Hydroids (Cnidaria, Hydrozoa) of the Danish expedition to

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210 segments similar to median inferior but with longer lower chamber. Gonothecae absent in present material, see Schuchert (1997) for a description and figures. Remarks The type material of Halopteris plagiocampa (Pictet, 1893) was recently located (see Schuchert 1997) and was re-examined for this study. The new material from the Kei Islands Expedition was indistinguishable from the type material. My previous description of the stem segmentation (Schuchert 1997) is not entirely correct. Nearly the whole stem is segmented by transverse nodes only, except for the most distal part where an oblique node below the hydrotheca can delimit an intersegment. In the homomerously segmented part of the stem, the intersegments are thus fused to the lower end of the main segments. Contrary to the previously examined material, the lateral nematothecae in the present material and the type specimen had deep emarginations on the adcauline side. Such a variation, however, is quite usual in this family. Distribution Indonesia, Japan, northern Australia. Type locality: Bay of Ambon, Moluccas, Indonesia, zone of corals (Pictet 1893). Family Plumulariidae Plumularia badia Kirchenpauer, 1876 Fig. 59. Plumularia badia Kirchenpauer, 1876: 34, 45, pl. 1: figs 3– 4, pl. 4: fig. 3. – Bale 1884: 128, pl. 18: figs 1–2. – Stechow & Müller 1923: 473. – Vervoort 1941: 221. – Watson 2000: 51, fig. 39A–E. Plumularia ramsayi Bale, 1884: 131, pl. 11: figs 3–4. – Billard 1913: 52. – Vervoort 1941: 221. Plumularia gracilis von Lendenfeld, 1885: 476, pl. 14: fig. 17, pl. 17: figs 28–29. Material examined: Kei Islands Expedition stations: 71, several stems, without gonothecae. – 104, with gonothecae. – Kei Islands Expedition, Samalon Island near Ujungpandang, Sulawesi, 35 m, 28 Jun 1922, with gonothecae, on shell fragment. P. SCHUCHERT Fig. 59. Plumularia badia Kirchenpauer, 1876; A–B station 71; D station 104. A. Part of colony. B. Branch with apophysis and part of hydrocladium. C. Internode of hydrocladium. D. Gonotheca, perhaps not fully grown yet, same scale as B. – Scales: A = 1 cm; B = 0.1 mm; C = 50 µm. Description Colonies up to 8 cm high, multi-pinnate, stems monosiphonic, stiff, branches opposite or alternate, in one plane. Stem and branches bear alternate hydrocladia. Stem and branches without nodes, without hydrothecae, with long apophyses for hydrocladia (0.18 mm). Three nematothecae associated with each apophysis: two on apophysis, one close to base. Hydrocladia relatively short and very thin, all in plane of branches and stem, length quite uniform, with up to 10 hydrothecae, homomerously
HYDROIDS OF THE DANISH EXPEDITION TO THE KEI ISLANDS segmented by oblique nodes, segments about 0.3 mm long, all segments with a hydrotheca and three nematothecae: one below and two lateral to hydrotheca. Internode with internal ribs, variably developed: one at each end, one below median nematotheca, one at base of hydrotheca. Hydrotheca cup-shaped, depth 64–80 µm, placed centrally on internode, adcauline side adnate, abcauline wall at an angle of about 30° to internode axis, straight or with slight curvature, hydrothecal margin sinuate, distinctly lowered towards internode. All nematothecae two-chambered and movable, conical, walls straight, rim not incurved, adcauline wall of upper chamber emarginated. Median inferior nematotheca not reaching to hydrotheca, on prominence of internode. Lateral nematothecae almost as big as depth of hydrotheca. Gonothecae inserted without pedicel in upper axil of apophyses, small (0.2 mm), conical, distally truncated, terminal orifice oval, perisarc thin. Colour: Stem and branches deep brown, hydrocladia white. Distribution Indonesia, tropical and subtropical coast of Australia (Watson 2000). Type localities: Brisbane and Singapore. Plumularia habereri Stechow, 1909 Fig. 60 Plumularia habereri Stechow, 1909: 77, pl. 6: fig. 4. – Stechow 1913: 91, figs 59–60. – van Gemerden-Hoogeeven 1965: 60, figs 34–36. – Ryland & Gibbons 1991: 532: fig. 5. Plumularia habereri var. attenuata Billard, 1913: 42, fig. 34. Plumularia habereri var. elongta Billard, 1913: 44, figs 35– 37. Plumularia habereri var. subarmata Billard, 1913: 45, fig. 38. Plumularia habereri var. mediolineata Billard, 1913: 45, fig. 39, pl. 3: fig. 31. Plumularia habereri var. mucronata Billard, 1913: 46, fig. 40, pl. 2: fig. 24. Dentitheca habereri. – Hirohito 1995: 259, fig. 87a–c. Material examined: Kei Islands Expedition, Waling, Banda Islands, 10 m, 15 Jun 1922, fragmented plume with gonothecae. – Kei Islands 211 Fig. 60. Plumularia habereri Stechow, 1909; A–D, Banda Islands; E, Samalon Island. A. Colony silhouette (damaged). B. Part of branch with apophysis. C. Branch with gonotheca, same scale as B. D. Two hydrothecae from same hydrocladium; note variability. E. Hydrocladial internode of juvenile colony, same scale as D. – Scales: A = 2 cm; B, C = 0.2 mm; D, E = 0.1 mm. Expedition, Samalon Island near Ujungpandang, Sulawesi, 35 m, 28 Jun 1922, juvenile colony, together with P. badia. Description Colonies 5–25 cm high, multi-pinnate, up to
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Family Solanderiidae HYDROIDS OF TH
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Hydroids (Cnidaria, Hydrozoa) of the Danish expedition to

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