NO. 2 osburn: eastern pacific bryozoa — cheilostomata 289 



Euteleia evelinae Marcus, 1938 

 Plate 31, fig. 4 



Euteleia evelinae Marcus, 1938:33. 



The zoarium is uniserial, branching irregularly on the stems of erect 

 bryozoans and hybroids (Marcus indicated algae and stones), often in 

 parallel series with free branches which may extend for a short distance. 



The zooecia average about 0.40 mm in length, fusiform, much nar- 

 rowed at the base where there is a chitinous joint. The front is evenly 

 arched, smooth with numerous pores over the whole front to the edge 

 of the aperture; there is a short conical umbo in the median line and 

 one on each side opposite the operculum ; the peristome is low and thin. 

 The primary aperture is short-clavate, terminal and very oblique, rounded 

 distally, the condyles strong and the proximal border arcuate. 



Each zooecium arises from the dorsal side of the preceding one at 

 the distal end ; in branching two zooecia arise side by side. When zooecia 

 lie side by side their walls may partially fuse, and occasionally even 

 when they are at a little distance a short tube from the side of one may 

 fuse with the wall of its neighbor. No avicularia ; no ovicells. Described 

 by Marcus from Bahia de Santos, Brazil, 20 meters. 



Hancock Stations: 445-35, Panama City, Panama, shore; 847-38, 

 SW of Zorritos Light, Peru, shore; 1385-41, at 16>< mi. SSE of East 

 Point, Santa Rosa Island, California, 76 fms. The species has a wide 

 range on the Pacific coast and a considerable depth range. It is an 

 inconspicuous species because of its small size and its habit of closely 

 adhering to small stems, and it may be much more common than the 

 number of stations would indicate. 



Family Petraliidae Levinsen, 1909 



The ovicell is hyperstomial with very small pores. The aperture is 

 surrounded by a shield placed next to the tremocyst. On the dorsal 

 surface there is near the distal end of each zooecium a perforated area 

 with small radicular pores (after Canu and Bassler, 1929:250). 



The above description of the family is based on Petralia and Petra- 

 liella. The introduction of several other genera into the family neces- 

 sitates some modification of the description. Coleopora, Hippopodina and 

 Cycloperiella have no dorsal attachment processes and in Robertsonidra 

 they are in the form of scattered tubules ; the circumoral shield is variable 

 in width or wanting; the frontal of Robertsonidra is a pleurocyst. 



