94 



Billards verschiedene Varietäten gehören alle ein und derselben Art an, nicht 

 2 Arten, N. antennina und N. Penieii, wie man nach seiner Naniengebung annehmen 

 könnte. Sämtliche neueren Autoren (Quelch, Jäderholm. Billard, Stechow) sind sich nun 

 darin einig, daü diese Form von N. antennina als besondere Art abgetrennt werden 

 muß und nicht bloß eine Varietät von ihr ist, wie ihr erster Beobachter Kirchenpauer an- 

 nahm. Diese Art muß daher den Namen N. irregidaris führen. Ihre Varietäten dürfen 

 nicht, wie Billard es tut, als Varietäten von N. antennina bezeichnet werden, sondern 

 müssen Nemertesia irreyularis (Quelch) var. antennoides, bezw. var. longa heißen. 



Halicoruaria liians (Busk 1852). 

 (Fig. 61.) 



Nr. 1548 Sammlung Doflein. 



Nr. 26. Halicornaria sp. Inaba 1890 fig. 71— 73. 



Halicornaria hians. Stechow 1909 tab. 1 fig. 11; tab. 6 fig. 16 — 17. 



,Nr. 26. Halicornaria sp. (luaba 1890 

 Fig. 71, 72, 73.) 



Trophosome. Stem 100 mm high, smaller branches 

 alternate, two to each Joint, all in one plane. Hydrothecae 

 somewhat flask-shaped, with expanded mouth, making an 

 angle of 50" with the stem, with a thick transverse septum, 

 growing out obliquely upwards from about the middle 

 of the front - wall , dividing the inferior of the hydro- 

 theca into two portions. The mouth of the hydrotheca 

 is straight in front, and there are 2 large teeth on the 

 sides, the back part is again straight and free from the 

 stem. There are no constrictions on the smaller branches 

 corresponding to the joints. 



The front-nematophore is long, united to the wall of 

 the hydrotheca and projecting beyond the mouth; this portion, 

 being long and grooved and gradually becoming narrowei", 

 terminates in a sharp point. The lateral nematophores are 

 smaller, vesicular and united to the wall of the hydrotheca. 

 the terminal mouth and the lateral opening being fused 

 with each other and appearing like a slit. On the stem 

 the nematophores are like the lateral ones of the hydro- 

 theca; there are 1 behind the base of each branchlet and 

 2 in front. 



This interesting species was collected at Misaki, Sagami Sea, in January; un- 

 fortunately there are no reproductive organs. The characteristics of the genus Halicornaria 

 are largely similar to those of Aglaophenia, the only conspicuous difference being that, 

 while the reproductive organs of the latter are enclosed in a corbula, those of the former 

 are naked and are borne on ordiuary (non-metamorphosed) stems or branches. As my 



Fig. 61. Halicornaria hians (B.J 



Hydrotheken von oben mit den 



Zähnen des intrathekalen Septums. 



(I. Fig. 73.) 



