Vot. 2] Robertson.—Non-Incrusting Bryozoa. 287 
Cellaria Lamouroux. 
Cellaria Lamouroux, 1812. 
Salicornaria Cuvier, 1817. 
Cellaria (part), Johnston, 1847. 
Salicornaria, Johnston, 1847. 
Cellaria (part) d’Orbigny, 1850. 
Salicornaria, Busk, 1852. 
Cellaria, Hincks, 1880. 
Zoarium jointed at intervals, internodes connected by horny 
tubes. Zoawcia alternate, depressed in front, and surrounded by 
a raised border. Avicularia immersed, irregularly distributed, 
situated above a zocecium, or in place of one. Oacia immersed. 
KEY TO SPECIES OF CELLARIA. 
1. Branching dichotomous; avicularia with triangular mandible directed 
LO syyamniyy Ts Cl ieee ys tec ee eae ae ee Ben ee ee eee C. borealis 
OLEATE rear Lana LT Ca ETT U1 2 
2. Internodes small, avicularia large, twice the size of an ordinary 
zocecium, mandible rounded, directed upward........ Cc. mandibulata 
2. Internodes long, few, avicularia small, mandible rounded, directed 
UND EUR INGOT OMG WED Gl scorer re eee eee ee C. diffusa 
831. Cellaria borealis (Busk) Smitt. 
BI PXhVs fic. 86 BI xXeval fics 102: 
Salicornaria borealis Busk, 1855, p. 254, Pl. I, figs. 1, 2, 3. 
Cellaria borealis, Smitt, 1867, pp. 383 and 361, Pl. XX, fig. 17. 
Zoarium growing in luxuriant masses 75-100 mm. in height 
(Pl. XVI, fig. 102), branching dichotomous, except at the ex- 
tremities where the internodes are frequently tipped with three 
or four very small terminal internodes. IJnternodes of varying 
length, about a centimeter on an average, club-shaped; joints 
not black; young actively growing portions of the colony bright 
flesh pink. Zowcia (Pl. XIV, fig. 86, zoe.) elongate, very little 
wider toward the middle than at the two ends; alternate, sur- 
rounded by a raised crenulate border, the rows of zoccia sepa- 
rated by sinuous lines; front wall caleareous, and except upon 
the operculum which is large and semicircular on the distal 
edge, is marked by rather coarse punctures; orifice at summit 
of zoecium. Avicularia (av.) above the zocecia distributed at 
