ACTINIARIA 



234 



coccinea, have 24 pairs or more perfect and that all the perfect mesenteries are fertile. Neither Mc. Murrich 

 (1911 p. 79) nor I m3'self have found this to be the case. Verrill either hinges his statement on erroneous 

 observ^ations, or — which is more probable — Verrill has confounded another Paractid with Stomphia 

 (compare further 5^. coccinea^). For this reason I have not encluded Verrill's statement in the diagnosis. 



Stomphia coccinea (O. F. Miill.) Carlgr. 



PI. 2. Figs. I. 8. 

 Actinia coccinea n. sp. O. F. Mtiller 1776 p. 231, 1778 2. d. 30 figs, i — 3. 



— • — Miill. Gmelin 1788 — 93 p. 3133. Bruguiere 1789 n. 5 PI. 72 figs, i, 2. Blainville 1830 



p. 290, 1834 p. 324. lyamarck 1837 3. p. 540. 0rsted 1844 p. 72, 74. Johnston 1847 

 p. 215. Sars 1851 p. 144. Danielssen 1859 p. 45 (p. p.). Milne-Edwards 1857 — 60 

 p. 243. v. Beneden 1866 p. 189 PI. 19 figs, i — 4. 

 Stomphia coccinea (O. F. Miiller) Carlgren 1893 p. 138, 1902 p. 47, 1913 p. 4. Lonnberg 1898 p. 55. Mc. 



Murrich 1911 jj. 47. 

 Stomphia churchiae n. sp. Gosse 1859 p. 48, i860 p. 222 PI. 8 fig. 5. Norman 1868 p. 440, 1869 p. 318, 

 Schulze 1875 p. 140, Andres 1883 p. 369. Mc. Intosh 1884 p. 53. Pennington 1885 

 p. 173. Carlgren 1893 p. 80 PI. i figs. 11, 12, PI. 8 figs. 4 — 6, PI. 9 figs. 2, 3, PI. 10 fig. 4 

 textfig. 22 — 25. Stephenson 1918 b p. 126. 

 Actinia virginea sp. n. Miiller 1778 PI. 6 fig. 53. 



— carneola sp. n. Stimpson 1852 p. 7. 



Stomphia carneola (Stimps.) (p. p.) Verrill 1899 p. 206. Parker 1900 p. 753. 



Actinia nitida sp. n. Dawson 1858 p. 404 figs. 3 — 5. 



Rhodactinia davisii var. 4 Verrill 1864 p. 19, 20. 



KyUndrosactis elegans sp. n. Danielssen 1890 p. 4, PI. 2 fig. 8, PI. 8 figs. 4, 5, PI. 9 figs. 5 — 7. 



Sagartia repens sp. n. Danielssen 1890 p. 45, PI. i figs. 7, 8, PI. 8 figs. 2, 3. 



Diagnosis: Pedal disc ver>' wide. Column smooth or in contracted state wrinkled. Margin rather 

 distinct. Sphincter strong, long, reticular, sometimes with a tendency to stratification. Tentacles to about 

 80 in number. Actinopharynx well developed with longitudinal furrows, in number almost corresponding 

 with those of the perfect mesenteries. Mesenteries much more numerous than tentacles. 16 to 18 pairs perfect, 

 sometimes a few of these mesenteries consisting of a perfect and of an imperfect mesentery. Imperfect pairs 

 in variable numbers, in larger specimens in 4 C3'cles, sometimes a tendency to development of a fifth cycle in 

 some exocoels. The last cycle often represented by a single mesentery instead of a pair. I/ongitudinal muscles 

 most developed in the outer part of the mesenteries. Parietobasilar muscles strong, reaching to the sphincter. 

 No marginal stomata (always?). Typical nematocysts in the ectoderm of the tentacles 17 — 26x1,5 — 2,5 fi, 

 in the actinopharynx 19 — 27 X 2 — 2,5 fj,, spirocysts of the tentacles from 19 X 1,5 /* to 60 X 4,5 — 5 fi. 

 Besides large specific nematocysts, 34 — 55 x 5 — 7 ju in size, in the tentacles, nematocysts with discernible 

 basal part to the spiral thread, 22 — 26 x 3,5 — 5 /< in size, in the actinopharynx. 



Colour variable. Column cream-white, pale pink or flesh-coloured, irregularly marked with carmine. 



