BRYOZOA OF THE PHILIPPINE REGION 207 



Our specimens present some slight differences from the figure of 

 Busk. The scutum hides more of the opesium; the dorsal vibracular 

 chamber is smaller and has a small radicular pore. The internal 

 opesium is not visible and appears to be confused with the external 

 opesium. 



Occurrence. — 



D. 5151. Sirun Island, Sulu Archipelago, Tawi Tawi Group; 



5° 24' 40" N. ; 120° 27' 15" E. ; 24 fathoms; W. S, Sh. 



D. 5235. Pacific, Nagubat Island, east coast Mindanao; 9° 43' 



N.; 125° 48' 15" E.; 44 fathoms; sft. M. 

 D. 5478. Tacbuc Point, Ley te; 10° 46' 24" N.; 125° 16'30"E.; 

 57 fathoms; sh. 

 Geographic distribution. — China Sea; Tizard Bank, 27 fathoms. 

 Pacific; Admiralty Islands, north of New Guinea and several localities 

 in Malay region given by Harmer. 



Plesioty pes. —Cat. No. 7886, U.S.N.M. 



SCRUPOCELLARIA CURVATA Harmer, 1926 



Plate 8, figs. 12, 13 



1926. Scrupocellaria curvata Harmer, Polyzoa Siboga Expedition, p. 380, pi. 26, 

 figs. 11-15. 



Description. — The zoarium is articulated, ramified, dichotomous; 

 the segments are long and regular. On the frontal the zooecia are 

 indistinct. The opesium is almost entirely covered over by a broad, 

 convex, striated scutum. The lateral avicularium is very small, not 

 salient. The axial avicularia are transverse, salient, triangular; the 

 beak salient and elongated, is turned alternately to the right and to 

 the left. On the dorsal the zooecia are oblong and lozenge shaped. 

 The vibracular chamber is triangular, raised, long as half a zooecium; 

 the groove is deep, oblique, regular; the radicular pore is of medium 

 size. 



Measurements. — 



j • 9 fZ2 = 0.64mm. Width of segments = 0.52 mm. 



U2 = 0.16 mm. Avicularian chamber = 0.28 mm. 



Affinities. — Harmer, 1926, figures the joints "en echelon," the 

 articulation, the mandible and the remarkable structure of the 

 scutum. The striae decorating the latter are produced by "a broad 

 median cavity, passing into an external marginal tube, which gives 

 off recurrent, caecal branches running transversely, parallel to the 

 main cavity." This species differs from Scrupocellaria securifera 

 Busk, 1884, in its nonclaviform, broader and striated scutum and in 

 its narrower segments. Our specimens were dead. 



» In Scrupocellaria the zooecial dimensions are those of the two axes of the lozenge shaped area. 



