NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA — CYCLOSTOMATA 717 



branched colony. In another case what appears to be lateral budding 

 involves 3 colonies (or sub-colonies) ; these might have been produced 

 by the fusion of separate colonies, but if so there is no definite line of 

 demarcation. 



The ovicells or brood-chambers, shown at or near the surface in two 

 of our specimens, are either at the edge of the central area and extending 

 between the rays or are farther out and entirely interradial or both; 

 they show the calcified bottom layer, which covers the submerged can- 

 celli, and the minutely perforated roofing layer. The roof of the ovicell 

 is again closed by secondary cancelli of the usual type. 



The ovicells appear to place this form definitely in Disporella, and 

 the character of the cancelli with thick walls (though they are but little 

 closed) also suggests this disposition. At the same time, the normal verti- 

 cal arrangement of the sub-colonies indicates Lichenopora but, as has 

 been shown above, this character does not appear to have positive generic 

 importance. 



Recorded by Canu and Bassler at Albatross Station D. 2815, Gala- 

 pagos Islands. 



Type, AHF no. 127. 



Type locality, Hancock Station 143-34, Wenman Island, Galapagos, 

 1°23'10''N, 91°48'45''W, 100-150 fms. 



Also at Hancock Stations: Galapagos Islands, 155-34, Albemarle 

 Island; 453, Gardner Island, and 454, Hood Island; 30 to over 100 fms. 



Disporella separata new species 

 Plate 74, figs. 5 and 6 



Zoarium a very complex colony of the kind known as Radiopora by 

 d'Orbigny, Busk, etc. It consists of about 30 sub-colonies rather reg- 

 ularly arranged over a rounded area about 15 to 20 mm, attached loosely 

 and spreading over the surface of a small dead barnacle and the shell 

 to which the barnacle is attached ; most of the basal lamina is free. The 

 sub-colonies are all well separated from each other by a few rows of 

 cancelli and are quite regular in size and form ; the discs are short-ovate, 

 about 2.5 by 2 mm in diameter, with the radii varying in number from 

 8 to 12. The rays consist of small ovate clusters of peristomes, biserial 

 or triserial, which often become uniserial at the outer end ; not infre- 

 quently uniserial rays are present, and sometimes these may become 

 biserial at the outer ends; while the triserial cluster appears to be the 

 dominant form, all of these variations may be found on a single sub- 

 colony and on any part of the complex zoarium. The peristomes are 



