jPQ ACTINIARIA 



Peachia hastata Gosse. 



PI. I, figs. 21 29. PI. 2, fig. 13. 



Peachia hastata n. sp., Gosse 1855, p. 267, PI. 28. 



— — Gosse, Haddon and Dixon 1885, p. 399 — 405, PI. 16 (in this work synonymy and litera- 



ture to 1885). Haddon 1889, p. 338 — 340, i textfig. Faurot 1895, p. 94 — no, figs. 7, 

 8, 10—15, PI. I, figs. 1—3, PI. 2. figs. 3, 5, PI. 3, figs. 3—6, PI. 5, fig. 6, PI. 6, fig. 5, PI. 7, 

 PI. 9, PI. 12, textfig. 12. Carlgren 1904, p. 538, textfigs. 2, 4, 1906, p. 81, fig. 6, a — li (Lite- 

 rature of the larvae). Nafilyan igi2, p. 9. Mc. Murricli 1913, p. 967. 

 Diagnosis: Nematocysts in the ectoderm of the column 12 — 16 x 2 u, in the tentacles 17 — 22 x 

 2 — 2,5//, in the actinopharynx 19 — 24 x 2 11. Spirocysts in the ectoderm of the tentacles 12 — 19//. Lrongi- 

 tudinal muscles of the tentacles well developed. Conchula large with 6 to 10 lobes. Pennons of the mesen- 

 teries of the first cycle strong, spread over the greater part of the breadth of the mesenteries. Folds high, 

 in the outer part arranged more or less like palisades, in the inner part often ramificated. Parietal muscles 

 weak with only a few folds. Pennons of the mesenteries of the second cycle comparatively strong with high 

 folds. Oral stomata present. Marginal stomata? 



Colour: The most distal part of the column, "capitulum" and the "physa" in adult specimens trans- 

 lucent, flesh-coloured or almost salmon-coloured, usually richly splashed with reddish-brown in irregular, 

 longitudinal lines. Tentacles translucent, pinkish or v^ery pale purplish-brown, on the inside with 4 — 5 more 

 or less distinct W marks and bands. The back of each tentacle has an opaque white spot about halfway be- 

 tween the base and the tip. Oral disc pinkish-white, inter-radial lines with brown and white spots and marks. 

 Conchula flesh-coloured or pale pink, lobes with a brown or deep-red core, usually with a white apical spot. 

 Actinopharynx with twelve dark-brown bands, alternating with broader orange-buff bands, further down 

 the colour is reddish or purj^le (Haddon & Dixon 1885, p. 401 — 402; in this work a more complete descrip- 

 tion of the colour). 



Dimensions: Length of the body 2,5 to 10 cm in contracted state, in expanded state unto 20,5 

 cm. Breadth i — 2 cm (Haddon & Dixon). The length of the tentacles about equal to the diameter of the 

 column. 



Occurrence: Denmark. Frederikshavn (Schmidt 1S72) 2 large specimens. 



Sweden. GuUmar fiord (The el and Carlgren 1905. Larvae on hydroid-medusae, 

 and a small specimen on the clay in "Bondhalet"), Vinga 50 — o m. GuU- 

 mar fiord 75 m. Koster fiord 230 — m (Bjorck 1910, Larvae on hydroid- 

 medusae). , 

 Further distribution: North-Sea. Heligoland to British Isles. NW. France. Roscoff, Douar- 



nenez bay, Lannion, Banyuls-sur-Mer. 



Exterior aspect: The body is elongated and the column without distinct division in regions. In 



the expanded state of the animal, physa, capitulum and scapus — according to Haddon and Dixon — 



are to be distinguished. Any distinct limit, especially between the capitulum and the scapus, hardly existing, 



it seems to me rather arbitrary to make this distinction. The "physa" is ampullaceous in expanded state 



