NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 713 



first observed one of these I thought it might be a monstrosity or per- 

 haps due to the attachment of an ancestrula, but the discovery of three 

 similar triple colonies and a very young bud on another proves it to be 

 a normal process. The sub-colonies are short stipitate with their borders 

 and most of the dorsal side entirely free. Thus they have some resem- 

 blance to d'Orbigny's "genus" Tecticavea, except that the sub-colonies 

 arise near the margin and are not superposed on the central area. In 

 each case the first sub-colony bears another similar to it but smaller. 

 They present the same characters as the primary one, with uniserial 

 radii, large central cancelli, moderately low connate peristomes and 

 inter-radial brood-chambers. 



Hancock Stations: 279-34, Santa Maria Bay, Lower California, 

 24°44'45"N, 112°15'20"W, and 1714-49 and 2180, Magdalena Bay, 

 the type locality of californica d'Orbigny, 10 to 18 fms. Also at 1242, 

 Anacapa Island, and 1662-48, Santa Cruz Island, southern Cahfornia; 

 1889-49, Cortez Bank at the United States-Mexican boundary; 275, 

 Raza Island, 675-37, Carmen Island, and 1044-40, Tiburon Island, 

 Gulf of California; and 468-35, Port Parker, Costa Rica. Depth 5 to 

 77 fms. Also 3 colonies from Tobago Island, Panama, each consisting 

 of several sub-colonies, Helen Hoyt, collector. 



Disporella ovoidea new species 



Plate 75, figs. 4 and 5 



Lichenopora radiata, Canu and Bassler, 1928:163; 1930:56. 

 Lichenopora radiata, Osburn, 1940:334; 1947:6. 



Zoarium more or less ovate, in older stages becoming low dome- 

 shaped ; the central area large, distinctly elongate, ovoid to elliptical, 

 much depressed in the young but thick and elevated nearly to the tips 

 of the zooecial tubes in older colonies ; 3 to 5 mm in the longest dimen- 

 sion. The zoids are in very definite uniserial rays, the longest ray noted 

 having 7 zoids. The tubes are moderately short and are connate to their 

 tips, which are without spinous projections or notches; the apertures 

 elongated in the direction of the rays, averaging 0.07 mm wide by 0.10 

 mm long, those at the outer ends of the rays usually larger than those 

 near the central area. The cancelli are large, about twice the size of the 

 zooecial apertures, but very soon become partially closed by an iris-like 

 diaphragm so that their apertures are funnel-shaped and surrounded by 

 hexagonal separating ridges. 'Tin-head" spicules are sometimes present. 



