222 



Panceri an eine Phyllactinia vergeben ist). Colnmn firm in texture, 

 low, broad, crowdedly covered with elevated, subtentaculiform tu- 

 bercles or papillae, which have round inflated tips, those on the 

 sides simple or two- or three-lobed ; tbose at the margia of the disk 

 elongated. pedunculated, the end divided into 2 to 6 rounded lobes. 

 Tentacles numerous, rather long , the inner ones largest. Disk 

 broad, with a naked ai'ea or fossa between the tentacles and the 

 margin. 



Calliactis Verr. Column very changeable in form, in füll 

 expansion elevated, subcylindrical, with a broadly expauded base, in 

 contraction forming a broad, low, flattened cone or convex disk. 

 Surface nearly smooth in expansion, except near the base, where 

 there are one or more transverse rows of conspicuous lateral po- 

 res or ciuclidae, which have thickened, permanently raised borders. 

 Basal margin below the pores thin and expanded, usnally with an 

 additional internal lamella intercalated between the larger ones that 

 extend to the disk. all of which are nsually visible througb the 

 thin but firm walls. Aconthia highly developed, emitted freely from 

 the ciuclidae. Ist mit Adamsia verwandt und lebt, wie diese, auf 

 Schneckenhäusern, die von ßernhardskrebsen bewohnt sind. In den 

 wärmeren Meeren, dem Anschein nach weit verbreitet. Typus A. 

 decorata Drayt. 



Epiactis Verr. Integument firm. Column subcylindrical, capable 

 of involving the summit and contracting into a hemispherical form, 

 with a distinct submarginal fold or »parapet« , separated from 

 the tentacles by a narrow fosse; surface smoothish, in contraction 

 reticulately wrinkled. Near the base it is surrounded by a circular 

 wrinkle or depression, upon which there are borne a variable num- 

 ber of young of various sizes, appearing as if originating from sur- 

 face-buds, but possibly produced from ova attached to this place to 

 the skin. These young may be removed without rupture of the in- 

 tegument, although they adhere quite firmely and leave a depression 

 in the surface of the skin, but there are no apparent lateral ope- 

 nings iu the wall. Tentacles numerous, about 50, in preserved spe- 

 cimens short and thick, arranged in several rows. 



Subord. Zoanth acea. Durch 3 Sp. Mamillifera {M. conferta n.) 

 und 3 Sp. Gemmaria Duch. et M. {G- elongata, G. humilis und G. 

 crassa, sämmtlich neu) vertreten. 



Ebenso Subord. Antipathacea nur durch eine einzige neue 

 Art : Äntipathes Panamensis n. 



Aus der Ordnung der Madreporarier wird zunächst nur das 

 Gen. Montipora Bl. (Fam. Madreporidae, Subord. Madreporacea) mit 

 M. fragosa n. aus Californien aufgezählt. 



An die hier mitgetheilten Untersuchungen schliesseu 



