NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA — CYCLOSTOMATA 739 



Division 3. Vesicularina Johnston, 1847 



The ctenostomes included within the limits of this grouping char- 

 acteristically have relatively heavy, thickened, usually branching, septate 

 stolons. The zooecia bud directly from the stolon. Polypide usually 

 provided with a gizzard, or as Harmer, 1915:60, stated, "Gizzard 

 present in most of the genera, perhaps in all," 



Family Vesiculariidae Johnston, 1838 



Zoaria erect or creeping, consisting of two types of zooecia, the keno- 

 zooecia constituting the stolons, and the autozoids the feeding individ- 

 uals. From within each internode of a stolon arise several zooecia, the 

 arrangement being characteristic within the genera. 



Genus VESIGULARIA J. V. Thompson, 1830 



Zoaria erect, the main stolon or stolons supported on the substrate 

 by a number of kenozooecial rhizoid-like runners. Zooecia ovoid to 

 elongate cylindrical, distinct, arranged within an internode in a single 

 series. Zooecia are contracted at the base, and the polypide is provided 

 with a prominent gizzard. Genotype: Sertularia spinosa Linnaeus, 1758. 



Vesicularia fasciculata Soule new species 

 Plate 78, fig. 6 



Diagnosis : Zoaria erect, unbranched, arising from a base supported 

 by tubular, root-like, kenozooecial fibers. The main axis of the zoarium 

 is composed of a series of 6 to 8 stout parallel or entwined stolons ad- 

 herent to each other so as to form an elongated bundle. Zooecia elongate, 

 cylindrical, arising from the stolons in a linear series, containing poly- 

 pides each bearing 12 short tentacles and a prominent gizzard. 



Description: Of the three zoaria representing this species in the 

 Hancock collection, the longest measured 2.80 cm in height, prior to 

 the removal of portions for sectioning and for whole-mounts, while the 

 shortest measured barely 0.6 cm. The remaining zoarium was in a very 

 poor state of preservation. 



The zoaria arise in a single, non-branching axis of growth, from a 

 base supported by kenozooecia in the form of tubular radiculate fibers. 

 The main axis mentioned above consists of a series of 6 to 8 or more 

 robust stolons adherent to and twisted about each other to form an 



