ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
465 
by Dr. D. C. Danielssen, on the Actinida. All those which were col- 
lected came from deep water, and mostly from the cold area. As the 
author was a member of the expedition, he was able to keep these animals 
alive and sketch them with tentacles expanded and in characteristic 
attitudes. While following the classification proposed by R. Hertwig, 
which is chiefly based on anatomical characters, Dr. Danielssen has also 
made use of external points. 
The forms described are thus arranged : — 
Tribe Hexactinle, Fam. Amphianthidae ; Korenia margaritacea 
g. et sp. n. : Fam. Paractidae ; Kadosactis rosea g. et sp. n., Kyathactis 
hyalina g. et sp. n. : Fam. Sideractidae ; Sideractis glacialis g. et sp. n. : 
Fam. Sagartidae ; Stelidiactis Mopsese g. et sp. n., S. tubularise sp. n., 
Allantactis parasitica g. et sp. n., Anthosactis Jan Mayeni g. et sp. n., 
Sagartia repens sp. n., S. abyssicola K. & D., S. splendens sp. n., Calliactis 
Krfiyeri sp. n. : Fam. Bunodidae ; Bunodes dbyssorum sp. n., Actinauge 
nodosa Fabr. : Fam. Tealidae ; Tealiopsis polaris and Kylindrosactis 
elegans gg. et spp. nn. : Fam. Madonactidee ; Madonactis lofotensis 
g. et sp. n. : Fam. Phelliidae ; Phellia Jlexibilis, Ph. margaritacea , Ph. 
arctica , Ph. crassa , Ph. bathybia , Ph. norvegia , Ph. violacea , Ph. spits- 
bergensis spp. nn., Kodioides pedunculata and Cactosoma abyssorum gg. et 
spp. nn. : Fam. Andvakiidae ; Andvakia mirahilis g. et. sp. n. : Fam. 
Halcampidae ; Halcampoides abyssorum g. et sp. n. 
Tribe Edwardsl®, Fam. Edwardsidae; Edwarsioides vitrea g. et 
sp. n., Edwardsia Andresi sp. n. 
Tribe Zoanthe^: ; Fam. Mardoellidae ; DJardoel Erdmanni g. et sp. n. : 
Fam. Zoanthidae ; Epizoanthns arborescens , E. glacialis , E. roseus spp. nn. 
Tribe Cerianthe^ ; Fam. Cerianthidas ; Cerianthus Vogti sp. n. 
Tribe ^Egire^: ; Fam. ASgiridae; Fenja mirabilis, ASgir frigidus 
gg. et spp. nn. 
This enumeration will give some idea of the wealth of new forms 
collected and described by Dr. Danielssen ; of the last two “ new genera ” 
we gave some account when the preliminary notice regarding them was 
published.* The importance, however, of this possession of a coelom is 
so great that we will transcribe the remarks which the author finally 
makes on this question : — 
“ If we make the coelom the decisive feature, it is then evident that 
my two species must be removed from the ranks of the Coelenterata, but 
where they should then be placed I can really not indicate. It may, 
however, be the case that too much stress has been laid on the so-called 
gastrovascular apparatus as a systematic feature in naming the whole 
of the animal group that Cuvier called Zoophytes, Coelenterata. What 
is called gullet-tube in Actinida is possibly a rudimentary intestinal 
formation, and those at the sides of the adjoining chambers may perhaps 
be considered as a beginning formation of the coelom. This is still 
more distinct in the Ctenophora, where the gullet-tube has not only the 
form of an intestine, but also the function of a real digestive canal, 
even though anus is wanting, and is placed in direct communication 
with the gastrovascular cavity. In any case there is, here, in reality, 
no great step to a complete separation between the intestine and the 
body-cavity. Probably, even in the group of the Actinida, it may be 
* This Journal, 1889, p. 230. 
