IOd Canadian Arctic Expedition, 1913-18 



Microporella ciliata (Pallas) 



Off Cockburn point, Dolphin and Union strait, C.A.E. Station 43a, 100 

 meters, Sept. 13, 1915, one small colony on a worm tube. 



King George sound, Hudson strait, Ungava, Diana Expedition, Sept. 9, 

 1897, 40 fathoms, one small colony on a barnacle. 



Peristomella (Escharoides) jacksoni (Waters) 



Off Cockburn point. Dolphin and Union strait, C.A.E. Station 43a, 100 

 meters, Sept. 13, 1915, two small colonies on shells. 



Smittina solida (Stimpson) 



Off Cockburn point, Dolphin and Union strait, C.A.E. Station 43a, 100 

 meters, Sept. 13, 1915, several colonies attached to shells. 



Smittina concinna (Busk) 



King George sound, Hudson strait, Ungava, Diana Expedition, Sept. 9, 

 1897, 40 fathoms. One colony with ooecia, on a dead shell. 



This species in recent years, has been shifted back and forth between 

 Porella and Smittina, by various authors. According to the most recent dis- 

 criminating study by Canu and Bassler (1920, p. 457) its mode of calcification, 

 as well as the presence of a lyrula and cardelles, shows it to be a Smittina. 



Smittina reticulato-punctata (Hincks) 



Lat. 70° 24' N., long. 161° 25' W., C.A.E. Station 23, Aug. 19, 1913, 9 to 

 10 fathoms, several small colonies. 



Smittina bella (Busk) 



Point Barrow, Alaska, on sandspit, on beach, C.A.E. Station 24, end of 

 August, 1913, one large, highly calcified, dead and somewhat worn colony on 

 SL Buccinum-sheW; lat. 70° 24' N., long. 161° 25' W., C.A.E. Station 23, 9 to 10 

 fathoms, Aug. 19, 1913, a similar specimen on a Chrysodomus-shell. 



Smittina (Porella) laevis (Fleming) 



Off Cockburn point. Dolphin and Union strait, C.A.E. Station 43a, 100 

 meters, Sept. 13, 1915. A portion of one colony on a dead shell. 



Canu and Bassler (1920, p. 457) point out that this species must be removed 

 from the genus Porella on account of its mode of calcification (pleurocoyst) in 

 spite of the absence of a lyrula. 



Mucronella (Escharella) indivisa (Levinsen) 



Off Cockburn point. Dolphin and Union strait, C.A.E. Station 43a, 100 

 meters, Sept. 13, 1915, a number of well developed colonies on shells and one 

 on a worm tube. ,; 



Mucronella ventricosa (Hassall) 



King George sound, Hudson strait, Ungava, Diana Expedition, Sept. 9, 

 1897, 40 fathoms, several colonies on barnacles. 



Rhamphostomella bilaminata (Hincks) 



Lat. 70° 24' N., long. 161° 25' W., C.A.E. Station 23, Aug. 19, 1913, 9 to 

 10 fathoms, one small colony on a hydroid stem. 



