perforata of Gegenbaur for specimens taken near the Canary-islands and finds these identical 

 with Abyla basseiisis Huxl. 



Haeckel is of opinion that Abyla bassensis differs from Abyla perforata Ggbr. He 

 describes a new species Bassia obeliscits and speaks of a cjuite new Abylid to which he gives 

 the name of Bassia tetragona. In 1897 Chun uses Bassia in parenthesis and writes now about 

 Abyla (Bassia) perforata Ggbr. He finds his specimens identical with the Atlantic Abyla 

 perforata Ggbr. 60, Bassia perforata Ch. 88, and Bassia obeliscus Haeck. 88b. 



He hopes that further investigators will find out whether the Abylids described by OuoY 

 and Gaimard 27, Blainville 30, Lesson 43, Huxley 59, are identical with the specimens of 

 the atlantic ocean. 



The material of the Siboga expedition is altogether insufficient to make any conclusion 

 concerning either cjuestion. The preservation was ver\- middling. 



We think it sufficient to give a sketch of a complete Abyla bassensis, using this name 

 for the tropical Abyla, in opposition with Abyla perforata which has hitherto been used for 

 atlantic specimens. Concerning Sphenoides australis, we found not the least difference with 

 Huxley's excellent description and figures. Huxley did not notice the development of the 

 appendages of Abvla bassensis into Sphenoides australis. Nor have we found any early stages. 



It is therefore more correct to maintain the name Sphenoides australis, as it was given 

 by Huxley 59. 



16. Abyla trigona O. et G. PI. IV, figg. 34, 35, 36. 



= Abyla trigona Q. et G. 27. 

 = Abyla trigona Eschsch. 29. 

 = Abyla trigona Ggbr. 60. 

 = Abyla trigona Ch. 88, 97 «. 

 == Abyla carina Hkl. 88/;. 



Stat. 118. Lat. i°38'N., Long. I24°28.2E. Cat. 93 B.B. ale. 90°/o- O'le superior nectophore. 

 Stat. 203. Lat. 3°32'.5 S., Long. 124° 15.5 E. Cat. 126 U. ale. 9o7o- One superior, one inferior 



nectophore; the latter badly preserved. 

 Stat. 213. Saleyer-anchorage and surroundings including rulu-Pasi-Tanette near the North-point 



of Saleyer-island. Cat. 78 D. ale. 9o7o- One inferior nectophore of r Abyla trigona. 

 Stat. 220. Anchorage off Pasir Pandjang, West-coast of Binongka. Cat. JJ B. formald. 4°!^. 



2 superior nectophores. 

 Stat. 223. Lat. 5°44'.7S., Long. I26°27'.3E. Cat. 31 D. ale. 9o7o- O"^ superior nectophore. 

 Stat. 224. Lat. 5°34'S., Long. 127° 4' E. Cat. 204. formald. 47o- One superior nectophore. 

 Stat. 276. Lat. 6°47'.5 S., Long. i28°4o'.5 E. Cat. 138 D. ale. 9o7o- One superior nectophore. 



Amphiroa Les. 



17. Amphiroa alata Les. PI. IV, figg. 37a, 2,-jb, 38. 



= Amphiroa alata Les. 07. 

 = Anipliiroa alata Hu.kI. 59. 

 = Eudoxia trigonae Ggbr. 60. 

 = Amphiroa alata Ch. 88. 

 = Amphiroa carina Hkl. 88 <^. 

 =.: Amphiroa alata Ch. 97^?. 



