NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 737 



adnata portion of the zooecium is represented by a delicate stolon-like 

 tube and by the base of the peristome into which it usually passes 

 abruptly, although it more rarely dilates gradually as it approaches this 

 part. The branching is of the cruciform type. Gizzard absent." Harmer, 

 1915:52. 



Genus NOLELLA Gosse, 1855 



Zooecia cylindrical, elongate, with considerable variation in size within 

 the same zoarium. The proximal ends of the zooecia are prolonged, 

 narrowed to form connecting tubular extensions. The cuticle may, on 

 occasion, be covered by a very fine argillaceous coat. Genotype : Nolella 

 stipata Gosse, 1855. 



Nolella stipata Gosse, 1855 



Plate 78, fig. 5 



Nolella stipata Gosse, 1855:35-36. 

 Farrella gigantea Busk, 1856:93. 

 Farrella dilatata, Hincks, 1860:279. 

 Cylindroecium giganteuTu, Hincks, 1884:208. 

 Cylindroecium papuense Busk, 1886:38. 

 Cylindroecium giganteum, O'Donoghue, 1926:60. 



Zoaria with stolonal portion adhering to varied substrata ranging from 

 hydroids and algae to eroded mollusk shells and cheilostomatous bryo- 

 zoans. The zooecia are chitinous, erect, cylindrical. The cuticle is cov- 

 ered with an extremely fine layer of silt, which does not, however, totally 

 obscure the view of the polypide in alcoholic or wet-mount preparations. 

 The zooecia are extremely variable in length, with mature specimens 

 ranging in length from 0.90 to 3.80 mm, and in width from 0.17 to 

 0.25 mm. The proximal portion of the zoid, the basal area, is expanded 

 (dilated) forming a junction point for 2, 4, or even 6 of the stolons. 

 The only stolon that is not set off from the basal dilation by a distinct 

 diaphragm is the one from which the zoid arises. The degree of basal 

 dilation seems to be correlated with the type of substratum. The speci- 

 mens in the collection that are adherent to a soft substrate, such as the 

 algae or the hydroids, have a much less prominent dilation than those 

 adhering to a hard mollusk shell, where the proximal dilation is very 

 great. (See Hincks, 1880:537, pi. 77, figs. 1 & 2, and pi. 79, figs. 1-3). 



This species is liberally represented in the cooler waters of the Atlantic 

 on both the European side and the North American. On the Pacific 



