' ANTARCTIC BRYOZOA — ROGICK 237 



could not be ascertained. Measurements of the rounded openings 

 are: length 0.058 to 0.144 mm. (average 0.103 mm.) and width 0.058 

 to 0.101 mm. (average 0.084 mm.). Calvet's specimens (1909, pi. 2, 

 fig. 3) had crescent-shaped ovicell openings but he stated (1909, p. 24) 

 that the concavity becomes almost rectilinear, thus somev/hat approx- 

 imating the condition of the U. S. Navy expedition's specimens. 

 The ovicells are located between the zooecial orifice and the distal 

 arch of the zooecial wall. 



Avicularia: The avicularia are set at a slight slant at the proximal 

 border of a zooecium. Their dimensions are: greater diameter 

 (length) 0.216 to 0.22 mm. (average 0.26 mm.); lesser diameter 0.158 

 to 0.202 mm. (average 0.177 mm.). The beak is directed diagonally 

 with respect to the longitudinal axis of the zooecia. Mandibles were 

 not seen. 



Distribution: Specimens were collected at Antarctic Station No. 

 44 from a depth of 100 fathoms. Calvet reported the species from 

 Booth- Wandel Isle at a depth of 40 fathoms. He pictured it accu- 

 rately but gave no measurements for it. 



Genus Cellariaeformaf new genus 



Diagnosis: Colony erect, free, cylindrical, calcareous. No colony 

 fragments were long enough to indicate if the colony was capable of 

 branching and in what manner. Zooecia arranged in transverse 

 series around the imaginary longitudinal axis of the sta.lk. Zooecia 

 of considerable length, the proximal part always hidden beneath and 

 between the side walls of neighboring proximal zoids. Areolation 

 rhombic to hexagonal. Zooecial orifice slightly salient, wider than 

 long, angular, distal border and lateral walls straight, proximal border 

 concave. Two proximal condyles and two distal teeth in orifice. 

 Space between distal rim of orifice and distal arch or cornice of zooecial 

 wall considerable. Avicularia small, vicarious, resembling those of 

 Melicerita more than those of Cellaria. Avicularian mandible wider 

 than long and with a broadly curved border. 



The genus name indicates its very close resemblance to Cellaria. 



The genotype of the new genus is Cellariaeforma parvimuralis. 



Cellariaefortna coronata, new species 



Plate 8,C 



Diagnosis: Characters like those of the genus plus the following 

 ones. Zooecia arranged in transverse series of four or five around 

 the imaginary longitudinal axis of the stalk. Areolation hexag- 

 onal. Visible zooecial side walls obliquely flared. Cryptocyst some- 

 times tuberculate. Prominent cryptocyst ridges meet to enclose a 

 large frontal area, like a garland around a neck, hence the species 



350640—56 2 



