ACTINIARIA 



149 



Diagnosis: Body generally cylindrical or columnar, its height often double its diameter. Column 

 with well-developed verrucae in the upper part. Tentacles 40 — 48. Sphincter of the palmate or mixed type. 

 2 siphonoglyphes. Mesenteries hexamerously arranged in 4 or 5 cycles, more numerous than the tentacles, 

 the first two cycles perfect. Ivongitudinal muscles of the mesenteries well-developed, forming distinct, diffuse 

 pennons. Parietobasilar and basilar muscles rather well developed. Nematocysts of the tentacles (17) 22 — 

 31 X 1.5 — 2.5 jx, those of the actinopharynx 24 — 38 X 3 — 4.5 fi. In the latter also nematocysts with distinct 

 basal part to the spiral thread 24 — 31 X 3.5 — 5 fi in size. Nematocysts of the column 17 — 19 x 1.5 fi. Spiro- 

 cysts of the tentacles from 13 x i /i to 31X 2/1. 



Colour olive-green or brown, sometimes flesh-coloured. Tentacles translucent greyish or brownish 

 with an opaque white spot at the base and a faint whitish chevron mark about half-way between the tips 

 and the base. The disc brownish, in young individuals opaque white bands radiating towards the bases of 

 the primary tentacles. Actinopharynx white, inside of the mouth light orange (Verrill, Mc. Murrich). 

 Colour green (Dons). 



Dimensions unto 5 cm in length in extended state (Verrill). 



Occurrence: North America: New Foundland's bank 46°5' N. 5i°44' W. 56fms. , sand, shells 



(Ingegerd-Gladan-Exp. 1871 J. I,indahl). 

 North Greenland: 25 fms. (Torell). 



West Greenland: Upemivik 34 fms. (Ingegerd & Gladan-Exp. 1871), Disco fiord 

 (The Danish Arctic station 1898), Disco bay 3 — 25 fms. (Holm 

 1886), Godhavn (Ammondsen 1872), Claushavn (Oberg 1870), 

 Godthaab littoral (Ryder 1883), Frederikshaab (Lundbeck 

 1889), Nordre Stromfiord littoral (Nordmann 1911), Holstens- 

 borg (Traustedt 1892), Store Hellefiskebanke 18 fms. (Holm 

 1886). 

 East Greenland: 72°2o' N. 2i°2o' W. 70 m. (Sw. Greenland-Exp. 1899), Tunok 

 Angmagsalik 65°53' N. (Kruuse 1902), Tasiusak 25 — 30 fms. 

 (East Greenland-Exp. 1899). 

 Iceland: Berufiord 3 fms. Uttoral, Skerja fiord, littoral (A.C. Johansen 1900), Styk- 

 kisholm httoral (A. C. Johansen. 1900), Djupivogur littoral (A. C. J oh. 

 1900). Iceland without distinct locality. 

 West Spitzbergen: Smeerenberg bay 4 — 10 fms. (1868), Treurenberg bay 6 — 30 fms. 

 (1881), Icefiord, Klas Billen bay 32 — 40 m (Sw. Spitzbergeu-Exp. 

 1908), Axel Isle, Bel sound (1910). 

 East Spitzbergen: I,omme bay 10 fms. (Sw. Spitzbergen-Exp. 1861), Great fiord. 

 Cap Blanck 65 m. (Romer & Schaudinn 1898 St. 5), Whales 

 point 20 — 30 fms., clay (Malmgren 1864). 

 Norway. Finmark: Vadso littoral (Sandeberg 1877), Porsanger fiord, Uttoral 

 (Michael Sars-Exp. 1900), Nordkap (Verkriisen 1875), Kjosen 



