101 



the last two joints, and with 1 iiematophore on each Joint of the stem besides the 

 branchlets. 



Colour. Perisarc light brown. 



Localit}'. Between Misaki and Jogashinia, Sagami Sea, about 3 m. 



Date. Corbulae found in July. 



This is one of the prettiest species of the Hydroids of Misaki : it is usually called 

 ,Kaya" by the fishermen, although this naine does not appear to be limited to it, the 

 species of Aglaophenia described as Nr. 29 [Thecocarpus niger] being also called by the 

 same name. This species is, however, more frequently ol)tainable owing to its greater 

 luxuriance. Compared to its great size this species has a very thin perisarc; the corbulae 

 are not completely closed, the branchlets being very shoi't and not growing with the 

 gonophores; hence these appear, when ripe, as if borne in small numbers on short stenis 

 without branches. Fig. 81 [hier Fig. 70] represents a young corbula. " (Inaba 1890.) 



Agiaopheiiin Sueiisoiiii .Jäderholm 1896. 



(Fig. 71-74.) 

 Xr. 4763 - 4766, 9386 Sammlung Habeier. 



Xr. 27. Aglaophenia pluma. (Falsch bestimmt!) Inaba 1890 fig. 74— 77; 1892b. 

 Aglaophenia Suensonii. Jäderholm 1896 p. 18 tab. 2 fig. 9. 



— Ijimai. Stechow 1907 p. 197. 



— Suensonii var. Ijimai. Stechow 1909 p. 89 tab. 1 fig. 10; tab. 6 fig. 7—8. 



Material vom 6. Oktober 1904 aus der Sammlung Doflein zeigt sehr viele Corbulae, 

 die sich aber von der von mir (1909 p, 91 Textfig. 6) abgebildeten Corbula durch sehr viel 

 größere Kürze nicht unerheblich unterscheiden. Diese Corbulae haben nur 5 — 7 Rippen 

 und gleichen etwa denen von Aglaophenia pluma, und so finden wir die Art denn auch 

 bei Inaba fälschlich als A. pluma bestimmt. Eine Abbildung bei Inaba gibt ein gutes 

 Bild von diesen kurzen Corbulae (hier Fig. 74). Andererseits gleichen die Trophosome 

 unseres Materials genau den Jäderholm'schen Typen und ebenso den Angaben von Inaba. 



Fundort: Aburatsubo, Sagamibai. 



Untergrund: Auf Algen. Epizoisch darauf Hebelia parasitica (Ciamician). 

 ,Nr. 27. Aglaophenia pluma Lamx. (Inaba 1890 Fig. 74, 75, 76, 77.) 



Trophosome. Stem 40 mm high, with alternate branches, all in oue plane, one from 

 each Joint. Hydrothecae bowl-shaped, upper part broad, with a wide mouth, attached to 

 the stem at an angle of 4.5", with a transverse furrow in the lower part of the bowl. 

 the margin of the mouth cut deeply, with 9 teeth, viz. four on either side and one in 

 front, all turned slightly outwards. On the smaller branches there are two transverse 

 furrow-lines to each Joint, one continuous with a similar line in the lower part of the 

 calyx and the other arising from the base of the lateral nematophores. The front-nemato- 

 phore is tubulär and open on one side, of about the same length as the hydrotheca, fused 

 with the latter by the greater part of its length, the distal part separated from the calyx 

 and projecting. Lateral nematophores also tubulär and open on one side, not projecting 

 conspicuously. The nematophores of the stem are like the lateral nematophores, and 

 there are 3 to each Joint, viz. one pair in the axil of the brauch and a third below them. 



