Ico BULLETIN OF THE BUREAU OF FISHERIES. 
. Tubularia crocea (chart 19). Calycella syringa. 
Clytia cylindrica. . *Halecium halecinum (chart 21). 
Campanularia verticillata. Sertularia pumila. 
Obelia commisuralis. *Thuiaria argentea (chart 22). 
*Obelia geniculata (chart 20). Thuiaria cupressina. 
Hebella sp. undet. Sertularella gayi. 
Keratosum complexum. Sertularella tricuspidata. 
Lovenella grandis. Hydrallmania falcata. 
Opercularella pumila. *Schizotricha tenella (chart 23). 
ACTINOZOA. 
*Alcyonium carneum (chart 24). Tealia crassicornis. 
?Pterogorgia gracilis (one small dead fragment). *Astrangia dane (chart 26). 
*Metridium dianthus (chart 25). 
If we consider, with respect to their known ranges upon our coast, these 13 species 
of coelenterates which were of most frequent occurrence in our dredge hauls, we may 
group them as follows: 
Predominantly northern. 
Hydractinia echinata.........Greenland (Mérch) to Charleston, S. C. (McCready). 
Eudendrium dispar............ Bay of Fundy to Vineyard Sound (Verrill). 
Halecium halecinum.......... Gulf of St. Lawrence (Whiteaves) to Long Island Sound (Hargitt). 
MhWiariararcentea's. ins.) ote = North Polar regions to Maryland (Nutting). 
Alcyonium carneum........... Gulf of St. Lawrence (Whiteaves) to Rhode Island (Verrill). 
Metridium dianthus............Labrador to New Jersey (Verrill). 
Predominantly southern. 
Rennaria tiarella rs: 22554\. so1..2.+ si Maine to West Indies (Mayer). 
Schizotricha tenella........... Marthas Vineyard (Nutting) to Beaufort, N. C. (Fraser). 
Ris beeraa at Gl ATIZe 01. rg ve, 2.3) xo os» 's Cape Cod to Florida (Verrill). 
Having range of approximately equal extent north and south. 
Eudendrium ramosum.......... Labrador (Verrill) to Bermuda and Beaufort, N. C. (Hargitt). 
Obelia geniculata............. On our coast recorded from Labrador (Verrill) to Beaufort, N. C. 
(Fraser). [Cosmopolitan, according to Mayer.] 
Range of doubtful extent. 
Tubularia couthouyi........... Probably predominantly northern. 
BAS PLAT iaCLOCE A ye: cet +c os) sisjr Casco Bay (Hargitt) to Brooklyn, N. Y. (Verrill), and perhaps to 
Charleston, S. C. 
Thus six of these species appear to be predominantly northern in their range, while 
only three are known to have a range which is predominantly southern. This is a 
condition different from that shown by the local representatives of most of the phyla 
of animals, which as a rule show a decidedly southern bias. We do not believe, 
however, that this difference has any special significance, particularly since the propor- 
tion of our ccelenterates which are common to Canadian waters is no greater than that 
for the fauna at large. 
With the exception of the two cases discussed above (Alcyonium and Astrangia), 
none of these species appears to be distributed in relation to temperature in local waters. 
In the foregoing calculation we are of course only considering a few of the com- 
monest bottom-dwelling species. Were we to include the multitude of pelagic forms 
(Medusze), many of which are stragglers borne hither by the Gulf Stream, it is probable 
that the ratio of northern to southern forms would be quite different. 
