116 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Family Gellariidae Hincks, 1! 



The zoaria are erect and branched, with chitinous joints, the inter- 

 nodes long and rounded. 



Genus GELLARIA Ellis and Solander, 1786 

 Genotype, Eschara fistulosa Linnaeus, 1758. 



Key to Species of Cellaria 



1. Avicularian mandible long-triangular veleronis 



Avicularian mandible short, rounded 2 



2. Avicularium larger than a zooecium, the mandible semicircular 



and brown in color mandibulata 



Avicularium much smaller than a zooecium, the mandible semi- 

 circular, without color diffusa 



Cellaria mandibulata Hincks, 1882 

 Plate 13, fig. 1 



Cellaria mandibulata Hincks, 1882:462; 1884:203. 

 Cellaria mandibulata, Robertson, 1905 :288. 

 Cellaria mandibulata, O'Donoghue, 1923 :23. 

 Cellaria mandibulata, Canu and Bassler, 1923 :86. 



Zoarium erect, 25 to 75 mm in height ; much branched, the branches 

 arising at any point on an internode but usually near the distal end ; the 

 chitinous joint dark brown or black ; internodes usually long. 



Zooecia moderately large, 0.45 to 0.60 mm in length by about 0.20 

 mm in greatest width, narrowed to about 0.10 mm at the proximal end; 

 cryptocyst flat and roughened; aperture semicircular (0.10 mm wide), 

 the cryptocyst forming a slightly raised shelf on the proximal border. 

 The chief distinguishing character is the very large avicularium which 

 is broader than a zooecium, the brown semicircular mandible (0.15 to 

 0.20 mm in width) usually being very conspicuous. 



Hincks described the species from Virago Sound, British Columbia; 

 Robertson states that it is most common in southern California; O'Dono- 

 ghue lists it for several British Columbia localities, and Canu and Bassler 

 record it from the Pleistocene of Los Angeles, California. Recorded by 

 Osburn (1947:18) from Hancock Station A18-39, Aruba Island in the 

 Caribbean Sea; otherwise it has not been found outside of the Eastern 

 Pacific area. 



Hancock Stations: It is abundant and generally distributed from 

 along shore to a depth of 80 fms all along the coast and about the islands 



