60 



Hydractinia sodalis. Stimpson-Rathbun 1907 p. 218—220 tab. 24 fig. 3. 



— — . Stechow 1909 p. 21 tab. 1 fig. 1—8, tab. 4 fig. 1-6. 



— — . Goto 1910 p. 470—489 Textfig. 1—18. 



Die auch von mir noch nicht gefundenen Gonophoren sind inzwischen von Goto (1910) 

 entdeckt und untersucht worden. Es sind Sporosacs, die direkt an der Hydrorhiza ent- 

 springen. Man könnte also diese Art zur Gattung Oorhiza stellen; doch empfiehlt es sich, 

 wie oben angedeutet, diese Gattung zu streichen. 



Diese Art ist von dem Paläontologen Dollfus (1906) als neue Art aufgestellt worden; 

 er bildete sie aber nur ab, ohne sie zu beschreiben. 



Alle diese Autoren haben diese Form immer nur in Japan gefunden, so daß sie in 

 ihrer Verbreitung auf dies Land beschränkt zu sein scheint. 



Auf eine Wiedergabe der Beschreibung Inabas kann ich verzichten, da dieselbe schon 

 durch Goto (1. c. p. 470—471) lückenlos wiedergegeben worden ist. 



Bougainyillia ramosa (van Beneden 1844). 



Nr. 1700. 1701b Sammlung Doflein. 



Nr. 31. Bougainvillia sp. ? Inaba 1890 fig. 87—88. 

 Bougainvillia ramosa. Stecbow 1909 p. 26. 



,Nr. 31. Bougainvillia sp.? (Inaba Fig. 87, 88.) 



Trophosome. Stem 30 mm high, consisting of many tubes united together, branching 

 irregularly, the tubes twisted around one another and with irregulär curvatures. Hydranth 

 spindle-shaped, with a ring of about 20 filiform tentacles around the conical hypostome. 



Gonosome. Free medusoids, budding out directly below the hydranth, with short 

 stalks, umbrella deep, with 4 radial canals, each ending with a swelling, from which are 

 produced 2 marginal tentacles, making 8 in all, with an eye-spot at the base of each 

 tentacle. 



Colour. Unknown. 



Locality. Growing luxuriantly on barnacles detached from the bottom of a man-of- 

 war in Yokosuka, Bay of Tokio. 



Date. Gonophores found in February, 1889. 



This species was found among the animals sent to the University as doing damage 

 to the paint, by a certain person (Mr. Hatta?) engaged in the business of painting the 

 bottom of warships. But a more careful examination shows that it does not attach itself 

 directly to the ship-bottom but on the barnacles; hence its damage is probably very small. 

 If one be however forced to seek out tße damage, it possibly consists in protecting the 

 barnacles that injure the paint. The specimens, having been put directly into alcohol, 

 are much contracted. The tentacles around the mouth are probably long. The medusae 

 are produced from the lower part of the stem, and the lower ones are more ripe; the 

 living ones are presumably of a beautiful red colour." (Inaba 1890.) 



