ACTINIARIA 



83 



Halcampa clavus Quoy a. Gaimard. R. Hertwig 1882, p. 82, PI. 3, figs, i, 4, 10, PI. 12, fig.s. 8, 9, 11. PI. 13, 

 fig.s. 2, 4, 7. Tizard and Murray 1881, p. 674. Haddon i88g, p. 336. Pax 1910, p. 304, 

 1914, p. 585—586. 

 Halcainpoidcs clavus (Quoy a. Gaimard? Hertwig) Appellof 1896, p. 13, PI. i, 2. 

 Hakamponiorphe clavus (R. Hertwig) Carlgren 1893, p. 38 (1900, p. 1170). 

 Halcampoides elongaius n. sp. Carlgren in Stephens. 1912, p. 58 (8). 

 Halcampa septenlrionalis n. sp. Pax 1912, p. 312, 1914, p. 586. 

 Halcampa kerguelensis n. sp. R. Hertwig 1888, p. 28, PI. 2, fig. 5. Appellof 1896, p. 14. 



Diagnosis: Nematocysts in the ectoderm of the column partly larger, ig — 36 x 3 — 4 /i, partly 

 smaller, (10) 12 — 24 x 1,5 /j; in that of the tentacles 22 — 38 x 2 — 3 fi; in that of the actinopharynx partly 

 smaller, 12 — 14 X 1,5 /j, partly larger 27 — 46 X 3—4 (5) /i. Nematocysts with discernible basal part to 

 the spiral thread 20 — 24 X 4 — 6 /j. (concerning the nematocysts of forma mediterranea compare below). 

 Spirocysts in the ectoderm of the tentacles of variable size from 14 X i,5/ito40 X 4 — 5 11, some capsules 

 sometimes larger. Column with 12 longitudinal furrows corresponding to the insertions of the mesenteries. 

 Longitudinal muscle-pennons in the upper part of the reproductive region with very numerous, high, often 

 (especially in large specimens) rather richly ramificated folds. Outer lamellar part of the mesenteries attached 

 close to the outer edge of the pennons. Parietal muscles strong, well limited, with in the outer parts low, 

 ill the inner ones high folds which in large specimens are from somewhat to very richly ramificated. Mar- 

 ginal stomata present. 



Colour: Purple-coloured, tentacles brownish {purpurea teste Studer). — Column pale rose-red. 

 Oral disc and tentacles intense crimson, the disc a little paler than the tentacles {Aegir teste Danielssen). 

 — Column flesh-coloured with lighter longitudinal stripes, anterior part pellucid, oral disc pellucid with rose- 

 coloured rays shading off into violet. Tentacles light red, at their base with a brownish- violet patch extending 

 stripe-like along the adoral side right up to the point [Fenja teste Danielssen).— Column rose-red, poste- 

 rior extremity with a faint violet play of colour, oral disc rose-red. Tentacles dark red, shimmering faintly 

 crimson {Halcampoides teste Danielssen). — Column yellowish-white with a play of rose-colour, distal 

 part greyish to whitish-yellow. Tentacles brown, more or less shading off into green. — Column yellowish- 

 white with a play of reddish-violet, here and there with darker stripes. Distal part and the tentacles as the 

 preceding specimens (two specimens from Greenland teste Arwidsson). — Proximal part of the column 

 reddish-yellow, distal part bluish-violet. Tentacles flesh-coloured (a preserv'ed specimen from the Ingolf- 

 Expedit.) — Column flesh-coloured shading off a httle into brown (a spec, from Bohuslan). — Column 

 ochreous-coloured, the distal part more pale (a preserved specimen from Ireland, clongatus). 



Dimensions: in expanded state to 4,5 cm (teste Studer). — Length of the body 7 cm, largest 

 breadth 2,4 cm (a very large preserved spec, from the German Tiefsee-Expedition) . — Length of the body 

 1,5—2 cm, breadth 0,5—1 cm {clavus in prescribed state teste Hertwig). — Length of the body 1,5—2,5 

 cm, largest breadth 0,7—1 cm {kerguelensis in preserved state, teste Hertwig). — Length of the body 10 

 cm., largest breadth 1,5 cm. Length of the tentacles i cm (a preserved spec, from Naples). — Length of the 

 body 7 cm, breadth 1,5 resp. 1,2 cm {Fenja and Halcampoides in expanded state, teste Danielssen). — 



