252 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105 



and under the two next distal zooecia, and opening to the outside by 

 an arched ooecial pore just above the margin of the zooecium. 

 Measurements were not given, 



Avicularia: Avicularia were not found either by Thornely or by 

 the present wTiter, although it may be that had material been more 

 plentiful avicularia might have been found. Brown (1952, pp. 

 165-166) discussed and illustrated a species, Melicerita angustiloba 

 Tenison- Woods, which very closely resembles M. obliqua except that 

 the former is a much smaller species and has a different type of 

 ooeciopore. 



Radicles: Chitinous tubules, cylindrical, thin-walled, transversely 

 striated, arise from some of the zooecia (pi. 11,G,I). They emerge 

 through the frontal below the orifice, enlarging in diameter a short 

 distance out from the zoid. Measurements had to be made on 

 flattened tubes at their thickest points. This diameter varies from 

 0.446 to 0.590 mm. (average 0.504 mm.). 



Distribution: The U. S. Navy specimens were collected at Ant- 

 arctic Station 44 from a depth of 100 fathoms. Thornely 's specimens, 

 came from Commonwealth Bay, Station 12, at 110 fathoms. 



