ACTINIARIA 239 



jfc * (k) k k k (k) k k k (k) k k k 



535456 II 7656453 6 54 6 567 176 5 456 3 5456 II 656456 3 6564 







(k) k k k (k) (k) k k k k k k k 



6 5 6 II 6 5 4 5 3 6 5 4 6 5 6 7 17 6 5 4 5 3 5 4 5 6 II 6 5 4 5 6 3 6 5 4 5 6 II 6 5 4 5 



0000 0000000 



* k (k) (k) k k k k k k k k k 



365456 165 6 4563654567 II (5 5 4563 6 5 4656 II 5453 6 546567 



000 00 000 u 



(k) k (k) k k (k) k (k) k k k 



I 6 5 6 4 5 6 3 6 5 4 6 5 6 7 II 6 5 4 5 3 5 4 5 6 II 5 4 5 3 5 4 5 6. 



0000000 000000 



As we see, the development of the mesenteries is a httle different in the secondary compartments. 

 In certain compartments a seventh cycle of mesenteries is present. The mesenteries of the third order and at 

 least the strongest mesentery of the pairs of the fourth order were always fertile, the reproductive organs 

 more rarely appear in the mesenteries of the fifth order. 



When the number of perfect pairs of mesenteries exceeds i6, the exceeding mesenteries may be pro- 

 vided with reproductive organs. It also may happen that when certain pairs consist of a perfect and an 

 imperfect mesentery, the former then is sterile, the latter fertile. I have never observed more than iS^/., 

 perfect pairs of mesenteries in this species (Carlgren 1902 p. 49). Verrill's statement that 24 pairs or 

 more sometimes are perfect, I cannot confirm (compare p. 234). 



Stomphia polaris (Dan.) Carlgr. 



PI. 2. Fig. 5. 

 Tealiopsis polaris n. sp. Danielssen 1890 p. 45 PI. i figs. 7, 8 PI. 8 figs. 2 — 3. 

 Stomphia polaris (Dan). Carlgren 1902 p. 49. 



Diagnosis: Pedal disc wide. Column and margin as in St. coccinea. Sphincter reticular, wide. 

 Tentacles more than 80, unto 115. Actinopharynx with about 28 longitudinal ridges, siphonoglyphes with 

 aboral prolongations. Mesenteries more numerous than the tentacles, 16 pairs perfect, of which 4 pairs weaker 

 and often consisting of one perfect and one imperfect mesentery. Imperfect pairs of mesenteries in the region 

 of the actinopharynx in 2 cycles, at the basal disc in 3. Muscles of the mesenteries aljout as in St. coccinea. 

 Nematocysts in the ectoderm of the tentacles (19) 24 — 31 X 2 — 2,5 [i, in the actinopharynx 22 — 30 x 2 — 2,5/*. 

 Spirocysts of the tentacles from 19 X 1,5 [x to 53 X 3,5 — 4,5 //. Large specific stinging capsules in the tentacles 

 not present (or very seldom?). 



Colour. Encrusted portion of the column whitish-gray, naked portion and also tentacles sometimes 

 pale dirty whitish-yellow with a darker oral disc, sometimes brick-red. The red-coloured tentacles with a 

 darker annulus in the middle, while the extremities are lighter, the whitish-yellow tentacles with a white 

 crescent in the middle of their adoral surface (Danielssen); reddish-yeUow (Romer & Schaudinn). 



Dimensions of the reproduced specimen: Heigth of the column 2 cm. Diameter of the pedal disc 

 2,5 cm, that of the column at the base of the tentacles 3 cm. 



Occurrence: East Spitzbergen. Great Isl. 8o°i5' N. 30°o' E. 95 m (Romer & Schaudinn-Exp. 



St. 37). 

 Hinlopen Strait. 79°2o' N. 20°55' E. 80 m (Romer & Schaudinn-Exp. St. 15). 



