BRYOZOA OF THE PHILIPPINE REGION 391 



This species is not rare in the vicinity of Borneo but its geographic 

 distribution is greater because we have found it at Romblon oh the 

 13th parallel. It appears to live especially in shallow waters on float- 

 ing algae. Our specimens from 37 fathoms and 175 fathoms were 

 dead and did not appear to have lived at the same place where they 

 were dredged. 

 Occurrence. — 



D. 5149. Sirun Island, Sulu Archipelago; 5° 33' N.; 120° 42' 



10" E.; 10 fathoms; co. Sh. 

 D. 5150. Sirun Island; 5° 23' 20" N.; 120° 35' 45" E.; 21 fath- 

 oms; co. S., Sh. 

 D. 5151. Sirun Island; 5° 24' 40" N.; 120° 27' 15" E.; 24 



fathoms; co. S., Sh. 

 D. 5163. Observation Island, Sulu Archipelago; 4° 59' 10" N.; 

 119° 51' E.; 28 fathoms; co. S. 



Fig. 148. — Hippaliosina acutirostris, new species 



A. Small bodies found in the interior of the zooecia, X85. B. Mandible, 

 X85. C. Operculum of ovicelled zooecium, X85. D-F. Different form of 

 opercula of ordinary zooecia, X85. 



D. 5179. Romblon Light, Romblon; 12° 38' 15" N.; 122° 12' 



30" E.; 37 fathoms; hard sand; 24.2° C. 

 D. 5579. Sibutu Island, Darvel Bay, Borneo; 4° 54' 15" N.J 

 119° 09' 52" E.; 175 fathoms; fine S. co.; 13° C. 

 Cotypes — Cat. Nos. 8175, 8196, U.S.N.M. 



Genus HIPPALIOSINA Canu, 1918 



HIPPALIOSINA ACUTIROSTRIS, new species 



Plate 55, figs. 1-4 



Description. — The zoarium is uni or multilamellar; it encrusts nul- 

 lipores, the debris of shells and bryozoa. The ectocyst is light col- 

 ored. The zooecia are distinct, separated by a furrow, elongated 

 claviform; the frontal is convex, surrounded by small, scattered 

 areolar pores and covered by a granular pleurocyst. The apertura 

 is large, elongated; its proximal border is triangular. Two avicularia 

 are symmetrically arranged above the apertura; the beak is sharp 

 pointed; the mandible is ramified like the horn of a deer. 



Measurements . — 



Apertura!^ = 0A2 mm ' Zooeciaff z -= 0A0 mm ' 



[la -0.16 mm \lz -0.22-0.28 mm. 



