8d Canadian Arctic Expedition, 1913-18 



Callopora craticula (Alder) 



Bernard harbour, C.A.E. Station 41/, 5 meters, Aug. 1, 1915, one well- 

 developed colony on Fucus; off Cockburn point. Dolphin and Union strait, 

 C.A.E. Station 43a, 100 meters, September 13, 1915, and Station 43c 20 to 30 

 meters, Sept. 14, 1915, several colonies on Laminaria. 



Callopora cymbaeformis (Hincks) 



Lat. 70° 24' N., long. 161° 25' W., C.A.E. Station 23, 9 to 10 fathoms, 

 Aug. 19, 1913, one small colony on a hydroid stem. 



Hudson bay, Neptune expedition, 1904, on hydroid stems; south side of 

 Hudson strait, Diana Expedition, 1897, on stem of BoUenia ovifera. 



Callopora nigrans (Hincks) 



Lat. 70° 24' N., long. 161° 25' W., C.A.E. Station 23, 9 to 10 fathoms, 

 Aug. 19, 1913, one colony on a pebble. 



There is some variation in the position of the avicularia. Usually these 

 are situated at the distal corners of the zooecium, but occasionally they are 

 placed as much as one third of the way back toward the proximal end. The 

 avicularian chambers also sometimes appear to be crowded together so closely 

 as to form one structure, in which case the avicularian mandibles are lacking 

 and a kenozooecium results. I am of the opinion that this is the nature of 

 the structure which Nordgaard (1906, p. 13, PI, l,fig. 8) interprets as an ooecium. 

 If my interpretation is correct, the presence of rosette plates communicating 

 with the zooecium in advance of it would require no explanation, while on 

 Nordgaard's interpretation this feature would be unique and difficult of explana- 

 tion. In Nordgaard's figure 8, that part labeled "proximal wall of the ooecium" 

 should be the distal wall of the endozooecial ooecium. The internal structure 

 of the zooecium also indicates that the ooecia are endozooecial. 



Callopora spitzbergensis (Bidenkap) 



Lat. 70° 24' N., long. 161° 25' W., C.A.E. Station 23, 9 to 10 fathoms, 

 Aug. 19, 1913, numerous portions of colonies, one young colony inside of a dead 

 Chrysodomus-sheM. 



King George sound, Hudson strait, Ungava, Sept. 9, 1897, Diana Expe- 

 dition, 40 fathoms, several colonies, with ooecia. 



Some of the specimens are bilaminate. There is much variation in the 

 size of the avicularium and it may be turned in various directions. Some of 

 the zooecia in specimens from both localities bear a short erect spine at each 

 distal corner as figured by Smitt (1868, PI. XX, fig. 35). Nordgaard (1918, 

 p. 45) states that he has never seen the spines, and they appear to be of rare 

 occurrence. 



What seems to be a variety of this occurred among the material from 

 C.A.E. Station 23. In this one small specimen the zooecia are smaller, the 

 avicularia are smaller, and there ' are sometimes two of them, at the distal 

 corners of the zooecium and faced toward each other. The ooecium and the 

 zooecial characters are similar to those of spitzbergensis and the dorsal wall is 

 similarly perforated. 



Tegella unicornis (Fleming) 

 L.E. Station 37e, 2 fathoms, Sep 



North Somerset, Aug., 1904, Neptune Expedition, on algae. 



Bernard harbour, C.A.E. Station 37e, 2 fathoms, Sept. 1, 1914, one colony 

 on Laminaria. 



