146 



Fig. 119. 



Sertularia turbinata (Lmx.). 



Hydrocladium von derSeite. 



(I. Fig. 58.) 



Gonosome. Unknown [s. Bale 1913, Jäderholm 1904a]. 



Colour. Transparent. 



Locality. Shishigahana, Sagami Sea, 6 m, on Aglaophenia sp. 



This species was collected towards the end of July; there 

 are no reproductive bodies. The upper end of the stem is pro- 

 duced and curved spirally in some speciniens, and is destitute of 

 hydrothecae: it is also sometimes divided and looks like tendrils 

 of plauts. 



This and Xr. 20 [S. gracilis H.] may appear alike from 

 the descriptions, but the actual specimens are very diiferent. The 

 niost striking characteristic of this species is the presence of a 

 fold on the inner side of the hydrotheca, which appears as a 

 straight line when viewed from the mouth of the hydrotheca. 

 An other characteristic is the form of the Joint, which becomes 

 gradually thicker upwards from the slender base and is continued 

 directly into the two hydrothecae without any constriction between, 

 the portion of the Joint that lies above the hydrothecae being 

 very slender. In Nr. 20 [S. gracilis H.] the two ends of each 

 Joint are of equal thickness." (Inaba 1890.) 



Sertularia gracilis Hassall 1848. 

 (Fig. 121—124.) 



Sertularia gracilis. Hincks 1868 p. 262 tab. 53 fig. 2. 

 Nr. 20 Sertularia sp. Inaba 1890 fig. 55, 56. 

 ? Sertularia distans. Kirkpatrick 1890 b p. 12. 



Sertularia gracilis pro parte (ohne die Varietät). Marktanner 1890 p. 240 

 tab. 5 fig. 3. 



— — . Pictet 1893 p. 48 tab. 2 fig. 41 (Synonyme pro parte!). 



— - . Billard 1905a p. 334. 

 [cf. Sertularia tenuis. Bale 1913 p. 129.] 



Diese Art mit regelmäßig gegliedertem Stamm und einander 

 stark genäherten Thekenpaaren scheint doch, entgegen der An- 

 nahme von Billard (1907 a p. 187), von S. distans (Lmx.) verschieden 

 zu sein (s. hier die folgende Species). Noch andere Arten (S. tenuis 

 Bale, S. distans AUman (nee Lntx.) = S. Pourtalesi Nutt., S. Stookeyi Nutt.) hat Billard eben- 

 falls hiermit zusammengeworfen, wogegen Bale (1913) Einspruch erhebt. 



Bisher gefunden in England (Hincks 1868), Kanal (Marktanner 1890), Amboina 

 (Pictet 1893), Gambier-Ins. bei Tahiti (Billard 1905a), y Tizard Bank, Südchinesisches 

 Meer (Kirkpatrick 1890 b). 

 Für Japan neu. 



,Nr. 20. Sertularia sp. (Inaba 1890 Fig. 55, 56.) 

 Trophosome. Stem 20 mm high, very slender and without branches, growing out 

 crowded from a creeping hydrorhiza, each Joint with one pair of hydrothecae. which are 



Fig. 120. 



S. turbinata (Lmx.). 



Hydrocladium von oben. 



(I. Fig. 59.) 



