BRYOZOA OF THE PHILIPPINE REGION 503" 



The longitudinal section shows that the zooecia of the two lamellae 

 are very closely bound one to the other. 



This species is very well characterized by the numerous pores which 

 ornament the zoarial surface, which permits the easy determination 

 of the specimens in spite of the great general irregularity. 



Biology. — The geographic distribution of this species is rather 

 large. We observe it throughout the Sulu Sea, but often it is rare. 

 On the contrary, in the China Sea the specimens are more abundant 

 and we know it as well on the Asiatic side as on the Borneo side. Our 

 Figure 8 belongs probably to a closely related but distinct species. We 

 reproduce it because of its particular aspect. The specimen shows 

 between the zooecia linear or curved interzooecial cavities resulting 

 from incomplete calcification. This arrangement is rather frequent 

 in a large number of Cretaceous genera and causes the determination 

 to be very difficult. The genus Beisselina notably presents most 

 fantastic variations. But here the interstices are occasioned by the 

 narrowing of the pyramid which surmounts the hexagonal zooecia! 

 prism. 



Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.J 120° 58' 30" E.; 20 



fathoms; S. Sh. 

 D. 5144. Jolo Light, Jolo; 6° 5' 50" N.; 121° 2' 15" E.; 19 



fathoms; co. S. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 51' 40" N.; 120° 



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

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



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

 D. 5311. China Sea, vicinity of Hong Kong; 21° 33' N.; 116° 



15' E.; 88 fathoms; crs. S., Sh. (common). 

 D. 5574. Simaluc Island, north of Tawi Tawi; 5° 30' 45" N.; 



120° 7' 57" E.; 340 fathoms. 

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

 119° 9' 52" E.; 175 fathoms; fine S., co.; 13° C. 

 Cotypes — Cat. Nos. 8307-8311, U.S.N.M. 



FLABELLOPORA LENTICULARIS, new species 



Plate 74, figs. 1-3 



Description. — The zoarium is free, lenticular, 3 mm. in diameter. 

 The angle of the initial base and the terminal angle are almost equal. 

 The external walls are adorned with a very large tuberosity formed by 

 the union of the two avicularia, distal and proximal; the orifice of the' 

 avicularia is large, elliptical, transverse, placed on a plane perpen- 

 dicular to that of the aperture. The peripheral zooecia do not have- 

 tuberosities but they bear two salient avicularia. The aperture- is 

 small, orbicular; the distal sinus is scarcely distinct; the proximal 

 pore is little visible. 



