ZOANTIIARIA 



23 



E. lindahli or identical therewith. But as it differs somewhat from E. lindahli with regard to the 

 nematocysts, I have for the present set up this species as a variety of E. lindahli , leaving to later 

 investigations, when more material has been obtained, to prove if it may possibly form a separate 

 species. I ma}- also mention that among the specimens sent back to Dr. Nordgaard there may 

 possibly still be found a few specimens of this variety which I have called Nordgaardi. All these 

 specimens certainly need revision. 



Occurrence: 63 37' N., 20 24' E. Lyngen off Kaafjord. 1 sp. 



Dimensions: Length 2'i cm., smallest breadth 0-2 cm., greatest breadth 07 cm. 



Colour in alcohol: In the lower part gray, in the upper light sand-coloured. 



External appearance (fig. 7 PI. 2). The polyp was truncate and somewhat contracted in 

 the lower part, the upper part being expanded. The distal margin was rounded. The capitular 

 furrows were very distinct and their number was 20. Tentacles and oesophagus as in the main form. 

 The mesoglcea of the body-wall was considerably incrusted in the outer part, less in the inner. The 

 incrustation consisted of sand-grains and some sponge needles. But I have not observed any fora- 

 minifera, which however are possibly dissolved, as the animal, so far as I remember, had been pre- 

 served in formaline or formaline spirit. 



The anatomical structure seems to agree with that of E. lindahli with the exception regarding 

 the nematocysts mentioned already. The number of mesenteries was 36, 10 macro- and 8 micro- 

 mesenteries on either side of the polyp. 



The nematocysts are generally larger than in the typical E. lindahli. In the lower part of the 

 ectoderm of the body-wall there is a fairly frequent occurrence of equally broad nematocysts with 

 greatly twisted thread (length 43 — 48 p, breadth 10 — 12 fi). In the capitular region large capsules of 

 the same kind as in the filament occur somewhat frequently (length 38 — 48//, breadth 7 fi). 



The ectoderm of the tentacles contains numerous spirocysts, the thick-walled nematocysts 

 being very scarce (length 17 — 19 (22) fi). Earge nematocyst capsules with greatly twisted thread also 

 occur here sparsely (length 43—48//, breadth 7 fi), and even sometimes smaller nematocysts of the 

 same kind as in the filament. The oral disc has, as regards the nematocysts, almost the same struc- 

 ture as the tentacles. 



The oesophagus is provided with numerous, thick-walled capsules about 24 // long and less 

 than 5 /i broad. Further very few nematocysts with greatly twisted thread occur of the same size and 

 structure as in the filament. 



The glandular tract of the filament contains partly nematocysts with greatly twisted thread, 

 partly larger ones 43 — 60 u long and j /_t broad, sometimes curved, partly smaller ones generally curved 

 26— 34/i long and 5// broad; further thick-walled capsules with distinct basal part of the spiral thread 

 and broader at the one end (length 22 /i, breadth 5//, length 24 — 26^, breadth 6/1 in the broadest end). 



Epizoanthus erdmanni (Dan) Hadd. & Shackl. 



PI. 1, fig. 14, 16, 17, PI. 2, fig. 24, PI. 4, fig. 3, PI. 5, fig. 4. 

 Mardoel erdmanni n. sp. Danielssen Norwegian North Atlantic Exped. Actinida 1890 p. 116, PI. 6, 



fig. 1, PI. 21, 22, figs. 1 — 7. 



