BRYOZOA OF THE PHILIPPINE REGION 305 



also found in the temperate zone where other species of the genus 

 abound. 



Occurrence. — 



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



E. 

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

 co. S. 

 Holotype.— Cat. No. 8058, U.S.N.M. 



SCHIZOMAVELLA SIMPLEX, new species 



Plate 34, fig. 2 



Description. — The zoarium encrusts nullipores. The zooecia are 

 distinct, separated by a deep furrow, little regular, subrectangular, 

 little elongated; the frontal is convex and perforated by a multitude 

 of small tremopores. The aperture is very little elongated, almost 

 orbicular with a broad triangular shallow rimule; the peristome is 

 broad, salient, and bear some short spines. The ovicell is globular, 

 separated from the frontal by a sutural line, of the same structure 

 as the frontal, closed by the operculum. Frequently there are two 

 small avicularia on each side of the apertura. 



Measurements. — 



^ Ua =0.10 mm. Xlz =0.24-0.30 mm. 



Affinities. — Two lucidae on the operculum mark the position of the 

 two condyles of articulation. As in Schizomavella linearis Hassall, 

 1841, the operculum closes the ovicell in this species and in spite of 

 the absence of the frontal avicularium we are obliged to classify it 

 in Schizomavella. The avicularia, again, do not furnish an exclusive 

 generic character. Moreover their presence in Schizomavella is quite 

 variable and causes the determination of species of this genus to 

 be very difficult. 



Biology. — Our specimens were living. The species was in reproduc- 

 tion April 23, 1908 (930 meters). 



Occurrence. — D. 5219. Mompog Island, Marinduque; 13° 21' X. ; 

 122° 18' 45" E.; 530 fathoms; gn. M.; 10.4° C. 



Holotype.— Cat. No. 8060, U.S.N.M. 



SCHIZOMAVELLA (METROPERIELLA) OVOIDEA. new species 



Plate 33, figs. 6-8 



Description. — The zoarium is very rarely unilamellar but encrusts 

 shells and much more frequently bryozoa (Adeonellopsis) The zooecia 

 are distinct, separated by a shallow furrow, somewhat elongated, 

 ovoid; the frontal is little convex and formed by a tremocyst with 

 small pores superposed on a thin olocyst. The apertura is transverse 

 or orbicular; two small cardellcs separate a large anter from a very 



