NO. 2 OSBURN: eastern pacific BRYOZOA — CHEILOSTOMATA 485 



3. Zoarium with linear branches of usually 1 to 3 series of 



zooecia marginata 



Zoarium irregular but not branching in linear form 4 



4. Ovicell at base of peristome 5 



Ovicell higher up on distal side of peristome 6 



5. Peristome short, thick- walled, smooth ; zooecia large and 



coarse lacunosa 



Peristome high and thin, delicately costulate .... hippocrepis 



6. Peristome very high, thin, costate, flared, with spinous processes all 



around the border spinulosa 



Peristome moderately high, smooth to coarsely costate, flared 



especially on the proximal lip socialis 



7. Also a still smaller species, zooecia not more than 0.40 mm long, 



with V-shaped sinus ; avicularia pedicellate and with a cervicorn 

 branch which sometimes unites with the opposite one to form a 

 bridge distal to the aperture admiranda 



Lagenipora punctulata (Gabb and Horn), 1862 

 Plate 60, figs. 1-2 



Entalophora punctulata Gabb and Horn, 1862:171. 

 Laffenipora spinulosa H'mcks 1884:40 (in part). 

 Lagenipora spinulosa, Robertson, 1908:283 (in part). 

 Tubucellaria punctulata, Canu and Bassler, 1923 :170. 

 Lagenipora erecta O'Donoghue, 1923 :33 ; 1926 :74. 



Zoarium erect and branching from a small encrusting base, varying 

 greatly in size and form, attached usually to stems of hydroids, bryozoans, 

 etc., coarse and stiff to a height of 20 mm or more. There is much varia- 

 tion in the diameter of the branches, as few as 4 zooecia to as many as 

 12 surrounding the axis. The zooecia are lageniform, more or less em- 

 bedded in the rounded stem, with a tubular peristome projecting at a 

 marked angle; moderately large (0.60 to 0.80 mm long by 0.40 to 

 0.50 mm wide), the frontal considerably inflated and coarsely punctured. 

 The peristomial tubes vary in length, occasionally as long as the zooecial 

 body but usually much shorter, definitely ribbed with the costae extending 

 from the base to the tip; in younger zooecia the proximal lip is often 

 flared or extended forward, and often Math low crenulations. There is 

 a small avicularium on either side, sometimes projecting above the level 

 of the peristome but usually on a level with its rim. In older specimens 

 the tremocyst may extend upon the peristome nearly to its tip. The 

 primary aperture is slightly ovate, length 0.16 mm, width 0.13 mm. 



