624 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



This short description by the above authors and their photographs of 

 the species (Plate 11, figs. 1 and 2) are sufficient for identification, 

 though they did not have the ovicell. In our specimens the lamella, while 

 it extends somewhat from the borders, does not come anywhere near 

 connecting them. This may be due to the fact that our colonies are much 

 smaller and probably younger. 



Four ovicells are present in our specimens. They are small, short and 

 very bulbous, raised as high as the peristomes surrounding them, thick- 

 walled and shining; the ooeciostome is a short, round tube, its diameter 

 nearly that of the peristomes, and terminal, which, in this case, is nearly 

 on the top of the semiglobular ovicell. One of the ovicells is slightly 

 enlarged and its border encloses two peristomes. 



Described from Albatross Station D. 2813, Galapagos Islands. 



Hancock Stations: 143-34, off Wenman Island, 1°23'10"N, 91°48' 

 45"W, at 100-150 fms; 155-34, off Tagus Cove, Albemarle Island, 

 0°16'45''S, 91°22'52"W, at 50-60 fms; and 453, Gardner Island, 35 

 fms, Galapagos Islands. 



Genus ONCOUSOEGIA Canu, 1918 



The zoarium is adnate, broadly multiserial, rounded or with flabellate 

 lobes; the zooecial tubes are long, distinct on the surface, quincuncially 

 arranged, the peristomes short and more or less erect. The ovicell is 

 simple, often differing only slightly from the zooecial tubules, the proxi- 

 mal end embedded between the neighboring tubules, distally expanding 

 gradually between the adjacent tubules and sometimes extending laterally 

 above them for a short distance. The ooeciostome is terminal, not asso- 

 ciated with a peristome, usually short, erect, smaller than the peristomes, 

 round, and not expanded at the tip. 



The genotype is Alecto dilatans Thompson (Johnston, 1847:281), 

 and not Tubulipora lobulata Hincks, 1880, as indicated by Canu, 1918: 

 325. Hincks confused two species in his Plate 61, and the figure 5, 

 from which Canu evidently drew his description, is that of Alecto 

 dilatans Thompson. (For details see Osburn, 1933:9-12). 



Oncousoecia diastoporides (Norman), 1868 



Plate 66, fig. 4 



Alecto diastoporides Norman, 1868:310. 

 Stomatopora diastoporides, Hincks, 1880:434. 

 Stomatopora diastoporides, Osburn, 1912:218. 

 Oncousoecia diastoporides, Osburn, 1933:9. 



