298 Leuckart: Bericht üb. d. Leist. in d. Naturgeschichte 



lum, Phellia inaequaUs, Ph. clavata, Ph. collaris, Ph. arctica. Cereus 

 Stimpsoni, C. sinensis, Sagartia lineata, Cancrisocia expansa (auf 

 Dorippe facchino, wo dieselbe mittelst ihres basalen Chitinblattes 

 durch die Hinterfüsse ebenso festgehalten wird, wie die Muschel- 

 schale, auf der das Thier ursprünglich sich ansiedelte), Bunodes 

 japonica, Physactis (n. gen.) multicolor Stimps. , Anthopleura 

 Stimpsoni, Ämphi actis (n. gen.) orientalis, Discostoma fungiforme, 

 Homactis (n. gen.) rupicola, Stephanactis (n. gen.) indica. 



Zur Charakteristik der neuen Genera folgen hier die Dia- 

 gnosen : 



Paranthea Verr. (= Dyactis Verr. non Edw.) aus der 

 Gruppe der Warzen- und Porenlosen Antheinen. Column subcylin- 

 drical, usually short, smooth. Tentacles not retractile. unequal, the 

 inner ones several times longer, thau the diameter of the body, 

 outer ones much shorter. Disk usually flat, not contractile. 



Physactis Verr. e subfam. Bunodinarum. Base as broad 

 as the disk. Column short, cylindrical, with a fold below the mar- 

 giu, beneath which its sides are covered with prominent and per- 

 sistent scattered Verrucae ; above the fold the texture is softer and 

 smoother , and the surface is crowdedly covered with small, incon- 

 spicuous, soft papillae or Verrucae arranged in vertical lines. Ten- 

 tacles not very numerous, stout, fusiform or conical, pointed, appa- 

 rently not contractile and not capable of Involution. Mouth pro- 

 minent, strongly lobed. Mit Urticina verwandt, aber durch die 

 weiche Beschaffenheit und die Structur des Vorderleibes, so wie die 

 nicht retractilen Fühler davon (auch von Bunodes) verschieden. 



Amphiactis Verr. e subfam. Phyllactin. Base broad. Co- 

 lumn covered with prominent Verrucae, arranged in vertical lines. 

 Simple tentacles, in several rows submarginal, with Compound and 

 much subdivided, short, tentacle-like organs both outside and inside 

 of them; the latter covering the disk more or less completely. 



Homactis Verr. e subfam. Discostom. Column low. cylin- 

 drical, with a distinct fold near the margin, substance firm, surface 

 smoothish. Disk not much wider, than the column, concave, the 

 whole surface, except a narrow region abouth the mouth, covered 

 with small rounded, perforated tubercles, arranged in wide radia- 

 ting series, in which they are crowded in several transverse rows. 

 Tentacles marginal, in life longer, with imperforated tips: in alco- 

 hol scarcely different from the tubercles in appearance. Mouth 

 large. 



St ephanactis Verr. e subfam. Discost. Column subcylin- 

 drical, somewhat elongated, not verrucose, substance firm and dense. 

 Disk exceeding the column, covered with regulär radiating lines of 

 short unequal tubercles. The outer tubercles or tentacles are lar- 



