J2 CERIANTHARIA. 



Cerianfhus vermicularis Forb. Liitken, i860, p- 199. 

 » lutkejti n.n. Andres, 1883, p. 561. 



» damelsse?ii u.n. pro parte Leviusen, 1893, p. 397. 



» danielssem n.-n. Kings ley, 1904, p. 347. 



» boreaUs n. sp. Danielssen, 1879, PI. 4, figs 8—9. 



» » Dan. Danielssen, 1888, p. 13, PI. i. 



? Cerianfhus sp.? Breitfuss, 1904, p. 6. 



Diagnosis: A large to medium .sized .species with tentacles of average development. Tentacles 

 arranged in the main as in C. membranaceus., though a directive tentacle is lacking in the region 

 of the labial tentacles. Siphonoglyph comparatively small, hyposnlcus feebly developed, hemisulci quite 

 long, distinct, but narrow. Directive mesenteries short. Protomesenteries 2 very long, extending 

 right to the aboral pole, fertile with a well developed ciliated tract region, not however reaching much 

 further down than to the aboral end of protomesenteries 3, with very long craspedion region. Cnido- 

 glandular tract region comparatively feeble, wavy. Protomesenteries 3 rather short, with a ciliated 

 tract region, which reaches as far as the termination of the directive mesenteries, and a long, wavy 

 cnido-glandular tract region. Metamesenteries not clearly arranged in quartettes. Little difference 

 between the metamesenteries of the ist and and cycle, all of which go down to the aboral pole. The 

 metamesenteries of the ist and 2nd cycle fertile, with rather shorter ciliated tract region than proto- 

 mesenteries 2, this region being shorter in proportion to the nearness of the naesenteries to the mul- 

 tiplication chamber. The region of the cnido-glandular tract developed as with protomesenteries 2. 

 as also the craspedion region. The metamesenteries of the 3rd and 4th cycle sterile, short, diminishing 

 in length towards the multiplication chamber with a comparatively long ciliated tract region and an 

 equally long cnido-glandular tract region, without craspedion region. 



Occurrence : 

 Greenland. Tessiursars Vak, Anlistoivik fjord 3— lofath., fine grey clay 7/7, 1883, Sophia Exp. No. 522, 

 2 Ex. R. M. 

 » Fjord in the vicinity of the Sophias anchorage 6. 7. 1883, Sophia Exp. No. 521, i Ex. R. M. 



» Discofjord, luannersvit i8fath. sand and clay 27. 6. 1871. Ingegaerd and Gladan-Exp. Lin- 



dahl many ex. R. M. 

 » 505 fath. 22.2.1890 Wan del No. 5, i ex. Cop. M. 



Spitzbergen. Ice Fjord, Ekman Bay 40— 43 m. Very loose, red clay. Bottom temperature —0,3°. Spitz- 

 bergen-Exp. 1908, St. 113, i ex. R. M. 

 » In the coast of Cape Platen 40 m. Heligoland-Exp. 1898, St. 14, i ex. Berlin M. 



? Barents sea. Breitfuss. 

 Kara sea Lat. 70° 57' 67° 37' N. Zembla Exp. 1875, 1 ex. R. M. 



Matochkin Sharr 20 fath. sand and clay 13. 7. 1875 N. Zembla Exp. 1875, 2 ex. R. M. 

 Norway. Trondhjem fjord, Rodberg 50-100 ni. Aug. 1898 Ostergren and Arvidsson i small ex. R.M. 

 Molde 30—50 fath. [Cerianikus horcalis) Bergen Mus., Cop. M., R. M. 

 Bergen, the great Lungegaardsea 20 fath. {Cerianthus borealis Dan.) 

 Hardanger Varaldso 50—60 fath. [Cerianthus borealis Dan.) 



