurus l)u- 

 clwssaingi, the surface of the column 

 being covered by scattered tubercles 

 about 1 mm. in diameter, but sections 

 showed that the tubercles Avere really 

 small ascidians adhering to the sur- 

 face of the cuticle, which, apart from 

 the incrustation, was smooth, as 'in 

 the solitary polyps. 



The polyps were long and almost 

 cylindrical, enlarging slightly toward 

 the distai extremity. One of the so- 



Fig. 3 



Fiff. 4 



litary polyps measured 4.5 era. in height and had a diameter at the 



