BRYOZOA OF THE PHILIPPINE REGION 383 



organ and not an independent, complete being. Each colony of 

 Adeonidae is an animal with a perfect knowledge of the rules of 

 hydrostatics. 

 Occurrence. — 



D. 4807. Cape Tsiuka, Sea of Japan, 41° 36' 12" N.; 140° 36' E. 

 D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 



20 fathoms; S., Sh. 

 D. 5141. Jolo Light, Jolo; 6° 09' N.; 120° 58' E.; 29 fathoms; 



co. S. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 



47' 10" E.; 21 fathoms; co. S. Sh. 

 D. 5162. Tinagta Island, Tawi Tawi Group; 5° 10' N.; 119° 47' 



30" E.; 230 fathoms; S. brk., Sh. crs.; 11.6° C. 

 D. 5219. Mompog Island, between Marinduque and Luzon; 

 13° 21' N.; 122° 45' E.; 530 fathoms; gn.M.; 10.4° C. 

 Cotypes — Cat. Nos. 8184-8186, U.S.N.M. 



ADEONELLOPSIS UNILAMELLOSA, new species 



Plate 53, figs. 6, 7 



Description. — The zoarium is unilamellar and creeps on fragments 

 of sponges. The zooecia are distinct, separated by a furrow, some- 

 what elongated, elliptical, surrounded by a line of parietal dietellae, 

 separated by short costules; the frontal is convex, ornamented with 

 a large oblique avicularium and a cribriform area very narrow and 

 in the form of a cleft. The gonoecia have much larger dimensions. 

 The peristome is salient and slightly tuberose; the apertura is semi- 

 elliptical and transverse. 



Measurements. — 



. |k=0.05 mm. „ . fis -=0.35 mm. 



Apertura -L _ __ Zooecia, . or . 



1 (la <= 0.07 mm. 'Zz^O.20 nun. 



Affinities. — This species is very well characterized by its uni- 

 lamellar zoarium and by the very narrow cleft which forms the 

 cribriform area. It is very rare. 



Occurrence.— D. 5478. Tacbuc Point, Leyte; 10° 46' 24" N.; 

 125° 16' 30" E.; 57 fathoms; Sh. 



Holotype.—C&t. No. 8187, U.S.N.M. 



ADEONELLOPSIS FALCIFERA, new species 



Plate 53, fig. 8 



Description. — The zoarium is free and bilamellar; the fronds are 

 broad and bifurcated. The zooecia are distinct, separated by a 

 deep furrow, largo, elongated, elliptical; the frontal is convex and 

 forms a collar surrounding the oral avicularium the cribriform area 

 and the frontal avicularium. The apertura is small, semilunar, 

 transverse. The oral avicularium is triangular, tho point above and 



