THE MOUNT DESERT REGION 303 



Jullien and Calvet (1903, p. 163) recorded it from the Grand 

 Banks of Newfoundland; Canu and Bassler (1928, p. 62) have 

 noted its presence north of Cuba, and on European shores 

 various authors have recorded it from the Mediterranean to 

 the Arctic Ocean. 



It may be readily identified by the presence of small ves- 

 tigial (?) tubes interspersed among the normal ones and by 

 the ooecium, which appears like a rounded or oval blister-like 

 inflation on the surface of the colony, always surrounding a 

 few zooecial tubes. 



Tubuliporidae Johnston, 1838 

 TuBULiPORA Lamarck, 1816 



TuBULiPORA FLABELLARis (Fabricius), 1780. PL 2, fig. 10; 

 pi. 5, fig. 1. (Osburn, 1912, p. 218, for records and references.) 

 Common on hard bottoms ; taken at a few shore stations, espe- 

 cially on algae. When growing on hydroid stems the colonies 

 are highly irregular in form. Collected at five shore stations 

 and nineteen dredging stations. The species is common and 

 widely distributed in northern waters on both sides of the 

 xltlantic. 



The zooecial tubes are elongate and rather irregular in dis- 

 tribution. The ooecium is an irregular lobate inflation among 

 the bases of the erect tubules. The ooeciostome is a narrow 

 slit-like opening at the end of a shorter erect tubule which 

 is about half the size of the ordinary tubule and is sometimes 

 twisted. 



TuBULiPORA LiLiACEA (Pallas), 1766. PI. 2, fig. 11. (Osburn, 

 1912, p. 217, for references and synonymy; Whiteaves, 1901, 

 p. Ill, for Canadian records.) A single specimen from an 

 unnumbered station had an ovicell sufficiently developed for 

 identification. The species is widely distributed on both sides 

 of the Atlantic. 



This form usually grows attached to the stems of hydroids 

 and other Bryozoa and occasionally on shells. The outline 

 of the colony is very irregular as a rule. The erect portions 

 of the tubules are tall and often connate in series, though 



