318 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Affinities. — The operculum is not in agreement with the exterior 

 aspect of the apertura. The latter appears to us to be of the lepra- 

 lioid nature, especially since on a well preserved specimen we have 

 noticed two minute cardelles. The operculum is clearly schizo- 

 porellid and with a simplicity which approaches that of the genus 

 ScMzopodrella. We found two forms, one recalling Schizopodrella 

 unicornis Johnston, 1847, and the other ScMzopodrella nivea Busk, 

 1884. 



Exteriorily this species could be classed in the fossil genus Cyclo- 

 colposa Canu and Bassler, 1920, of the American Miocene, but lacking 

 specimens we have not been able to verify the presence of the char- 

 acteristic parietal dietellae. This species is quite variable in aspect. 

 Biology. — Our specimens from Jolo were living but they were not 

 ovicelled. 



Occurrence. — 



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



20 fathoms; S. Sh. 

 D. 5144. Jolo Light, Jolo; 6° 05' 50" N.; 121° 02' 15" E.; 



19 fathoms; co. S. 

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

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

 Cotypes.—C&t. Nos. 8078-8080, U.S.N.M. 



SCHIZOPORELLA PERFORATA, new species 



Plate 35, fig. 9 



Description. — The zoarium is rose color and encrusts shells. The 

 zooecia are little distinct, separated by a furrow of little depth 

 elongated, elliptical; the frontal is very slightly convex, perforated 

 with large tremopores. The apertura is elliptical, transverse, with 

 a short, triangular rimule and two internal condyles. The ovicell is 

 deeply embedded in the distal zooecium; it is orbicular, granular, 

 little globular, and little salient; it is perforated by an enormous 

 frontal pore. 



Measurements. — 



A . fk=0.15mm. ~ • \Lz -0.65-0.70 mm. 



Apertura 7 "„' n nr , Zooecia 7 nnr 



* \la -0.20-0.25 mm. \lz =0.35-0.45 mm. 



Variations. — The orifice of the ovicelled zooecia appears different 

 from the other apertures but this is an illusion caused by the embed- 

 ding of the ovicell in the distal zooecium. The visible orifice is a 

 false aperture for in dissection the true aperture appears; its oper- 

 culum closes the ovicell. 



Biology. — Our specimens were rose colored. This pigmentation 

 of calcite is not rare in the bryozoa but we are ignorant if it has any 

 relationship to the nature of alimentation. Our specimens were 

 dead. 



